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author | Ingo Molnar <mingo@kernel.org> | 2015-08-25 10:59:19 +0300 |
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committer | Ingo Molnar <mingo@kernel.org> | 2015-08-25 10:59:19 +0300 |
commit | 8d58b66ed2b000f27658c88a4ed70e8042e86a58 (patch) | |
tree | 5bae2c74f932b5d863f72cb698a6f71260340b26 /arch/avr32 | |
parent | 13fe86f465b72fc9328d4f5ebc33223c011852ae (diff) | |
parent | c13dcf9f2d6f5f06ef1bf79ec456df614c5e058b (diff) | |
download | linux-8d58b66ed2b000f27658c88a4ed70e8042e86a58.tar.xz |
Merge tag 'v4.2-rc8' into x86/mm, before applying new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/avr32')
-rw-r--r-- | arch/avr32/include/asm/Kbuild | 2 | ||||
-rw-r--r-- | arch/avr32/include/asm/cmpxchg.h | 2 | ||||
-rw-r--r-- | arch/avr32/include/asm/dma-mapping.h | 19 | ||||
-rw-r--r-- | arch/avr32/include/asm/uaccess.h | 12 | ||||
-rw-r--r-- | arch/avr32/kernel/time.c | 65 | ||||
-rw-r--r-- | arch/avr32/mach-at32ap/clock.c | 20 | ||||
-rw-r--r-- | arch/avr32/mach-at32ap/extint.c | 3 | ||||
-rw-r--r-- | arch/avr32/mm/fault.c | 4 |
8 files changed, 74 insertions, 53 deletions
diff --git a/arch/avr32/include/asm/Kbuild b/arch/avr32/include/asm/Kbuild index 528d70d47a54..f61f2dd67464 100644 --- a/arch/avr32/include/asm/Kbuild +++ b/arch/avr32/include/asm/Kbuild @@ -12,10 +12,10 @@ generic-y += irq_work.h generic-y += local.h generic-y += local64.h generic-y += mcs_spinlock.h +generic-y += mm-arch-hooks.h generic-y += param.h generic-y += percpu.h generic-y += preempt.h -generic-y += scatterlist.h generic-y += sections.h generic-y += topology.h generic-y += trace_clock.h diff --git a/arch/avr32/include/asm/cmpxchg.h b/arch/avr32/include/asm/cmpxchg.h index 962a6aeab787..366bbeaeb405 100644 --- a/arch/avr32/include/asm/cmpxchg.h +++ b/arch/avr32/include/asm/cmpxchg.h @@ -70,8 +70,6 @@ extern unsigned long __cmpxchg_u64_unsupported_on_32bit_kernels( if something tries to do an invalid cmpxchg(). */ extern void __cmpxchg_called_with_bad_pointer(void); -#define __HAVE_ARCH_CMPXCHG 1 - static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) { diff --git a/arch/avr32/include/asm/dma-mapping.h b/arch/avr32/include/asm/dma-mapping.h index b3d18f9f3e8d..ae7ac9205d20 100644 --- a/arch/avr32/include/asm/dma-mapping.h +++ b/arch/avr32/include/asm/dma-mapping.h @@ -209,17 +209,18 @@ dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, * the same here. */ static inline int -dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, +dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) { int i; + struct scatterlist *sg; - for (i = 0; i < nents; i++) { + for_each_sg(sglist, sg, nents, i) { char *virt; - sg[i].dma_address = page_to_bus(sg_page(&sg[i])) + sg[i].offset; - virt = sg_virt(&sg[i]); - dma_cache_sync(dev, virt, sg[i].length, direction); + sg->dma_address = page_to_bus(sg_page(sg)) + sg->offset; + virt = sg_virt(sg); + dma_cache_sync(dev, virt, sg->length, direction); } return nents; @@ -321,14 +322,14 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, } static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, +dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) { int i; + struct scatterlist *sg; - for (i = 0; i < nents; i++) { - dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, direction); - } + for_each_sg(sglist, sg, nents, i) + dma_cache_sync(dev, sg_virt(sg), sg->length, direction); } /* Now for the API extensions