The patch titled
FRV: work around a possible compiler bug
has been added to the -mm tree. Its filename is
frv-work-around-a-possible-compiler-bug.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: FRV: work around a possible compiler bug
From: David Howells <dhowells@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/frv/Makefile | 2 +-
mm/slab.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff -puN arch/frv/Makefile~frv-work-around-a-possible-compiler-bug arch/frv/Makefile
--- a/arch/frv/Makefile~frv-work-around-a-possible-compiler-bug
+++ a/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 -puN mm/slab.c~frv-work-around-a-possible-compiler-bug mm/slab.c
--- a/mm/slab.c~frv-work-around-a-possible-compiler-bug
+++ a/mm/slab.c
@@ -1163,7 +1163,7 @@ static int __cpuinit cpuup_callback(stru
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:
_
Patches currently in -mm which might be from dhowells@xxxxxxxxxx are
origin.patch
document-page_mkwrite-locking.patch
coredump-masking-bound-suid_dumpable-sysctl.patch
coredump-masking-reimplementation-of-dumpable-using-two-flags.patch
coredump-masking-add-an-interface-for-core-dump-filter.patch
coredump-masking-elf-enable-core-dump-filtering.patch
coredump-masking-elf-fdpic-remove-an-unused-argument.patch
coredump-masking-elf-fdpic-enable-core-dump-filtering.patch
coredump-masking-documentation-for-proc-pid-coredump_filter.patch
frv-work-around-a-possible-compiler-bug.patch
nommu-present-backing-device-capabilities-for-mtd.patch
nommu-add-support-for-direct-mapping-through-mtdconcat.patch
afs-fix-file-locking.patch
mutex-subsystem-synchro-test-module.patch
-
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