ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 12:43:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

sched: Introduce preempt_count accessor functions

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

3
lib/smp_processor_id.c
View File

@@ -9,10 +9,9 @@
notrace unsigned int debug_smp_processor_id(void)
{
unsigned long preempt_count = preempt_count();
int this_cpu = raw_smp_processor_id();
if (likely(preempt_count))
if (likely(preempt_count()))
goto out;
if (irqs_disabled())