From e4d866cdea24543ee16ce6d07d80c513e86ba983 Mon Sep 17 00:00:00 2001 From: "JosephChan@via.com.tw" Date: Fri, 23 Jan 2009 15:37:39 +0800 Subject: [libata] pata_via: support VX855, future chips whose IDE controller use 0x0571 It supports VX855 and future chips whose IDE controller uses PCI ID 0x0571. Signed-off-by: Joseph Chan Acked-by: Tejun Heo Signed-off-by: Jeff Garzik --- include/linux/pci_ids.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index d56ad9c21c09..febc10ed3858 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -1357,6 +1357,7 @@ #define PCI_DEVICE_ID_VIA_8783_0 0x3208 #define PCI_DEVICE_ID_VIA_8237 0x3227 #define PCI_DEVICE_ID_VIA_8251 0x3287 +#define PCI_DEVICE_ID_VIA_8261 0x3402 #define PCI_DEVICE_ID_VIA_8237A 0x3337 #define PCI_DEVICE_ID_VIA_8237S 0x3372 #define PCI_DEVICE_ID_VIA_SATA_EIDE 0x5324 @@ -1366,10 +1367,13 @@ #define PCI_DEVICE_ID_VIA_CX700 0x8324 #define PCI_DEVICE_ID_VIA_CX700_IDE 0x0581 #define PCI_DEVICE_ID_VIA_VX800 0x8353 +#define PCI_DEVICE_ID_VIA_VX855 0x8409 #define PCI_DEVICE_ID_VIA_8371_1 0x8391 #define PCI_DEVICE_ID_VIA_82C598_1 0x8598 #define PCI_DEVICE_ID_VIA_838X_1 0xB188 #define PCI_DEVICE_ID_VIA_83_87XX_1 0xB198 +#define PCI_DEVICE_ID_VIA_C409_IDE 0XC409 +#define PCI_DEVICE_ID_VIA_ANON 0xFFFF #define PCI_VENDOR_ID_SIEMENS 0x110A #define PCI_DEVICE_ID_SIEMENS_DSCC4 0x2102 -- cgit v1.2.3 From abfe2d7b915c872f3a1fd203267cedebf90daa45 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 19 Jan 2009 20:54:54 +0100 Subject: Hibernation: Introduce system_entering_hibernation Introduce boolean function system_entering_hibernation() returning 'true' during the last phase of hibernation, in which devices are being put into low power states and the sleep state (for example, ACPI S4) is finally entered. Some device drivers need such a function to check if the system is in the final phase of hibernation. In particular, some SATA drivers are going to use it for blacklisting systems in which the disks should not be spun down during the last phase of hibernation (the BIOS will do that anyway). Signed-off-by: Rafael J. Wysocki Signed-off-by: Jeff Garzik --- include/linux/suspend.h | 2 ++ kernel/power/disk.c | 10 ++++++++++ 2 files changed, 12 insertions(+) (limited to 'include/linux') diff --git a/include/linux/suspend.h b/include/linux/suspend.h index 2b409c44db83..c7d9bb1832ba 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -237,6 +237,7 @@ extern int hibernate_nvs_alloc(void); extern void hibernate_nvs_free(void); extern void hibernate_nvs_save(void); extern void hibernate_nvs_restore(void); +extern bool system_entering_hibernation(void); #else /* CONFIG_HIBERNATION */ static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } static inline void swsusp_set_page_free(struct page *p) {} @@ -252,6 +253,7 @@ static inline int hibernate_nvs_alloc(void) { return 0; } static inline void hibernate_nvs_free(void) {} static inline void hibernate_nvs_save(void) {} static inline void hibernate_nvs_restore(void) {} +static inline bool system_entering_hibernation(void) { return false; } #endif /* CONFIG_HIBERNATION */ #ifdef CONFIG_PM_SLEEP diff --git a/kernel/power/disk.c b/kernel/power/disk.c index 45e8541ab7e3..432ee575c9ee 100644 --- a/kernel/power/disk.c +++ b/kernel/power/disk.c @@ -71,6 +71,14 @@ void hibernation_set_ops(struct platform_hibernation_ops *ops) mutex_unlock(&pm_mutex); } +static bool entering_platform_hibernation; + +bool system_entering_hibernation(void) +{ + return entering_platform_hibernation; +} +EXPORT_SYMBOL(system_entering_hibernation); + #ifdef CONFIG_PM_DEBUG static void hibernation_debug_sleep(void) { @@ -411,6 +419,7 @@ int hibernation_platform_enter(void) if (error) goto Close; + entering_platform_hibernation = true; suspend_console(); error = device_suspend(PMSG_HIBERNATE); if (error) { @@ -445,6 +454,7 @@ int hibernation_platform_enter(void) Finish: hibernation_ops->finish(); Resume_devices: + entering_platform_hibernation = false; device_resume(PMSG_RESTORE); resume_console(); Close: -- cgit v1.2.3 From d7b1956fed33d30c4815e848fd7a143722916868 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 19 Jan 2009 20:55:50 +0100 Subject: DMI: Introduce dmi_first_match to make the interface more flexible Some notebooks from HP have the problem that their BIOSes attempt to spin down hard drives before entering ACPI system states S4 and S5. This leads to a yo-yo effect during system power-off shutdown and the last phase of hibernation when the disk is first spun down by the kernel and then almost immediately turned on and off by the BIOS. This, in turn, may result in shortening the disk's life times. To prevent this from happening we can blacklist the affected systems using DMI information. However, only the on-board controlles should be blacklisted and their PCI slot numbers can be used for this purpose. Unfortunately