Commit 52393ccc authored by Steven Rostedt's avatar Steven Rostedt Committed by Linus Torvalds
Browse files

[PATCH] remove set_wmb - arch removal 



set_wmb should not be used in the kernel because it just confuses the
code more and has no benefit.  Since it is not currently used in the
kernel this patch removes it so that new code does not include it.

All archs define set_wmb(var, value) to do { var = value; wmb(); }
while(0) except ia64 and sparc which use a mb() instead.  But this is
still moot since it is not used anyway.

Hasn't been tested on any archs but x86 and x86_64 (and only compiled
tested)

Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent f92213ba

include/asm-alpha/barrier.h

+0 −3
Original line number Diff line number Diff line
@@ -30,7 +30,4 @@ __asm__ __volatile__("mb": : :"memory") 
#define set_mb(var, value) \

do { var = value; mb(); } while (0)



#define set_wmb(var, value) \

do { var = value; wmb(); } while (0)



#endif		/* __BARRIER_H */

include/asm-arm/system.h

+0 −1
Original line number Diff line number Diff line
@@ -176,7 +176,6 @@ extern unsigned int user_debug; 
#define wmb() mb()

#define read_barrier_depends() do { } while(0)

#define set_mb(var, value)  do { var = value; mb(); } while (0)

#define set_wmb(var, value) do { var = value; wmb(); } while (0)

#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");



/*

include/asm-arm26/system.h

+0 −1
Original line number Diff line number Diff line
@@ -90,7 +90,6 @@ extern unsigned int user_debug; 


#define read_barrier_depends() do { } while(0)

#define set_mb(var, value)  do { var = value; mb(); } while (0)

#define set_wmb(var, value) do { var = value; wmb(); } while (0)



/*

 * We assume knowledge of how

include/asm-cris/system.h

+0 −1
Original line number Diff line number Diff line
@@ -17,7 +17,6 @@ extern struct task_struct *resume(struct task_struct *prev, struct task_struct * 
#define wmb() mb()

#define read_barrier_depends() do { } while(0)

#define set_mb(var, value)  do { var = value; mb(); } while (0)

#define set_wmb(var, value) do { var = value; wmb(); } while (0)



#ifdef CONFIG_SMP

#define smp_mb()        mb()

include/asm-frv/system.h

+0 −1
Original line number Diff line number Diff line
@@ -179,7 +179,6 @@ do { \ 
#define rmb()			asm volatile ("membar" : : :"memory")

#define wmb()			asm volatile ("membar" : : :"memory")

#define set_mb(var, value)	do { var = value; mb(); } while (0)

#define set_wmb(var, value)	do { var = value; wmb(); } while (0)



#define smp_mb()		mb()

#define smp_rmb()		rmb()

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