mirror of https://gitee.com/openkylin/linux.git
0c28130b5c
In include/asm-x86_64/string.h there are such comments: /* Use C out of line version for memcmp */ #define memcmp __builtin_memcmp int memcmp(const void * cs,const void * ct,size_t count); This would mean that if the compiler does not decide to use __builtin_memcmp, it emits a call to memcmp to be satisfied by the C out-of-line version in lib/string.c. What happens is that after preprocessing, in lib/string.i you may find the definition of "__builtin_strcmp". Actually, by accident, in the object you will find the definition of strcmp and such (maybe a trick intended to redirect calls to __builtin_memcmp to the default memcmp when the definition is not expanded); however, this particular case is not a documented feature as far as I can see. Also, the EXPORT_SYMBOL does not work, so it's duplicated in the arch. I simply added some #undef to lib/string.c and removed the (now duplicated) exports in x86-64 and UML/x86_64 subarchs (the second ones are introduced by another patch I just posted for -mm). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> CC: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
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| .. | ||
| reed_solomon | ||
| zlib_deflate | ||
| zlib_inflate | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| bitmap.c | ||
| bust_spinlocks.c | ||
| cmdline.c | ||
| crc-ccitt.c | ||
| crc32.c | ||
| crc32defs.h | ||
| ctype.c | ||
| dec_and_lock.c | ||
| div64.c | ||
| dump_stack.c | ||
| errno.c | ||
| extable.c | ||
| find_next_bit.c | ||
| gen_crc32table.c | ||
| halfmd4.c | ||
| idr.c | ||
| inflate.c | ||
| int_sqrt.c | ||
| iomap.c | ||
| kernel_lock.c | ||
| kobject.c | ||
| kobject_uevent.c | ||
| kref.c | ||
| libcrc32c.c | ||
| parser.c | ||
| prio_tree.c | ||
| radix-tree.c | ||
| rbtree.c | ||
| rwsem-spinlock.c | ||
| rwsem.c | ||
| sha1.c | ||
| sort.c | ||
| string.c | ||
| vsprintf.c | ||