diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 120 | ||||
| -rw-r--r-- | init/do_mounts.c | 49 | ||||
| -rw-r--r-- | init/initramfs.c | 8 |
3 files changed, 101 insertions, 76 deletions
diff --git a/init/Kconfig b/init/Kconfig index b4daad2bac23..a34064a031a5 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -104,29 +104,9 @@ config COMPILE_TEST here. If you are a user/distributor, say N here to exclude useless drivers to be distributed. -config HEADER_TEST - bool "Compile test headers that should be standalone compilable" - help - Compile test headers listed in header-test-y target to ensure they are - self-contained, i.e. compilable as standalone units. - - If you are a developer or tester and want to ensure the requested - headers are self-contained, say Y here. Otherwise, choose N. - -config KERNEL_HEADER_TEST - bool "Compile test kernel headers" - depends on HEADER_TEST - help - Headers in include/ are used to build external moduls. - Compile test them to ensure they are self-contained, i.e. - compilable as standalone units. - - If you are a developer or tester and want to ensure the headers - in include/ are self-contained, say Y here. Otherwise, choose N. - config UAPI_HEADER_TEST bool "Compile test UAPI headers" - depends on HEADER_TEST && HEADERS_INSTALL && CC_CAN_LINK + depends on HEADERS_INSTALL && CC_CAN_LINK help Compile test headers exported to user-space to ensure they are self-contained, i.e. compilable as standalone units. @@ -166,13 +146,13 @@ config LOCALVERSION_AUTO which is done within the script "scripts/setlocalversion".) config BUILD_SALT - string "Build ID Salt" - default "" - help - The build ID is used to link binaries and their debug info. Setting - this option will use the value in the calculation of the build id. - This is mostly useful for distributions which want to ensure the - build is unique between builds. It's safe to leave the default. + string "Build ID Salt" + default "" + help + The build ID is used to link binaries and their debug info. Setting + this option will use the value in the calculation of the build id. + This is mostly useful for distributions which want to ensure the + build is unique between builds. It's safe to leave the default. config HAVE_KERNEL_GZIP bool @@ -785,6 +765,10 @@ config ARCH_SUPPORTS_NUMA_BALANCING config ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH bool +config CC_HAS_INT128 + def_bool y + depends on !$(cc-option,-D__SIZEOF_INT128__=0) + # # For architectures that know their GCC __int128 support is sound # @@ -834,7 +818,7 @@ menuconfig CGROUPS if CGROUPS config PAGE_COUNTER - bool + bool config MEMCG bool "Memory controller" @@ -1327,9 +1311,9 @@ menuconfig EXPERT select DEBUG_KERNEL help This option allows certain base kernel options and settings - to be disabled or tweaked. This is for specialized - environments which can tolerate a "non-standard" kernel. - Only use this if you really know what you are doing. + to be disabled or tweaked. This is for specialized + environments which can tolerate a "non-standard" kernel. + Only use this if you really know what you are doing. config UID16 bool "Enable 16-bit UID system calls" if EXPERT @@ -1372,23 +1356,6 @@ config SYSFS_SYSCALL If unsure say Y here. -config SYSCTL_SYSCALL - bool "Sysctl syscall support" if EXPERT - depends on PROC_SYSCTL - default n - select SYSCTL - ---help--- - sys_sysctl uses binary paths that have been found challenging - to properly maintain and use. The interface in /proc/sys - using paths with ascii names is now the primary path to this - information. - - Almost nothing using the binary sysctl interface so if you are - trying to save some space it is probably safe to disable this, - making your kernel marginally smaller. - - If unsure say N here. - config FHANDLE bool "open by fhandle syscalls" if EXPERT select EXPORTFS @@ -1439,11 +1406,11 @@ config BUG bool "BUG() support" if EXPERT default y help - Disabling this option eliminates support for BUG and WARN, reducing - the size of your kernel image and potentially quietly ignoring - numerous fatal conditions. You should only consider disabling this - option for embedded systems with no facilities for reporting errors. - Just say Y. + Disabling this option eliminates support for BUG and WARN, reducing + the size of your kernel image and potentially quietly ignoring + numerous fatal conditions. You should only consider disabling this + option for embedded systems with no facilities for reporting errors. + Just say Y. config ELF_CORE depends on COREDUMP @@ -1459,8 +1426,8 @@ config PCSPKR_PLATFORM select I8253_LOCK default y help - This option allows to disable the internal PC-Speaker - support, saving some memory. + This option allows to disable the internal PC-Speaker + support, saving some memory. config BASE_FULL default y @@ -1548,6 +1515,7 @@ config AIO config IO_URING bool "Enable IO uring support" if EXPERT select ANON_INODES + select IO_WQ default y help This option enables support for the io_uring interface, enabling @@ -1577,29 +1545,29 @@ config MEMBARRIER If unsure, say Y. config KALLSYMS - bool "Load all symbols for debugging/ksymoops" if