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sched: Introduce preempt_count accessor functions

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Replace the single preempt_count() 'function' that's an lvalue with
two proper functions:

 preempt_count() - returns the preempt_count value as rvalue
 preempt_count_set() - Allows setting the preempt-count value

Also provide preempt_count_ptr() as a convenience wrapper to implement
all modifying operations.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-orxrbycjozopqfhb4dxdkdvb@git.kernel.org
[ Fixed build failure. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2013-08-14 14:55:24 +02:00 • committed by Ingo Molnar
parent ea81174789
commit 4a2b4b2227
7 changed files with 30 additions and 18 deletions
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2
init/main.c
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@ -692,7 +692,7 @@ int __init_or_module do_one_initcall(initcall_t fn)
if (preempt_count() != count) {
sprintf(msgbuf, "preemption imbalance ");
preempt_count() = count;
preempt_count_set(count);
}
if (irqs_disabled()) {
strlcat(msgbuf, "disabled interrupts ", sizeof(msgbuf));