From ea02e3dde3509ffa7fda7f8de9c8a366e03f7bbd Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Thu, 19 Jul 2007 01:49:09 -0700
Subject: [PATCH] FRV: work around a possible compiler bug
Work around a possible bug in the FRV compiler.
What appears to be happening is that gcc resolves the
__builtin_constant_p() in kmalloc() to true, but then fails to reduce the
therefore constant conditions in the if-statements it guards to constant
results.
When compiling with -O2 or -Os, one single spurious error crops up in
cpuup_callback() in mm/slab.c. This can be avoided by making the memsize
variable const.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
arch/frv/Makefile | 2 +-
mm/slab.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/frv/Makefile b/arch/frv/Makefile
index 038e3a8457e0b..9bf7345c5cc93 100644
--- a/arch/frv/Makefile
+++ b/arch/frv/Makefile
@@ -88,7 +88,7 @@ ASFLAGS += -mno-fdpic
# make sure the .S files get compiled with debug info
# and disable optimisations that are unhelpful whilst debugging
ifdef CONFIG_DEBUG_INFO
-CFLAGS += -O1
+#CFLAGS += -O1
AFLAGS += -Wa,--gdwarf2
ASFLAGS += -Wa,--gdwarf2
endif
diff --git a/mm/slab.c b/mm/slab.c
index 96d30ee256eff..88bc6336ce3d3 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1163,7 +1163,7 @@ static int __cpuinit cpuup_callback(struct notifier_block *nfb,
struct kmem_cache *cachep;
struct kmem_list3 *l3 = NULL;
int node = cpu_to_node(cpu);
- int memsize = sizeof(struct kmem_list3);
+ const int memsize = sizeof(struct kmem_list3);
switch (action) {
case CPU_LOCK_ACQUIRE:
--
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