the existing interface for checking DMI information of the system is not very convenient for this purpose, because to use it, we would have to define special callback functions or create a separate struct dmi_system_id table for each blacklisted system. To overcome this difficulty introduce a new function dmi_first_match() returning a pointer to the first entry in an array of struct dmi_system_id elements that matches the system DMI information. Then, we can use this pointer to access the entry's .driver_data field containing the additional information, such as the PCI slot number, allowing us to do the desired blacklisting. Signed-off-by: Rafael J. Wysocki Signed-off-by: Jeff Garzik --- drivers/firmware/dmi_scan.c | 74 +++++++++++++++++++++++++++++++++------------ include/linux/dmi.h | 1 + 2 files changed, 56 insertions(+), 19 deletions(-) (limited to 'include/linux') diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index d76adfea5df7..8f0f7c449305 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -414,6 +414,29 @@ void __init dmi_scan_machine(void) dmi_initialized = 1; } +/** + * dmi_matches - check if dmi_system_id structure matches system DMI data + * @dmi: pointer to the dmi_system_id structure to check + */ +static bool dmi_matches(const struct dmi_system_id *dmi) +{ + int i; + + WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); + + for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { + int s = dmi->matches[i].slot; + if (s == DMI_NONE) + continue; + if (dmi_ident[s] + && strstr(dmi_ident[s], dmi->matches[i].substr)) + continue; + /* No match */ + return false; + } + return true; +} + /** * dmi_check_system - check system DMI data * @list: array of dmi_system_id structures to match against @@ -429,31 +452,44 @@ void __init dmi_scan_machine(void) */ int dmi_check_system(const struct dmi_system_id *list) { - int i, count = 0; - const struct dmi_system_id *d = list; - - WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); - - while (d->ident) { - for (i = 0; i < ARRAY_SIZE(d->matches); i++) { - int s = d->matches[i].slot; - if (s == DMI_NONE) - continue; - if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr)) - continue; - /* No match */ - goto fail; + int count = 0; + const struct dmi_system_id *d; + + for (d = list; d->ident; d++) + if (dmi_matches(d)) { + count++; + if (d->callback && d->callback(d)) + break; } - count++; - if (d->callback && d->callback(d)) - break; -fail: d++; - } return count; } EXPORT_SYMBOL(dmi_check_system); +/** + * dmi_first_match - find dmi_system_id structure matching system DMI data + * @list: array of dmi_system_id structures to match against + * All non-null elements of the list must match + * their slot's (field index's) data (i.e., each + * list string must be a substring of the specified + * DMI slot's string data) to be considered a + * successful match. + * + * Walk the blacklist table until the first match is found. Return the + * pointer to the matching entry or NULL if there's no match. + */ +const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) +{ + const struct dmi_system_id *d; + + for (d = list; d->ident; d++) + if (dmi_matches(d)) + return d; + + return NULL; +} +EXPORT_SYMBOL(dmi_first_match); + /** * dmi_get_system_info - return DMI data value * @field: data index (see enum dmi_field) diff --git a/include/linux/dmi.h b/include/linux/dmi.h index 34161907b2f8..aea23105d3ed 100644 --- a/include/linux/dmi.h +++ b/include/linux/dmi.h @@ -38,6 +38,7 @@ struct dmi_device { #ifdef CONFIG_DMI extern int dmi_check_system(const struct dmi_system_id *list); +const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list); extern const char * dmi_get_system_info(int field); extern const struct dmi_device * dmi_find_device(int type, const char *name, const struct dmi_device *from); -- cgit v1.2.3 From 2a6e58d2731dcc05dafa7f976d935e0f0627fcd7 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 19 Jan 2009 20:56:43 +0100 Subject: SATA: Blacklisting of systems that spin off disks during ACPI power off Introduce new libata flags ATA_FLAG_NO_POWEROFF_SPINDOWN and ATA_FLAG_NO_HIBERNATE_SPINDOWN that, if set, will prevent disks from being spun off during system power off and hibernation, respectively (to handle the hibernation case we need the new system state SYSTEM_HIBERNATE_ENTER that can be checked against by libata, in analogy with SYSTEM_POWER_OFF). Signed-off-by: Rafael J. Wysocki Signed-off-by: Jeff Garzik --- drivers/ata/libata-scsi.c | 20 +++++++++++++++++--- include/linux/libata.h | 2 ++ 2 files changed, 19 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index a1a6e6298c33..3c4c5ae277ba 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -46,6 +46,7 @@ #include #include #include +#include #include "libata.h" @@ -1303,6 +1304,17 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ } else { + /* Some