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authorEric Dumazet <dada1@cosmosbay.com>2008-05-14 16:05:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-14 19:11:14 -0700
commit44c81433e8b05dbc85985d939046f10f95901184 (patch)
tree861801baf94a47c38f449f99aea6b5a0395f2f10 /include/linux/percpu.h
parentfd8a4221ad76df700ff34875c9fbc42302aa4ba3 (diff)
per_cpu: fix DEFINE_PER_CPU_SHARED_ALIGNED for modules
Current module loader lookups ".data.percpu" ELF section to perform per_cpu relocation. But DEFINE_PER_CPU_SHARED_ALIGNED() uses another section (".data.percpu.shared_aligned"), currently only handled in vmlinux.lds, not by module loader. To correct this problem, instead of adding logic into module loader, or using at build time a module.lds file for all arches to group ".data.percpu.shared_aligned" into ".data.percpu", just use ".data.percpu" for modules. Alignment requirements are correctly handled by ld and module loader. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/percpu.h')
-rw-r--r--include/linux/percpu.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index d746a2abb32..4cdd393e71e 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -13,8 +13,14 @@
__attribute__((__section__(".data.percpu"))) \
PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
+#ifdef MODULE
+#define SHARED_ALIGNED_SECTION ".data.percpu"
+#else
+#define SHARED_ALIGNED_SECTION ".data.percpu.shared_aligned"
+#endif
+
#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
- __attribute__((__section__(".data.percpu.shared_aligned"))) \
+ __attribute__((__section__(SHARED_ALIGNED_SECTION))) \
PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name \
____cacheline_aligned_in_smp
#else