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| author | Olof Johansson <olof@lixom.net> | 2016-06-18 22:59:07 -0700 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2016-06-18 22:59:07 -0700 |
| commit | 8fd0976702f05042c776848819e5fd2a835f23c9 (patch) | |
| tree | 8a87b0e33bf39adcc53b3ee4be61155dab86417b /arch/x86/kernel/traps.c | |
| parent | 58935f24a996cb55595c29dd5303bd9b778c8b00 (diff) | |
| parent | 8f50b8e57442d28e41bb736c173d8a2490549a82 (diff) | |
| download | linux-8fd0976702f05042c776848819e5fd2a835f23c9.tar.bz2 | |
Merge tag 'gpmc-omap-fixes-for-v4.7' of https://github.com/rogerq/linux into fixes
OMAP-GPMC: Fixes for for v4.7-rc cycle:
- Fix omap gpmc EXTRADELAY timing. The DT provided timings
were wrongly used causing devices requiring extra delay timing
to fail.
* tag 'gpmc-omap-fixes-for-v4.7' of https://github.com/rogerq/linux:
memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing
+ Linux 4.7-rc3
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/x86/kernel/traps.c')
| -rw-r--r-- | arch/x86/kernel/traps.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index d1590486204a..00f03d82e69a 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -96,6 +96,12 @@ static inline void cond_local_irq_disable(struct pt_regs *regs) local_irq_disable(); } +/* + * In IST context, we explicitly disable preemption. This serves two + * purposes: it makes it much less likely that we would accidentally + * schedule in IST context and it will force a warning if we somehow + * manage to schedule by accident. + */ void ist_enter(struct pt_regs *regs) { if (user_mode(regs)) { @@ -110,13 +116,7 @@ void ist_enter(struct pt_regs *regs) rcu_nmi_enter(); } - /* - * We are atomic because we're on the IST stack; or we're on - * x86_32, in which case we still shouldn't schedule; or we're - * on x86_64 and entered from user mode, in which case we're - * still atomic unless ist_begin_non_atomic is called. - */ - preempt_count_add(HARDIRQ_OFFSET); + preempt_disable(); /* This code is a bit fragile. Test it. */ RCU_LOCKDEP_WARN(!rcu_is_watching(), "ist_enter didn't work"); @@ -124,7 +124,7 @@ void ist_enter(struct pt_regs *regs) void ist_exit(struct pt_regs *regs) { - preempt_count_sub(HARDIRQ_OFFSET); + preempt_enable_no_resched(); if (!user_mode(regs)) rcu_nmi_exit(); @@ -155,7 +155,7 @@ void ist_begin_non_atomic(struct pt_regs *regs) BUG_ON((unsigned long)(current_top_of_stack() - current_stack_pointer()) >= THREAD_SIZE); - preempt_count_sub(HARDIRQ_OFFSET); + preempt_enable_no_resched(); } /** @@ -165,7 +165,7 @@ void ist_begin_non_atomic(struct pt_regs *regs) */ void ist_end_non_atomic(void) { - preempt_count_add(HARDIRQ_OFFSET); + preempt_disable(); } static nokprobe_inline int |