[PATCH 5/6] CRIS: use generic cmpxchg.h

Rabin Vincent
2015-02-19T19:31:44Z

CRIS can use asm-generic's cmpxchg.h

Signed-off-by: Rabin Vincent <rabin@rab.in>
---
arch/cris/include/asm/Kbuild | 1 +
arch/cris/include/asm/cmpxchg.h | 51 -----------------------------------------
2 files changed, 1 insertion(+), 51 deletions(-)
delete mode 100644 arch/cris/include/asm/cmpxchg.h

diff --git a/arch/cris/include/asm/Kbuild b/arch/cris/include/asm/Kbuild
index 2f2787e..e189931 100644
--- a/arch/cris/include/asm/Kbuild
+++ b/arch/cris/include/asm/Kbuild
@@ -1,6 +1,7 @@
generic-y += atomic.h
generic-y += barrier.h
generic-y += clkdev.h
+generic-y += cmpxchg.h
generic-y += cputime.h
generic-y += exec.h
generic-y += irq_work.h
diff --git a/arch/cris/include/asm/cmpxchg.h b/arch/cris/include/asm/cmpxchg.h
deleted file mode 100644
index deb9048..0000000
--- a/arch/cris/include/asm/cmpxchg.h
+++ /dev/null
@@ -1,51 +0,0 @@
-#ifndef __ASM_CRIS_CMPXCHG__
-#define __ASM_CRIS_CMPXCHG__
-
-#include <linux/irqflags.h>
-
-static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
-{
- /* since Etrax doesn't have any atomic xchg instructions, we need to disable
- irq's (if enabled) and do it with move.d's */
- unsigned long flags,temp;
- local_irq_save(flags); /* save flags, including irq enable bit and shut off irqs */
- switch (size) {
- case 1:
- *((unsigned char *)&temp) = x;
- x = *(unsigned char *)ptr;
- *(unsigned char *)ptr = *((unsigned char *)&temp);
- break;
- case 2:
- *((unsigned short *)&temp) = x;
- x = *(unsigned short *)ptr;
- *(unsigned short *)ptr = *((unsigned short *)&temp);
- break;
- case 4:
- temp = x;
- x = *(unsigned long *)ptr;
- *(unsigned long *)ptr = temp;
- break;
- }
- local_irq_restore(flags); /* restore irq enable bit */
- return x;
-}
-
-#define xchg(ptr,x) \
- ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
-
-#define tas(ptr) (xchg((ptr),1))
-
-#include <asm-generic/cmpxchg-local.h>
-
-/*
- * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
- * them available.
- */
-#define cmpxchg_local(ptr, o, n) \
- ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
- (unsigned long)(n), sizeof(*(ptr))))
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
-
-#include <asm-generic/cmpxchg.h>
-
-#endif /* __ASM_CRIS_CMPXCHG__ */
--
2.1.4