Commit 1359798f authored by Martin Wilck's avatar Martin Wilck Committed by Christoph Hellwig

string.h: un-fortify memcpy_and_pad

The way I'd implemented the new helper memcpy_and_pad  with
__FORTIFY_INLINE caused compiler warnings for certain kernel
configurations.

This helper is only used in a single place at this time, and thus
doesn't benefit much from fortification. So simplify the code
by dropping fortification support for now.

Fixes: 01f33c33 "string.h: add memcpy_and_pad()"
Signed-off-by: default avatarMartin Wilck <mwilck@suse.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 044a9df1
...@@ -434,20 +434,9 @@ __FORTIFY_INLINE char *strcpy(char *p, const char *q) ...@@ -434,20 +434,9 @@ __FORTIFY_INLINE char *strcpy(char *p, const char *q)
* @count: The number of bytes to copy * @count: The number of bytes to copy
* @pad: Character to use for padding if space is left in destination. * @pad: Character to use for padding if space is left in destination.
*/ */
__FORTIFY_INLINE void memcpy_and_pad(void *dest, size_t dest_len, static inline void memcpy_and_pad(void *dest, size_t dest_len,
const void *src, size_t count, int pad) const void *src, size_t count, int pad)
{ {
size_t dest_size = __builtin_object_size(dest, 0);
size_t src_size = __builtin_object_size(src, 0);
if (__builtin_constant_p(dest_len) && __builtin_constant_p(count)) {
if (dest_size < dest_len && dest_size < count)
__write_overflow();
else if (src_size < dest_len && src_size < count)
__read_overflow3();
}
if (dest_size < dest_len)
fortify_panic(__func__);
if (dest_len > count) { if (dest_len > count) {
memcpy(dest, src, count); memcpy(dest, src, count);
memset(dest + count, pad, dest_len - count); memset(dest + count, pad, dest_len - count);
......
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