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locking/core: Provide common cpu_relax_yield() definition

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No need to duplicate the same define everywhere. Since
the only user is stop-machine and the only provider is
s390, we can use a default implementation of cpu_relax_yield()
in sched.h.

Suggested-by: Russell King <[email protected]>
Signed-off-by: Christian Borntraeger <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Acked-by: Russell King <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Noam Camus <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: linux-s390 <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Christian Borntraeger 2016-11-16 13:23:05 +01:00 • committed by Ingo Molnar
commit 6d0d287891
33 changed files with 5 additions and 38 deletions
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1
arch/sparc/include/asm/processor_32.h
View file

@ -119,7 +119,6 @@ extern struct task_struct *last_task_used_math;
int do_mathemu(struct pt_regs *regs, struct task_struct *fpt);
#define cpu_relax() barrier()
#define cpu_relax_yield() cpu_relax()
extern void (*sparc_idle)(void);

1
arch/sparc/include/asm/processor_64.h
View file

@ -216,7 +216,6 @@ unsigned long get_wchan(struct task_struct *task);
"nop\n\t" \
".previous" \
::: "memory")
#define cpu_relax_yield() cpu_relax()
/* Prefetch support. This is tuned for UltraSPARC-III and later.
* UltraSPARC-I will treat these as nops, and UltraSPARC-II has