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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:27 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:34 +0200 |
| commit | 2dae0248061e6a8a2cccfb2ad01a76f674e40d72 (patch) | |
| tree | 4f8185796cf9fc99bc59c6e50a7506e12c62aa0b /fs | |
| parent | af03c4acb728dd9ed850d329a1cff71d52e7f3a8 (diff) | |
| download | linux-rpi-2dae0248061e6a8a2cccfb2ad01a76f674e40d72.tar.gz linux-rpi-2dae0248061e6a8a2cccfb2ad01a76f674e40d72.tar.bz2 linux-rpi-2dae0248061e6a8a2cccfb2ad01a76f674e40d72.zip | |
fs: add do_readlinkat() helper; remove internal call to sys_readlinkat()
Using the do_readlinkat() helper removes an in-kernel call to the
sys_readlinkat() 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: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/stat.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/stat.c b/fs/stat.c index 873785dae022..f8e6fb2c3657 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -379,8 +379,8 @@ SYSCALL_DEFINE2(newfstat, unsigned int, fd, struct stat __user *, statbuf) return error; } -SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname, - char __user *, buf, int, bufsiz) +static int do_readlinkat(int dfd, const char __user *pathname, + char __user *buf, int bufsiz) { struct path path; int error; @@ -415,10 +415,16 @@ retry: return error; } +SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname, + char __user *, buf, int, bufsiz) +{ + return do_readlinkat(dfd, pathname, buf, bufsiz); +} + SYSCALL_DEFINE3(readlink, const char __user *, path, char __user *, buf, int, bufsiz) { - return sys_readlinkat(AT_FDCWD, path, buf, bufsiz); + return do_readlinkat(AT_FDCWD, path, buf, bufsiz); } |