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authorPeter Zijlstra <peterz@infradead.org>2013-09-10 12:15:23 +0200
committerIngo Molnar <mingo@kernel.org>2013-09-25 14:07:54 +0200
commitbdb43806589096ac4272fe1307e789846ac08d7c (patch)
treec854e7e508193766d5cbdd82e8709cfab5ea3be5 /arch
parent01028747559ac6c6f642a7bbd2875cc4f66b2feb (diff)
sched: Extract the basic add/sub preempt_count modifiers
Rewrite the preempt_count macros in order to extract the 3 basic preempt_count value modifiers: __preempt_count_add() __preempt_count_sub() and the new: __preempt_count_dec_and_test() And since we're at it anyway, replace the unconventional $op_preempt_count names with the more conventional preempt_count_$op. Since these basic operators are equivalent to the previous _notrace() variants, do away with the _notrace() versions. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-ewbpdbupy9xpsjhg960zwbv8@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/mm/init.c5
-rw-r--r--arch/x86/kernel/traps.c4
2 files changed, 4 insertions, 5 deletions
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index e205ef598e9..12156176c7c 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -124,7 +124,7 @@ void *kmap_coherent(struct page *page, unsigned long addr)
BUG_ON(Page_dcache_dirty(page));
- inc_preempt_count();
+ pagefault_disable();
idx = (addr >> PAGE_SHIFT) & (FIX_N_COLOURS - 1);
#ifdef CONFIG_MIPS_MT_SMTC
idx += FIX_N_COLOURS * smp_processor_id() +
@@ -193,8 +193,7 @@ void kunmap_coherent(void)
write_c0_entryhi(old_ctx);
EXIT_CRITICAL(flags);
#endif
- dec_preempt_count();
- preempt_check_resched();
+ pagefault_enable();
}
void copy_user_highpage(struct page *to, struct page *from,
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 8c8093b146c..729aa779ff7 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -88,7 +88,7 @@ static inline void conditional_sti(struct pt_regs *regs)
static inline void preempt_conditional_sti(struct pt_regs *regs)
{
- inc_preempt_count();
+ preempt_count_inc();
if (regs->flags & X86_EFLAGS_IF)
local_irq_enable();
}
@@ -103,7 +103,7 @@ static inline void preempt_conditional_cli(struct pt_regs *regs)
{
if (regs->flags & X86_EFLAGS_IF)
local_irq_disable();
- dec_preempt_count();
+ preempt_count_dec();
}
static int __kprobes