odd clown BIOSen issue spindown on power off (ACPI S4 + * or S5) causing some drives to spin up and down again. + */ + if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && + system_state == SYSTEM_POWER_OFF) + goto skip; + + if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && + system_entering_hibernation()) + goto skip; + /* XXX: This is for backward compatibility, will be * removed. Read Documentation/feature-removal-schedule.txt * for more info. @@ -1326,8 +1338,7 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) scmd->scsi_done = qc->scsidone; qc->scsidone = ata_delayed_done; } - scmd->result = SAM_STAT_GOOD; - return 1; + goto skip; } /* Issue ATA STANDBY IMMEDIATE command */ @@ -1343,10 +1354,13 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) return 0; -invalid_fld: + invalid_fld: ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); /* "Invalid field in cbd" */ return 1; + skip: + scmd->result = SAM_STAT_GOOD; + return 1; } diff --git a/include/linux/libata.h b/include/linux/libata.h index 2c6bd66209ff..bca3ba25f52a 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -187,6 +187,8 @@ enum { ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD * doesn't handle PIO interrupts */ ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ + ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ + ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ ATA_FLAG_DEBUGMSG = (1 << 13), ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ -- cgit v1.2.3 From 40413dcb7b273bda681dca38e6ff0bbb3728ef11 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Thu, 22 Jan 2009 01:58:36 +0300 Subject: Fix longstanding "error: storage size of '__mod_dmi_device_table' isn't known" gcc 3.4.6 doesn't like MODULE_DEVICE_TABLE(dmi, x) expansion enough to error out. Shut it up in a most simple way. Signed-off-by: Alexey Dobriyan Signed-off-by: Linus Torvalds --- include/linux/mod_devicetable.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index 97b91d1abb43..fde86671f48f 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -443,6 +443,13 @@ struct dmi_system_id { struct dmi_strmatch matches[4]; void *driver_data; }; +/* + * struct dmi_device_id appears during expansion of + * "MODULE_DEVICE_TABLE(dmi, x)". Compiler doesn't look inside it + * but this is enough for gcc 3.4.6 to error out: + * error: storage size of '__mod_dmi_device_table' isn't known + */ +#define dmi_device_id dmi_system_id #endif #define DMI_MATCH(a, b) { a, b } -- cgit v1.2.3 From 11e76ae0f3a82bbb6c06df8af2167af8b96a0584 Mon Sep 17 00:00:00 2001 From: Inaky Perez-Gonzalez Date: Thu, 8 Jan 2009 12:52:19 -0800 Subject: USB: add kernel-doc for wusb_dev in struct usb_device Reported by Randy Dunlap from a warning on the v2.6.29 merge window. Signed-off-by: Inaky Perez-Gonzalez Cc: David Vrabel Cc: Randy Dunlap Signed-off-by: Greg Kroah-Hartman --- include/linux/usb.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb.h b/include/linux/usb.h index 85ee9be9361e..88079fd60235 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -418,6 +418,8 @@ struct usb_tt; * @autosuspend_disabled: autosuspend disabled by the user * @autoresume_disabled: autoresume disabled by the user * @skip_sys_resume: skip the next system resume + * @wusb_dev: if this is a Wireless USB device, link to the WUSB + * specific data for the device. * * Notes: * Usbcore drivers should not set usbdev->state directly. Instead use -- cgit v1.2.3 From d8204ee2ad1c9babd7e33d4c118ec99a78a8442e Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Wed, 28 Jan 2009 00:07:20 -0600 Subject: dmi: Fix build breakage Commit d7b1956fed33d30c4815e848fd7a143722916868 ("DMI: Introduce dmi_first_match to make the interface more flexible") introduced compile errors like the following when !CONFIG_DMI drivers/ata/sata_sil.c: In function 'sil_broken_system_poweroff': drivers/ata/sata_sil.c:713: error: implicit declaration of function 'dmi_first_match' drivers/ata/sata_sil.c:713: warning: initialization makes pointer from integer without a cast We just need a dummy version of dmi_first_match() to fix this all up. Signed-off-by: Kumar Gala Signed-off-by: Linus Torvalds --- include/linux/dmi.