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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-19 17:32:11 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:16:08 +0200 |
| commit | df260e21e6cd5d2dfc1fe9b6a3bbf747e72b3bed (patch) | |
| tree | 8731b85570ffef662667b01e33769f9d9d2c2baa /include/linux/syscalls.h | |
| parent | 806cbae1228cc1a19b978c4513f6851e9ab7f388 (diff) | |
| download | lwn-df260e21e6cd5d2dfc1fe9b6a3bbf747e72b3bed.tar.gz lwn-df260e21e6cd5d2dfc1fe9b6a3bbf747e72b3bed.zip | |
fs: add ksys_truncate() wrapper; remove in-kernel calls to sys_truncate()
Using the ksys_truncate() wrapper allows us to get rid of in-kernel
calls to the sys_truncate() 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_truncate().
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 'include/linux/syscalls.h')
| -rw-r--r-- | include/linux/syscalls.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 331da76f66e2..78b79e3a1279 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -1078,4 +1078,11 @@ static inline long ksys_open(const char __user *filename, int flags, return do_sys_open(AT_FDCWD, filename, flags, mode); } +extern long do_sys_truncate(const char __user *pathname, loff_t length); + +static inline long ksys_truncate(const char __user *pathname, loff_t length) +{ + return do_sys_truncate(pathname, length); +} + #endif |