over the pci_ one */ diff --git a/arch/avr32/include/asm/uaccess.h b/arch/avr32/include/asm/uaccess.h index a46f7cf3e1ea..68cf638faf48 100644 --- a/arch/avr32/include/asm/uaccess.h +++ b/arch/avr32/include/asm/uaccess.h @@ -97,7 +97,8 @@ static inline __kernel_size_t __copy_from_user(void *to, * @x: Value to copy to user space. * @ptr: Destination address, in user space. * - * Context: User context only. This function may sleep. + * Context: User context only. This function may sleep if pagefaults are + * enabled. * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger @@ -116,7 +117,8 @@ static inline __kernel_size_t __copy_from_user(void *to, * @x: Variable to store result. * @ptr: Source address, in user space. * - * Context: User context only. This function may sleep. + * Context: User context only. This function may sleep if pagefaults are + * enabled. * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger @@ -136,7 +138,8 @@ static inline __kernel_size_t __copy_from_user(void *to, * @x: Value to copy to user space. * @ptr: Destination address, in user space. * - * Context: User context only. This function may sleep. + * Context: User context only. This function may sleep if pagefaults are + * enabled. * * This macro copies a single simple value from kernel space to user * space. It supports simple types like char and int, but not larger @@ -158,7 +161,8 @@ static inline __kernel_size_t __copy_from_user(void *to, * @x: Variable to store result. * @ptr: Source address, in user space. * - * Context: User context only. This function may sleep. + * Context: User context only. This function may sleep if pagefaults are + * enabled. * * This macro copies a single simple variable from user space to kernel * space. It supports simple types like char and int, but not larger diff --git a/arch/avr32/kernel/time.c b/arch/avr32/kernel/time.c index d0f771be9e96..a124c55733db 100644 --- a/arch/avr32/kernel/time.c +++ b/arch/avr32/kernel/time.c @@ -18,6 +18,7 @@ #include <mach/pm.h> +static bool disable_cpu_idle_poll; static cycle_t read_cycle_count(struct clocksource *cs) { @@ -80,45 +81,45 @@ static int comparator_next_event(unsigned long delta, return 0; } -static void comparator_mode(enum clock_event_mode mode, - struct clock_event_device *evdev) +static int comparator_shutdown(struct clock_event_device *evdev) { - switch (mode) { - case CLOCK_EVT_MODE_ONESHOT: - pr_debug("%s: start\n", evdev->name); - /* FALLTHROUGH */ - case CLOCK_EVT_MODE_RESUME: + pr_debug("%s: %s\n", __func__, evdev->name); + sysreg_write(COMPARE, 0); + + if (disable_cpu_idle_poll) { + disable_cpu_idle_poll = false; /* - * If we're using the COUNT and COMPARE registers we - * need to force idle poll. + * Only disable idle poll if we have forced that + * in a previous call. */ - cpu_idle_poll_ctrl(true); - break; - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_SHUTDOWN: - sysreg_write(COMPARE, 0); - pr_debug("%s: stop\n", evdev->name); - if (evdev->mode == CLOCK_EVT_MODE_ONESHOT || - evdev->mode == CLOCK_EVT_MODE_RESUME) { - /* - * Only disable idle poll if we have forced that - * in a previous call. - */ - cpu_idle_poll_ctrl(false); - } - break; - default: - BUG(); + cpu_idle_poll_ctrl(false); } + return 0; +} + +static int comparator_set_oneshot(struct clock_event_device *evdev) +{ + pr_debug("%s: %s\n", __func__, evdev->name); + + disable_cpu_idle_poll = true; + /* + * If we're using the COUNT and COMPARE registers we + * need