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authorAl Viro <viro@zeniv.linux.org.uk>2017-05-30 07:29:38 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-06-10 06:51:17 +0300
commit1e1fc133483ef3b56c20bf3cd9241146c41042f8 (patch)
tree6f4df10c1fcb97d3cdaf4c006e55dd08f8e3b16f /include/linux/compat.h
parent9a4690379206695b63a175e227877490beb2eeda (diff)
downloadlinux-1e1fc133483ef3b56c20bf3cd9241146c41042f8.tar.xz
compat_{get,put}_bitmap(): use unsafe_{get,put}_user()
unroll the inner loops, while we are at it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/compat.h')
-rw-r--r--include/linux/compat.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 1c5f3152cbb5..94ceb0348a25 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -388,8 +388,7 @@ asmlinkage long compat_sys_wait4(compat_pid_t pid,
#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
-#define BITS_TO_COMPAT_LONGS(bits) \
- (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)
+#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
unsigned long bitmap_size);