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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 13:34:46 +0300 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 21:15:51 +0300 |
| commit | 447016e9681965fda8dcd9e4fd3c55308a6fd166 (patch) | |
| tree | 02db8c01fa405f0f16ba09bbee415cdf15e30b14 /fs | |
| parent | e7a3e8b2edf544ec28f689385c3adc2903f46ec0 (diff) | |
| download | linux-447016e9681965fda8dcd9e4fd3c55308a6fd166.tar.xz | |
fs: add ksys_chdir() helper; remove in-kernel calls to sys_chdir()
Using this helper allows us to avoid the in-kernel calls to the sys_chdir()
syscall. The ksys_ prefix denotes that this function is meant as a drop-in
replacement for the syscall. In particular, it uses the same calling
convention as sys_chdir().
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')
| -rw-r--r-- | fs/open.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/open.c b/fs/open.c index 7a475e8a2e41..a19b8277c439 100644 --- a/fs/open.c +++ b/fs/open.c @@ -431,7 +431,7 @@ SYSCALL_DEFINE2(access, const char __user *, filename, int, mode) return sys_faccessat(AT_FDCWD, filename, mode); } -SYSCALL_DEFINE1(chdir, const char __user *, filename) +int ksys_chdir(const char __user *filename) { struct path path; int error; @@ -457,6 +457,11 @@ out: return error; } +SYSCALL_DEFINE1(chdir, const char __user *, filename) +{ + return ksys_chdir(filename); +} + SYSCALL_DEFINE1(fchdir, unsigned int, fd) { struct fd f = fdget_raw(fd); |