EXPERT - default y - help - Say Y here to let the kernel print out symbolic crash information and - symbolic stack backtraces. This increases the size of the kernel - somewhat, as all symbols have to be loaded into the kernel image. + bool "Load all symbols for debugging/ksymoops" if EXPERT + default y + help + Say Y here to let the kernel print out symbolic crash information and + symbolic stack backtraces. This increases the size of the kernel + somewhat, as all symbols have to be loaded into the kernel image. config KALLSYMS_ALL bool "Include all symbols in kallsyms" depends on DEBUG_KERNEL && KALLSYMS help - Normally kallsyms only contains the symbols of functions for nicer - OOPS messages and backtraces (i.e., symbols from the text and inittext - sections). This is sufficient for most cases. And only in very rare - cases (e.g., when a debugger is used) all symbols are required (e.g., - names of variables from the data sections, etc). + Normally kallsyms only contains the symbols of functions for nicer + OOPS messages and backtraces (i.e., symbols from the text and inittext + sections). This is sufficient for most cases. And only in very rare + cases (e.g., when a debugger is used) all symbols are required (e.g., + names of variables from the data sections, etc). - This option makes sure that all symbols are loaded into the kernel - image (i.e., symbols from all sections) in cost of increased kernel - size (depending on the kernel configuration, it may be 300KiB or - something like this). + This option makes sure that all symbols are loaded into the kernel + image (i.e., symbols from all sections) in cost of increased kernel + size (depending on the kernel configuration, it may be 300KiB or + something like this). - Say N unless you really need all symbols. + Say N unless you really need all symbols. config KALLSYMS_ABSOLUTE_PERCPU bool @@ -1742,12 +1710,12 @@ config DEBUG_PERF_USE_VMALLOC depends on PERF_EVENTS && DEBUG_KERNEL && !PPC select PERF_USE_VMALLOC help - Use vmalloc memory to back perf mmap() buffers. + Use vmalloc memory to back perf mmap() buffers. - Mostly useful for debugging the vmalloc code on platforms - that don't require it. + Mostly useful for debugging the vmalloc code on platforms + that don't require it. - Say N if unsure. + Say N if unsure. endmenu diff --git a/init/do_mounts.c b/init/do_mounts.c index 9634ecf3743d..af9cda887a23 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -212,6 +212,7 @@ static int match_dev_by_label(struct device *dev, const void *data) * a colon. * 9) PARTLABEL=<name> with name being the GPT partition label. * MSDOS partitions do not support labels! + * 10) /dev/cifs represents Root_CIFS (0xfe) * * If name doesn't have fall into the categories above, we return (0,0). * block_class is used to check if something is a disk name. If the disk @@ -268,6 +269,9 @@ dev_t name_to_dev_t(const char *name) res = Root_NFS; if (strcmp(name, "nfs") == 0) goto done; + res = Root_CIFS; + if (strcmp(name, "cifs") == 0) + goto done; res = Root_RAM0; if (strcmp(name, "ram") == 0) goto done; @@ -501,6 +505,42 @@ static int __init mount_nfs_root(void) } #endif +#ifdef CONFIG_CIFS_ROOT + +extern int cifs_root_data(char **dev, char **opts); + +#define CIFSROOT_TIMEOUT_MIN 5 +#define CIFSROOT_TIMEOUT_MAX 30 +#define CIFSROOT_RETRY_MAX 5 + +static int __init mount_cifs_root(void) +{ + char *root_dev, *root_data; + unsigned int timeout; + int try, err; + + err = cifs_root_data(&root_dev, &root_data); + if (err != 0) + return 0; + + timeout = CIFSROOT_TIMEOUT_MIN; + for (try = 1; ; try++) { + err = do_mount_root(root_dev, "cifs", root_mountflags, + root_data); + if (err == 0) + return 1; + if (try > CIFSROOT_RETRY_MAX) + break; + + ssleep(timeout); + timeout <<= 1; + if (timeout > CIFSROOT_TIMEOUT_MAX) + timeout = CIFSROOT_TIMEOUT_MAX; + } + return 0; +} +#endif + #if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD) void __init change_floppy(char *fmt, ...) { @@ -542,6 +582,15 @@ void __init mount_root(void) ROOT_DEV = Root_FD0; } #endif +#ifdef CONFIG_CIFS_ROOT + if (ROOT_DEV == Root_CIFS) { + if (mount_cifs_root()) + return; + + printk(KERN_ERR "VFS: Unable to mount root fs via SMB, trying floppy.\n"); + ROOT_DEV = Root_FD0; + } +#endif #ifdef CONFIG_BLK_DEV_FD if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) { /* rd_doload is 2 for a dual initrd/ramload setup */ diff --git a/init/initramfs.c b/init/initramfs.c index c47dad0884f7..8ec1be4d7d51 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -10,6 +10,7 @@ #include <linux/syscalls.h> #include <linux/utime.h> #include <linux/file.h> +#include <linux/memblock.h> static ssize_t __init xwrite(int fd, const char *p, size_t count) { @@ -529,6 +530,13 @@ extern unsigned long __initramfs_size; void __weak free_initrd_mem(unsigned long start, unsigned long end) { +#ifdef CONFIG_ARCH_KEEP_MEMBLOCK + unsigned long aligned_start = ALIGN_DOWN(start, PAGE_SIZE); + unsigned long aligned_end = ALIGN(end, PAGE_SIZE); + + memblock_free(__pa(aligned_start), aligned_end - aligned_start); +#endif + free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM, "initrd"); } |