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authorAlexander Duyck <alexander.h.duyck@redhat.com>2014-12-12 02:01:55 +0300
committerDavid S. Miller <davem@davemloft.net>2014-12-12 05:15:05 +0300
commit8a449718414ff10b9d5559ed3e8e09c7178774f2 (patch)
tree81097c0d6949fb90e40176ddff1f4be30467b576 /arch/sparc
parentc11a9009ae6a8c42a8cd69d885601e1aa6fbea04 (diff)
downloadlinux-8a449718414ff10b9d5559ed3e8e09c7178774f2.tar.xz
arch: Cleanup read_barrier_depends() and comments
This patch is meant to cleanup the handling of read_barrier_depends and smp_read_barrier_depends. In multiple spots in the kernel headers read_barrier_depends is defined as "do {} while (0)", however we then go into the SMP vs non-SMP sections and have the SMP version reference read_barrier_depends, and the non-SMP define it as yet another empty do/while. With this commit I went through and cleaned out the duplicate definitions and reduced the number of definitions down to 2 per header. In addition I moved the 50 line comments for the macro from the x86 and mips headers that defined it as an empty do/while to those that were actually defining the macro, alpha and blackfin. Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/include/asm/barrier_64.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sparc/include/asm/barrier_64.h b/arch/sparc/include/asm/barrier_64.h
index 305dcc3dc721..6c974c0977ad 100644
--- a/arch/sparc/include/asm/barrier_64.h
+++ b/arch/sparc/include/asm/barrier_64.h
@@ -37,7 +37,6 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
#define rmb() __asm__ __volatile__("":::"memory")
#define wmb() __asm__ __volatile__("":::"memory")
-#define read_barrier_depends() do { } while(0)
#define set_mb(__var, __value) \
do { __var = __value; membar_safe("#StoreLoad"); } while(0)
@@ -51,7 +50,8 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
#define smp_wmb() __asm__ __volatile__("":::"memory")
#endif
-#define smp_read_barrier_depends() do { } while(0)
+#define read_barrier_depends() do { } while (0)
+#define smp_read_barrier_depends() do { } while (0)
#define smp_store_release(p, v) \
do { \