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authorJiri Kosina <jkosina@suse.cz>2019-11-29 22:34:28 +0300
committerJiri Kosina <jkosina@suse.cz>2019-11-29 22:34:28 +0300
commitb746a1a2860f4a918f32d10dc569115d282aaf2f (patch)
tree4b30e6ff28e2783c73a1b763e819f5b41414563c /lib/strnlen_user.c
parent8725aa4fa7ded30211ebd28bb1c9bae806eb3841 (diff)
parentb03e5774d51fe003e1020060c403a1d085b128eb (diff)
downloadlinux-b746a1a2860f4a918f32d10dc569115d282aaf2f.tar.xz
Merge branch 'for-5.5/core' into for-linus
- hid_have_special_driver[] cleanup for LED devices (Heiner Kallweit) - HID parser improvements (Blaž Hrastnik, Candle Sun)
Diffstat (limited to 'lib/strnlen_user.c')
-rw-r--r--lib/strnlen_user.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/lib/strnlen_user.c b/lib/strnlen_user.c
index 7f2db3fe311f..6c0005d5dd5c 100644
--- a/lib/strnlen_user.c
+++ b/lib/strnlen_user.c
@@ -2,16 +2,11 @@
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/uaccess.h>
+#include <linux/mm.h>
+#include <linux/bitops.h>
#include <asm/word-at-a-time.h>
-/* Set bits in the first 'n' bytes when loaded from memory */
-#ifdef __LITTLE_ENDIAN
-# define aligned_byte_mask(n) ((1ul << 8*(n))-1)
-#else
-# define aligned_byte_mask(n) (~0xfful << (BITS_PER_LONG - 8 - 8*(n)))
-#endif
-
/*
* Do a strnlen, return length of string *with* final '\0'.
* 'count' is the user-supplied count, while 'max' is the
@@ -109,7 +104,7 @@ long strnlen_user(const char __user *str, long count)
return 0;
max_addr = user_addr_max();
- src_addr = (unsigned long)str;
+ src_addr = (unsigned long)untagged_addr(str);
if (likely(src_addr < max_addr)) {
unsigned long max = max_addr - src_addr;
long retval;