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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:40 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:48 +0200 |
| commit | 3a18ef5c1b3935cb05888fc37964321f7bd6231d (patch) | |
| tree | 2a20ac61be97ab384ecbf94b30a608f4b6c9162c /include/linux/syscalls.h | |
| parent | 312db1aa1dc7bff133d95c92efcc5e42b57cefa6 (diff) | |
| download | lwn-3a18ef5c1b3935cb05888fc37964321f7bd6231d.tar.gz lwn-3a18ef5c1b3935cb05888fc37964321f7bd6231d.zip | |
fs: add ksys_umount() helper; remove in-kernel call to sys_umount()
Using this helper allows us to avoid the in-kernel call to the sys_umount()
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 ksys_umount().
In the near future, the only fs-external caller of ksys_umount() should be
converted to call do_umount() directly. Then, ksys_umount() can be moved
within sys_umount() again.
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 'include/linux/syscalls.h')
| -rw-r--r-- | include/linux/syscalls.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 3a9f9c534624..48964c408c7b 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -948,5 +948,6 @@ asmlinkage long sys_statx(int dfd, const char __user *path, unsigned flags, int ksys_mount(char __user *dev_name, char __user *dir_name, char __user *type, unsigned long flags, void __user *data); +int ksys_umount(char __user *name, int flags); #endif |