On Thu, Apr 30, 2020 at 08:07:33PM -0500, Josh Poimboeuf wrote:
> On Thu, Apr 30, 2020 at 04:05:07PM +0200, Arnd Bergmann wrote:
> > lib/strncpy_from_user.o: warning: objtool: strncpy_from_user()+0x133: call
> > to do_strncpy_from_user() with UACCESS enabled
> > lib/strnlen_user.o: warning: objtool: strnlen_user()+0x122: call to
> > do_strnlen_user() with UACCESS enabled
>
> Does this fix it?
>
GCC is a moron, a static function with inline and a single callsite,
let's out-of-line it, shees!, try this instead:
diff --git a/lib/strncpy_from_user.c b/lib/strncpy_from_user.c
index 706020b06617..be420c8c0fdd 100644
--- a/lib/strncpy_from_user.c
+++ b/lib/strncpy_from_user.c
@@ -24,7 +24,7 @@
* hit it), 'max' is the address space maximum (and we return
* -EFAULT if we hit it).
*/
-static inline long do_strncpy_from_user(char *dst, const char __user *src,
+static __always_inline long do_strncpy_from_user(char *dst, const char __user
*src,
unsigned long count, unsigned long max)
{
const struct word_at_a_time constants = WORD_AT_A_TIME_CONSTANTS;
diff --git a/lib/strnlen_user.c b/lib/strnlen_user.c
index 41670d4a5816..c996b745733e 100644
--- a/lib/strnlen_user.c
+++ b/lib/strnlen_user.c
@@ -20,7 +20,7 @@
* if it fits in a aligned 'long'. The caller needs to check
* the return value against "> max".
*/
-static inline long do_strnlen_user(const char __user *src, unsigned long
count, unsigned long max)
+static __always_inline long do_strnlen_user(const char __user *src, unsigned
long count, unsigned long max)
{
const struct word_at_a_time constants = WORD_AT_A_TIME_CONSTANTS;
unsigned long align, res = 0;
