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compat_{get,put}_bitmap(): use unsafe_{get,put}_user()

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unroll the inner loops, while we are at it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-05-30 00:29:38 -04:00
parent 9a46903792
commit 1e1fc13348
2 changed files with 29 additions and 55 deletions
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3
include/linux/compat.h
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@ -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);