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/dmi.h b/include/linux/dmi.h index aea23105d3ed..d741b9ceb0e0 100644 --- a/include/linux/dmi.h +++ b/include/linux/dmi.h @@ -65,6 +65,8 @@ static inline int dmi_walk(void (*decode)(const struct dmi_header *)) { return -1; } static inline bool dmi_match(enum dmi_field f, const char *str) { return false; } +static inline const struct dmi_system_id * + dmi_first_match(const struct dmi_system_id *list) { return NULL; } #endif -- cgit v1.2.3 From dc19835df6c47ff676ad6c98722d5e529db5d74c Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Thu, 29 Jan 2009 14:25:08 -0800 Subject: kprobes: fix module compilation error with CONFIG_KPROBES=n Define kprobes related data structures even if CONFIG_KPROBES is not set. This fixes compilation errors which occur if CONFIG_KPROBES is not set, in kprobe using modules. [akpm@linux-foundation.org: fix build for non-kprobes-supporting architectures] Reviewed-by: Ananth N Mavinakayanahalli Signed-off-by: Masami Hiramatsu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/kprobes.h | 47 ++++++++++++++++++++++++++--------------------- 1 file changed, 26 insertions(+), 21 deletions(-) (limited to 'include/linux') diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index d6ea19e314bb..32851eef48f0 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -49,6 +49,13 @@ /* Attach to insert probes on any functions which should be ignored*/ #define __kprobes __attribute__((__section__(".kprobes.text"))) notrace +#else /* CONFIG_KPROBES */ +typedef int kprobe_opcode_t; +struct arch_specific_insn { + int dummy; +}; +#define __kprobes notrace +#endif /* CONFIG_KPROBES */ struct kprobe; struct pt_regs; @@ -131,23 +138,6 @@ struct jprobe { /* For backward compatibility with old code using JPROBE_ENTRY() */ #define JPROBE_ENTRY(handler) (handler) -DECLARE_PER_CPU(struct kprobe *, current_kprobe); -DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk); - -#ifdef CONFIG_KRETPROBES -extern void arch_prepare_kretprobe(struct kretprobe_instance *ri, - struct pt_regs *regs); -extern int arch_trampoline_kprobe(struct kprobe *p); -#else /* CONFIG_KRETPROBES */ -static inline void arch_prepare_kretprobe(struct kretprobe *rp, - struct pt_regs *regs) -{ -} -static inline int arch_trampoline_kprobe(struct kprobe *p) -{ - return 0; -} -#endif /* CONFIG_KRETPROBES */ /* * Function-return probe - * Note: @@ -188,6 +178,25 @@ struct kprobe_blackpoint { unsigned long range; }; +#ifdef CONFIG_KPROBES +DECLARE_PER_CPU(struct kprobe *, current_kprobe); +DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk); + +#ifdef CONFIG_KRETPROBES +extern void arch_prepare_kretprobe(struct kretprobe_instance *ri, + struct pt_regs *regs); +extern int arch_trampoline_kprobe(struct kprobe *p); +#else /* CONFIG_KRETPROBES */ +static inline void arch_prepare_kretprobe(struct kretprobe *rp, + struct pt_regs *regs) +{ +} +static inline int arch_trampoline_kprobe(struct kprobe *p) +{ + return 0; +} +#endif /* CONFIG_KRETPROBES */ + extern struct kretprobe_blackpoint kretprobe_blacklist[]; static inline void kretprobe_assert(struct kretprobe_instance *ri, @@ -264,10 +273,6 @@ void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head); #else /* CONFIG_KPROBES */ -#define __kprobes notrace -struct jprobe; -struct kretprobe; - static inline struct kprobe *get_kprobe(void *addr) { return NULL; -- cgit v1.2.3 From e5d9a90c36e05dd080704ea58328c00f64facdc1 Mon Sep 17 00:00:00 2001 From: Ivan Kokshaysky Date: Thu, 29 Jan 2009 14:25:18 -0800 Subject: alpha: use syscall wrappers Convert OSF syscalls and add alpha specific SYSCALL_ALIAS() macro. Signed-off-by: Ivan Kokshaysky Cc: Richard Henderson Cc: Heiko Carstens Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/alpha/Kconfig | 1 + arch/alpha/kernel/entry.S | 2 +- arch/alpha/kernel/osf_sys.c | 113 ++++++++++++++++++++------------------------ arch/alpha/kernel/signal.c | 18 +++---- arch/alpha/kernel/systbls.S | 52 ++++++++++---------- include/linux/syscalls.h | 5 ++ 6 files changed, 92 insertions(+), 99 deletions(-) (limited to 'include/linux') diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 6110197757a3..9fb8aae5c391 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -8,6 +8,7 @@ config ALPHA select HAVE_AOUT select HAVE_IDE select HAVE_OPROFILE + select HAVE_SYSCALL_WRAPPERS help The Alpha is a 64-bit general-purpose processor designed and marketed by the Digital Equipment Corporation of blessed memory, diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S index aa2e50cf9857..e4a54b615894 100644 --- a/arch/alpha/kernel/entry.S +++ b/arch/alpha/kernel/entry.S @@ -933,7 +933,7 @@ sys_execve: osf_sigprocmask: .prologue 0 mov $sp, $18 - jmp $31, do_osf_sigprocmask + jmp $31, sys_osf_sigprocmask .end osf_sigprocmask .align 4 diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c index 18a3ea1aac51..ae41f097864b 100644 --- a/arch/alpha/kernel/osf_sys.c +++ b/arch/alpha/kernel/osf_sys.c @@ -54,8 +54,7 @@ extern int do_pipe(int *); * identical to OSF as we don't return 0 on success, but doing otherwise * would require changes to libc. Hopefully this is good enough. */ -asmlinkage unsigned long -osf_brk(unsigned long brk) +SYSCALL_DEFINE1(osf_brk, unsigned long, brk) { unsigned long retval = sys_brk(brk); if (brk && brk != retval) @@ -66,9 +65,9 @@ osf_brk(unsigned long brk) /* * This is pure guess-work.. */ -asmlinkage int -osf_set_program_attributes(unsigned long text_start, unsigned long text_len, - unsigned long bss_start, unsigned long