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sched: Extract the basic add/sub preempt_count modifiers

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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>
This commit is contained in:
Peter Zijlstra
2013-09-10 12:15:23 +02:00
committed by Ingo Molnar
parent 0102874755
commit bdb4380658
10 changed files with 113 additions and 103 deletions
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5
arch/mips/mm/init.c
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@@ -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,