diff options
| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:54 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:16:00 +0200 |
| commit | 411d9475cf901b5a6d2996b46cb5726184a4fa50 (patch) | |
| tree | 9edd781b00784cd4f178e44d684c5ab4092cd551 /fs | |
| parent | 55731b3cda3a85ee888dac3bf1f36489f275c187 (diff) | |
fs: add ksys_ftruncate() wrapper; remove in-kernel calls to sys_ftruncate()
Using the ksys_ftruncate() wrapper allows us to get rid of in-kernel
calls to the sys_ftruncate() 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_ftruncate().
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/internal.h | 1 | ||||
| -rw-r--r-- | fs/open.c | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/fs/internal.h b/fs/internal.h index c797480cbd6f..980d005b21b4 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -119,6 +119,7 @@ extern struct file *do_filp_open(int dfd, struct filename *pathname, extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, const char *, const struct open_flags *); +long do_sys_ftruncate(unsigned int fd, loff_t length, int small); long do_faccessat(int dfd, const char __user *filename, int mode); int do_fchmodat(int dfd, const char __user *filename, umode_t mode); int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, diff --git a/fs/open.c b/fs/open.c index 7b2eccb541f2..b3f3b2cd9f19 100644 --- a/fs/open.c +++ b/fs/open.c @@ -162,7 +162,7 @@ COMPAT_SYSCALL_DEFINE2(truncate, const char __user *, path, compat_off_t, length } #endif -static long do_sys_ftruncate(unsigned int fd, loff_t length, int small) +long do_sys_ftruncate(unsigned int fd, loff_t length, int small) { struct inode *inode; struct dentry *dentry; |