bss_len) +SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start, + unsigned long, text_len, unsigned long, bss_start, + unsigned long, bss_len) { struct mm_struct *mm; @@ -146,9 +145,9 @@ Efault: return -EFAULT; } -asmlinkage int -osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent, - unsigned int count, long __user *basep) +SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd, + struct osf_dirent __user *, dirent, unsigned int, count, + long __user *, basep) { int error; struct file *file; @@ -177,9 +176,9 @@ osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent, #undef NAME_OFFSET -asmlinkage unsigned long -osf_mmap(unsigned long addr, unsigned long len, unsigned long prot, - unsigned long flags, unsigned long fd, unsigned long off) +SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, unsigned long, fd, + unsigned long, off) { struct file *file = NULL; unsigned long ret = -EBADF; @@ -254,8 +253,8 @@ do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer, return error; } -asmlinkage int -osf_statfs(char __user *pathname, struct osf_statfs __user *buffer, unsigned long bufsiz) +SYSCALL_DEFINE3(osf_statfs, char __user *, pathname, + struct osf_statfs __user *, buffer, unsigned long, bufsiz) { struct path path; int retval; @@ -268,8 +267,8 @@ osf_statfs(char __user *pathname, struct osf_statfs __user *buffer, unsigned lon return retval; } -asmlinkage int -osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz) +SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd, + struct osf_statfs __user *, buffer, unsigned long, bufsiz) { struct file *file; int retval; @@ -368,8 +367,8 @@ osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) return do_mount("", dirname, "proc", flags, NULL); } -asmlinkage int -osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data) +SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, char __user *, path, + int, flag, void __user *, data) { int retval = -EINVAL; char *name; @@ -399,8 +398,7 @@ osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data) return retval; } -asmlinkage int -osf_utsname(char __user *name) +SYSCALL_DEFINE1(osf_utsname, char __user *, name) { int error; @@ -423,14 +421,12 @@ osf_utsname(char __user *name) return error; } -asmlinkage unsigned long -sys_getpagesize(void) +SYSCALL_DEFINE0(getpagesize) { return PAGE_SIZE; } -asmlinkage unsigned long -sys_getdtablesize(void) +SYSCALL_DEFINE0(getdtablesize) { return sysctl_nr_open; } @@ -438,8 +434,7 @@ sys_getdtablesize(void) /* * For compatibility with OSF/1 only. Use utsname(2) instead. */ -asmlinkage int -osf_getdomainname(char __user *name, int namelen) +SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen) { unsigned len; int i; @@ -527,8 +522,8 @@ enum pl_code { PL_DEL = 5, PL_FDEL = 6 }; -asmlinkage long -osf_proplist_syscall(enum pl_code code, union pl_args __user *args) +SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code, + union pl_args __user *, args) { long error; int __user *min_buf_size_ptr; @@ -567,8 +562,8 @@ osf_proplist_syscall(enum pl_code code, union pl_args __user *args) return error; } -asmlinkage int -osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss) +SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss, + struct sigstack __user *, uoss) { unsigned long usp = rdusp(); unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; @@ -608,8 +603,7 @@ osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss) return error; } -asmlinkage long -osf_sysinfo(int command, char __user *buf, long count) +SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count) { char *sysinfo_table[] = { utsname()->sysname, @@ -647,9 +641,8 @@ osf_sysinfo(int command, char __user *buf, long count) return err; } -asmlinkage unsigned long -osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, - int __user *start, void __user *arg) +SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer, + unsigned long, nbytes, int __user *, start, void __user *, arg) { unsigned long w; struct percpu_struct *cpu; @@ -705,9 +698,8 @@ osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, return -EOPNOTSUPP; } -asmlinkage unsigned long -osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, - int __user *start, void __user *arg) +SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer, + unsigned long, nbytes, int __user *, start, void __user *, arg) { switch (op) { case SSI_IEEE_FP_CONTROL: { @@ -880,8 +872,8 @@ jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) value->tv_sec = jiffies / HZ; } -asmlinkage int -osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz) +SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv, + struct timezone __user *, tz) { if (tv) { struct timeval ktv; @@ -896,8 +888,8 @@ osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz) return 0; } -asmlinkage int -osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz) +SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, + struct