to force idle poll. + */ + cpu_idle_poll_ctrl(true); + + return 0; } static struct clock_event_device comparator = { - .name = "avr32_comparator", - .features = CLOCK_EVT_FEAT_ONESHOT, - .shift = 16, - .rating = 50, - .set_next_event = comparator_next_event, - .set_mode = comparator_mode, + .name = "avr32_comparator", + .features = CLOCK_EVT_FEAT_ONESHOT, + .shift = 16, + .rating = 50, + .set_next_event = comparator_next_event, + .set_state_shutdown = comparator_shutdown, + .set_state_oneshot = comparator_set_oneshot, + .tick_resume = comparator_set_oneshot, }; void read_persistent_clock(struct timespec *ts) diff --git a/arch/avr32/mach-at32ap/clock.c b/arch/avr32/mach-at32ap/clock.c index 23b1a97fae7a..52c179bec0cc 100644 --- a/arch/avr32/mach-at32ap/clock.c +++ b/arch/avr32/mach-at32ap/clock.c @@ -80,6 +80,9 @@ int clk_enable(struct clk *clk) { unsigned long flags; + if (!clk) + return 0; + spin_lock_irqsave(&clk_lock, flags); __clk_enable(clk); spin_unlock_irqrestore(&clk_lock, flags); @@ -106,6 +109,9 @@ void clk_disable(struct clk *clk) { unsigned long flags; + if (IS_ERR_OR_NULL(clk)) + return; + spin_lock_irqsave(&clk_lock, flags); __clk_disable(clk); spin_unlock_irqrestore(&clk_lock, flags); @@ -117,6 +123,9 @@ unsigned long clk_get_rate(struct clk *clk) unsigned long flags; unsigned long rate; + if (!clk) + return 0; + spin_lock_irqsave(&clk_lock, flags); rate = clk->get_rate(clk); spin_unlock_irqrestore(&clk_lock, flags); @@ -129,6 +138,9 @@ long clk_round_rate(struct clk *clk, unsigned long rate) { unsigned long flags, actual_rate; + if (!clk) + return 0; + if (!clk->set_rate) return -ENOSYS; @@ -145,6 +157,9 @@ int clk_set_rate(struct clk *clk, unsigned long rate) unsigned long flags; long ret; + if (!clk) + return 0; + if (!clk->set_rate) return -ENOSYS; @@ -161,6 +176,9 @@ int clk_set_parent(struct clk *clk, struct clk *parent) unsigned long flags; int ret; + if (!clk) + return 0; + if (!clk->set_parent) return -ENOSYS; @@ -174,7 +192,7 @@ EXPORT_SYMBOL(clk_set_parent); struct clk *clk_get_parent(struct clk *clk) { - return clk->parent; + return !clk ? NULL : clk->parent; } EXPORT_SYMBOL(clk_get_parent); diff --git a/arch/avr32/mach-at32ap/extint.c b/arch/avr32/mach-at32ap/extint.c index cfb298d66305..2d48b6a46166 100644 --- a/arch/avr32/mach-at32ap/extint.c +++ b/arch/avr32/mach-at32ap/extint.c @@ -231,8 +231,7 @@ static int __init eic_probe(struct platform_device *pdev) irq_set_chip_data(eic->first_irq + i, eic); } - irq_set_chained_handler(int_irq, demux_eic_irq); - irq_set_handler_data(int_irq, eic); + irq_set_chained_handler_and_data(int_irq, demux_eic_irq, eic); if (pdev->id == 0) { nmi_eic = eic; diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c index d223a8b57c1e..c03533937a9f 100644 --- a/arch/avr32/mm/fault.c +++ b/arch/avr32/mm/fault.c @@ -14,11 +14,11 @@ #include <linux/pagemap.h> #include <linux/kdebug.h> #include <linux/kprobes.h> +#include <linux/uaccess.h> #include <asm/mmu_context.h> #include <asm/sysreg.h> #include <asm/tlb.h> -#include <asm/uaccess.h> #ifdef CONFIG_KPROBES static inline int notify_page_fault(struct pt_regs *regs, int trap) @@ -81,7 +81,7 @@ asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs) * If we're in an interrupt or have no user context, we must * not take the fault... */ - if (in_atomic() || !mm || regs->sr & SYSREG_BIT(GM)) + if (faulthandler_disabled() || !mm || regs->sr & SYSREG_BIT(GM)) goto no_context; local_irq_enable(); |