diff options
Diffstat (limited to 'lib/string.c')
| -rw-r--r-- | lib/string.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/string.c b/lib/string.c index cdd97f431ae2..ce81aaec3839 100644 --- a/lib/string.c +++ b/lib/string.c @@ -596,6 +596,11 @@ EXPORT_SYMBOL(memset); * @s: Pointer to the start of the area. * @count: The size of the area. * + * Note: usually using memset() is just fine (!), but in cases + * where clearing out _local_ data at the end of a scope is + * necessary, memzero_explicit() should be used instead in + * order to prevent the compiler from optimising away zeroing. + * * memzero_explicit() doesn't need an arch-specific version as * it just invokes the one of memset() implicitly. */ |