timezone __user *, tz) { struct timespec kts; struct timezone ktz; @@ -916,8 +908,7 @@ osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz) return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); } -asmlinkage int -osf_getitimer(int which, struct itimerval32 __user *it) +SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) { struct itimerval kit; int error; @@ -929,8 +920,8 @@ osf_getitimer(int which, struct itimerval32 __user *it) return error; } -asmlinkage int -osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out) +SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, + struct itimerval32 __user *, out) { struct itimerval kin, kout; int error; @@ -952,8 +943,8 @@ osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __use } -asmlinkage int -osf_utimes(char __user *filename, struct timeval32 __user *tvs) +SYSCALL_DEFINE2(osf_utimes, char __user *, filename, + struct timeval32 __user *, tvs) { struct timespec tv[2]; @@ -979,9 +970,8 @@ osf_utimes(char __user *filename, struct timeval32 __user *tvs) #define MAX_SELECT_SECONDS \ ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) -asmlinkage int -osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, - struct timeval32 __user *tvp) +SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp, + fd_set __user *, exp, struct timeval32 __user *, tvp) { struct timespec end_time, *to = NULL; if (tvp) { @@ -1026,8 +1016,7 @@ struct rusage32 { long ru_nivcsw; /* involuntary " */ }; -asmlinkage int -osf_getrusage(int who, struct rusage32 __user *ru) +SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru) { struct rusage32 r; @@ -1053,9 +1042,8 @@ osf_getrusage(int who, struct rusage32 __user *ru) return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; } -asmlinkage long -osf_wait4(pid_t pid, int __user *ustatus, int options, - struct rusage32 __user *ur) +SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options, + struct rusage32 __user *, ur) { struct rusage r; long ret, err; @@ -1101,8 +1089,8 @@ osf_wait4(pid_t pid, int __user *ustatus, int options, * seems to be a timeval pointer, and I suspect the second * one is the time remaining.. Ho humm.. No documentation. */ -asmlinkage int -osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain) +SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep, + struct timeval32 __user *, remain) { struct timeval tmp; unsigned long ticks; @@ -1155,8 +1143,7 @@ struct timex32 { int :32; int :32; int :32; int :32; }; -asmlinkage int -sys_old_adjtimex(struct timex32 __user *txc_p) +SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p) { struct timex txc; int ret; @@ -1267,8 +1254,8 @@ osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) return 0; } -asmlinkage ssize_t -osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count) +SYSCALL_DEFINE3(osf_readv, unsigned long, fd, + const struct iovec __user *, vector, unsigned long, count) { if (unlikely(personality(current->personality) == PER_OSF4)) if (osf_fix_iov_len(vector, count)) @@ -1276,8 +1263,8 @@ osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long co return sys_readv(fd, vector, count); } -asmlinkage ssize_t -osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count) +SYSCALL_DEFINE3(osf_writev, unsigned long, fd, + const struct iovec __user *, vector, unsigned long, count) { if (unlikely(personality(current->personality) == PER_OSF4)) if (osf_fix_iov_len(vector, count)) diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c index 410af4f3140e..df65eaa84c4c 100644 --- a/arch/alpha/kernel/signal.c +++ b/arch/alpha/kernel/signal.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -51,8 +52,8 @@ static void do_signal(struct pt_regs *, struct switch_stack *, * Note that we don't need to acquire the kernel lock for SMP * operation, as all of this is local to this thread. */ -asmlinkage unsigned long -do_osf_sigprocmask(int how, unsigned long newmask, struct pt_regs *regs) +SYSCALL_DEFINE3(osf_sigprocmask, int, how, unsigned long, newmask, + struct pt_regs *, regs) { unsigned long oldmask = -EINVAL; @@ -81,9 +82,9 @@ do_osf_sigprocmask(int how, unsigned long newmask, struct pt_regs *regs) return oldmask; } -asmlinkage int -osf_sigaction(int sig, const struct osf_sigaction __user *act, - struct osf_sigaction __user *oact) +SYSCALL_DEFINE3(osf_sigaction, int, sig, + const struct osf_sigaction __user *, act, + struct osf_sigaction __user *, oact) { struct k_sigaction new_ka, old_ka; int ret; @@ -112,10 +113,9 @@ osf_sigaction(int sig, const struct osf_sigaction __user *act, return ret; } -asmlinkage long -sys_rt_sigaction(int sig, const struct sigaction __user *act, - struct sigaction __user *oact, - size_t sigsetsize, void __user *restorer) +SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act, + struct sigaction __user *, oact, + size_t, sigsetsize, void __user *, restorer) { struct k_sigaction new_ka, old_ka; int ret; diff --git a/arch/alpha/kernel/systbls.S b/arch/alpha/kernel/systbls.S index 9d9e3a98bb95..95c9aef1c106 100644 --- a/arch/alpha/kernel/systbls.S +++ b/arch/alpha/kernel/systbls.S @@ -17,7 +17,7 @@ sys_call_table: .quad sys_write .quad alpha_ni_syscall /* 5 */ .quad sys_close - .quad osf_wait4 + .quad sys_osf_wait4 .quad alpha_ni_syscall .quad sys_link .quad sys_unlink /* 10 */ @@ -27,11 +27,11 @@ sys_call_table: .quad sys_mknod .quad sys_chmod /* 15 */ .quad sys_chown - .quad osf_brk + .quad sys_osf_brk .quad alpha_ni_syscall .quad sys_lseek .quad sys_getxpid /* 20 */ - .quad osf_mount + .quad sys_osf_mount .quad sys_umount .quad sys_setuid .quad sys_getxuid @@ -53,7 +53,7 @@ sys_call_table: .quad alpha_ni_syscall /* 40 */ .quad sys_dup .quad sys_alpha_pipe - .quad osf_set_program_attributes + .quad sys_osf_set_program_attributes .quad alpha_ni_syscall .quad sys_open /* 45 */ .quad alpha_ni_syscall @@ -81,7 +81,7 @@ sys_call_table: .quad sys_newlstat .quad alpha_ni_syscall .quad alpha_ni_syscall /* 70 */ - .quad osf_mmap + .quad sys_osf_mmap .quad alpha_ni_syscall .quad sys_munmap .quad sys_mprotect @@ -94,17 +94,17 @@ sys_call_table: .quad sys_setgroups /* 80 */ .quad alpha_ni_syscall .quad sys_setpgid - .quad osf_setitimer + .quad sys_osf_setitimer .quad alpha_ni_syscall .quad alpha_ni_syscall /* 85 */ - .quad osf_getitimer + .quad sys_osf_getitimer .quad sys_gethostname .quad sys_sethostname .quad sys_getdtablesize .quad sys_dup2 /* 90 */ .quad sys_newfstat .quad sys_fcntl - .quad osf_select + .quad sys_osf_select .quad sys_poll .quad sys_fsync /* 95 */ .quad sys_setpriority @@ -123,22 +123,22 @@ sys_call_table: .quad alpha_ni_syscall .quad alpha_ni_syscall /* 110 */ .quad sys_sigsuspend - .quad osf_sigstack + .quad sys_osf_sigstack .quad sys_recvmsg .quad sys_sendmsg .quad alpha_ni_syscall /* 115 */ - .quad osf_gettimeofday - .quad osf_getrusage + .quad sys_osf_gettimeofday + .quad sys_osf_getrusage .quad sys_getsockopt .quad alpha_ni_syscall #ifdef CONFIG_OSF4_COMPAT - .quad osf_readv /* 120 */ - .quad osf_writev + .quad sys_osf_readv /* 120 */ + .quad sys_osf_writev #else .quad sys_readv /* 120 */ .quad sys_writev #endif - .quad osf_settimeofday + .quad sys_osf_settimeofday .quad sys_fchown .quad sys_fchmod .quad sys_recvfrom /* 125 */ @@ -154,7 +154,7 @@ sys_call_table: .quad sys_socketpair /* 135 */ .quad sys_mkdir .quad sys_rmdir - .quad osf_utimes + .quad sys_osf_utimes .quad alpha_ni_syscall .quad alpha_ni_syscall /* 140 */ .quad sys_getpeername @@ -172,16 +172,16 @@ sys_call_table: .quad alpha_ni_syscall .quad alpha_ni_syscall .quad alpha_ni_syscall /* 155 */ - .quad osf_sigaction + .quad sys_osf_sigaction .quad alpha_ni_syscall .quad alpha_ni_syscall - .quad osf_getdirentries - .quad osf_statfs /* 160 */ - .quad osf_fstatfs + .quad sys_osf_getdirentries + .quad sys_osf_statfs /* 160 */ + .quad sys_osf_fstatfs .quad alpha_ni_syscall .quad alpha_ni_syscall .quad alpha_ni_syscall - .quad osf_getdomainname /* 165 */ + .quad sys_osf_getdomainname /* 165 */ .quad sys_setdomainname .quad alpha_ni_syscall .quad alpha_ni_syscall @@ -224,7 +224,7 @@ sys_call_table: .quad sys_semctl .quad sys_semget /* 205 */ .quad sys_semop - .quad osf_utsname + .quad sys_osf_utsname .quad sys_lchown .quad sys_shmat .quad sys_shmctl /* 210 */ @@ -258,23 +258,23 @@ sys_call_table: .quad alpha_ni_syscall .quad alpha_ni_syscall .quad alpha_ni_syscall /* 240 */ - .quad osf_sysinfo + .quad sys_osf_sysinfo .quad alpha_ni_syscall .quad alpha_ni_syscall - .quad osf_proplist_syscall + .quad sys_osf_proplist_syscall .quad alpha_ni_syscall /* 245 */ .quad alpha_ni_syscall .quad alpha_ni_syscall .quad alpha_ni_syscall .quad alpha_ni_syscall .quad alpha_ni_syscall /* 250 */ - .quad osf_usleep_thread + .quad sys_osf_usleep_thread .quad alpha_ni_syscall .quad alpha_ni_syscall .quad sys_sysfs .quad alpha_ni_syscall /* 255 */ - .quad osf_getsysinfo - .quad osf_setsysinfo + .quad sys_osf_getsysinfo + .quad sys_osf_setsysinfo .quad alpha_ni_syscall .quad alpha_ni_syscall .quad alpha_ni_syscall /* 260 */ diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 16875f89e6a7..0eda02ff2414 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -108,9 +108,14 @@ struct old_linux_dirent; asm ("\t.globl " #alias "\n\t.set " #alias ", " #name "\n" \ "\t.globl ." #alias "\n\t.set ." #alias ", ." #name) #else +#ifdef CONFIG_ALPHA +#define SYSCALL_ALIAS(alias, name) \ + asm ( #alias " = " #name "\n\t.globl " #alias) +#else #define SYSCALL_ALIAS(alias, name) \ asm ("\t.globl " #alias "\n\t.set " #alias ", " #name) #endif +#endif #ifdef CONFIG_HAVE_SYSCALL_WRAPPERS -- cgit v1.2.3 From 804b3c28a4e4fa1c224571bf76edb534b9c4b1ed Mon Sep 17 00:00:00 2001 From: Paul Menage Date: Thu, 29 Jan 2009 14:25:21 -0800 Subject: cgroups: add cpu_relax() calls in