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| author |   Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-20 19:29:53 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:42 +0200 |
| commit | e02af2ff654806c5dc93412fffd77d67d1125ccc (patch) | |
| tree | 43f31b20bcc22e244c0c4243d7d5e3c4701a1a74 /fs/fcntl.c | |
| parent | fs: add kern_select() helper; remove in-kernel call to sys_select() (diff) | |
| download | wireguard-linux-e02af2ff654806c5dc93412fffd77d67d1125ccc.tar.xz wireguard-linux-e02af2ff654806c5dc93412fffd77d67d1125ccc.zip | |
fs: add do_compat_fcntl64() helper; remove in-kernel call to compat syscall
Using the fs-internal do_compat_fcntl64() helper allows us to get rid of
the fs-internal call to the compat_sys_fcntl64() syscall.
This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'fs/fcntl.c')
| -rw-r--r-- | fs/fcntl.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c index 1e97f1fda90c..d737ff082472 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -607,8 +607,8 @@ static int fixup_compat_flock(struct flock *flock) return 0; } -COMPAT_SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd, - compat_ulong_t, arg) +static long do_compat_fcntl64(unsigned int fd, unsigned int cmd, + compat_ulong_t arg) { struct fd f = fdget_raw(fd); struct flock flock; @@ -672,6 +672,12 @@ out_put: return err; } +COMPAT_SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd, + compat_ulong_t, arg) +{ + return do_compat_fcntl64(fd, cmd, arg); +} + COMPAT_SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd, compat_ulong_t, arg) { @@ -684,7 +690,7 @@ COMPAT_SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd, case F_OFD_SETLKW: return -EINVAL; } - return compat_sys_fcntl64(fd, cmd, arg); + return do_compat_fcntl64(fd, cmd, arg); } #endif |