On Mon, 2018-01-08 at 20:17 +0800, Xiongfeng Wang wrote: > From: Xiongfeng Wang <[email protected]> > > gcc-8 reports > > inlined from 'copy_name' at fs/hfsplus/xattr.c:416:3: > ./include/linux/string.h:245:9: warning: '__builtin_strncpy' output > truncated before terminating nul copying 4 bytes from a string of the > same length [-Wstringop-truncation] > > Since we don't need to copy '\0', we can just use memcpy() to avoid > this > warning. >
If the gcc-8 emits the warning then the suggested change makes sense. Looks good. Reviewed-by: Vyacheslav Dubeyko <[email protected]> Thanks, Vyacheslav Dubeyko. > Signed-off-by: Xiongfeng Wang <[email protected]> > --- > fs/hfsplus/xattr.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c > index e538b75..0dc8a65 100644 > --- a/fs/hfsplus/xattr.c > +++ b/fs/hfsplus/xattr.c > @@ -413,7 +413,7 @@ static int copy_name(char *buffer, const char > *xattr_name, int name_len) > int offset = 0; > > if (!is_known_namespace(xattr_name)) { > - strncpy(buffer, XATTR_MAC_OSX_PREFIX, > XATTR_MAC_OSX_PREFIX_LEN); > + memcpy(buffer, XATTR_MAC_OSX_PREFIX, > XATTR_MAC_OSX_PREFIX_LEN); > offset += XATTR_MAC_OSX_PREFIX_LEN; > len += XATTR_MAC_OSX_PREFIX_LEN; > }