css_tryget() and cgroup_clear_css_refs() css_tryget() and cgroup_clear_css_refs() contain polling loops; these loops should have cpu_relax calls in them to reduce cross-cache traffic. Signed-off-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/cgroup.h | 1 + kernel/cgroup.c | 7 +++++-- 2 files changed, 6 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index e267e62827bb..e4e8e117d27d 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -99,6 +99,7 @@ static inline bool css_tryget(struct cgroup_subsys_state *css) while (!atomic_inc_not_zero(&css->refcnt)) { if (test_bit(CSS_REMOVED, &css->flags)) return false; + cpu_relax(); } return true; } diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 0066092de19a..492215d67fa5 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2509,7 +2509,7 @@ static int cgroup_clear_css_refs(struct cgroup *cgrp) for_each_subsys(cgrp->root, ss) { struct cgroup_subsys_state *css = cgrp->subsys[ss->subsys_id]; int refcnt; - do { + while (1) { /* We can only remove a CSS with a refcnt==1 */ refcnt = atomic_read(&css->refcnt); if (refcnt > 1) { @@ -2523,7 +2523,10 @@ static int cgroup_clear_css_refs(struct cgroup *cgrp) * css_tryget() to spin until we set the * CSS_REMOVED bits or abort */ - } while (atomic_cmpxchg(&css->refcnt, refcnt, 0) != refcnt); + if (atomic_cmpxchg(&css->refcnt, refcnt, 0) == refcnt) + break; + cpu_relax(); + } } done: for_each_subsys(cgrp->root, ss) { -- cgit v1.2.3 From 9df04e1f25effde823a600e755b51475d438f56b Mon Sep 17 00:00:00 2001 From: Davide Libenzi Date: Thu, 29 Jan 2009 14:25:26 -0800 Subject: epoll: drop max_user_instances and rely only on max_user_watches Linus suggested to put limits where the money is, and max_user_watches already does that w/out the need of max_user_instances. That has the advantage to mitigate the potential DoS while allowing pretty generous default behavior. Allowing top 4% of low memory (per user) to be allocated in epoll watches, we have: LOMEM MAX_WATCHES (per user) 512MB ~178000 1GB ~356000 2GB ~712000 A box with 512MB of lomem, will meet some challenge in hitting 180K watches, socket buffers math teaches us. No more max_user_instances limits then. Signed-off-by: Davide Libenzi Cc: Willy Tarreau Cc: Michael Kerrisk Cc: Bron Gondwana Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/eventpoll.c | 22 ++++------------------ include/linux/sched.h | 1 - 2 files changed, 4 insertions(+), 19 deletions(-) (limited to 'include/linux') diff --git a/fs/eventpoll.c b/fs/eventpoll.c index ba2f9ec71192..011b9b8c90c6 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -234,8 +234,6 @@ struct ep_pqueue { /* * Configuration options available inside /proc/sys/fs/epoll/ */ -/* Maximum number of epoll devices, per user */ -static int max_user_instances __read_mostly; /* Maximum number of epoll watched descriptors, per user */ static int max_user_watches __read_mostly; @@ -260,14 +258,6 @@ static struct kmem_cache *pwq_cache __read_mostly; static int zero; ctl_table epoll_table[] = { - { - .procname = "max_user_instances", - .data = &max_user_instances, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec_minmax, - .extra1 = &zero, - }, { .procname = "max_user_watches", .data = &max_user_watches, @@ -491,7 +481,6 @@ static void ep_free(struct eventpoll *ep) mutex_unlock(&epmutex); mutex_destroy(&ep->mtx); - atomic_dec(&ep->user->epoll_devs); free_uid(ep->user); kfree(ep); } @@ -581,10 +570,6 @@ static int ep_alloc(struct eventpoll **pep) struct eventpoll *ep; user = get_current_user(); - error = -EMFILE; - if (unlikely(atomic_read(&user->epoll_devs) >= - max_user_instances)) - goto free_uid; error = -ENOMEM; ep = kzalloc(sizeof(*ep), GFP_KERNEL); if (unlikely(!ep)) @@ -1141,7 +1126,6 @@ SYSCALL_DEFINE1(epoll_create1, int, flags) flags & O_CLOEXEC); if (fd < 0) ep_free(ep); - atomic_inc(&ep->user->epoll_devs); error_return: DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n", @@ -1366,8 +1350,10 @@ static int __init eventpoll_init(void) struct sysinfo si; si_meminfo(&si); - max_user_instances = 128; - max_user_watches = (((si.totalram - si.totalhigh) / 32) << PAGE_SHIFT) / + /* + * Allows top 4% of lomem to be allocated for epoll watches (per user). + */ + max_user_watches = (((si.totalram - si.totalhigh) / 25) << PAGE_SHIFT) / EP_ITEM_COST; /* Initialize the structure used to perform safe poll wait head wake ups */ diff --git a/include/linux/sched.h b/include/linux/sched.h index 02e16d207304..5a7c76388731 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -630,7 +630,6 @@ struct user_struct { atomic_t inotify_devs; /* How many inotify devs does this user have opened? */ #endif #ifdef CONFIG_EPOLL - atomic_t epoll_devs; /* The number of epoll descriptors currently open */ atomic_t epoll_watches; /* The number of file descriptors currently watched */ #endif #ifdef CONFIG_POSIX_MQUEUE -- cgit v1.2.3