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| author | Dominik Brodowski | 2018-03-11 11:34:41 +0100 |
|---|---|---|
| committer | Dominik Brodowski | 2018-04-02 20:15:51 +0200 |
| commit | e7a3e8b2edf544ec28f689385c3adc2903f46ec0 (patch) | |
| tree | f2fa667f8c2a6774aa466ab378a11e4c27cbd066 /include/linux/syscalls.h | |
| parent | fs: add ksys_chroot() helper; remove-in kernel calls to sys_chroot() (diff) | |
| download | kernel-qcow2-linux-e7a3e8b2edf544ec28f689385c3adc2903f46ec0.tar.gz kernel-qcow2-linux-e7a3e8b2edf544ec28f689385c3adc2903f46ec0.tar.xz kernel-qcow2-linux-e7a3e8b2edf544ec28f689385c3adc2903f46ec0.zip | |
fs: add ksys_write() helper; remove in-kernel calls to sys_write()
Using this helper allows us to avoid the in-kernel calls to the sys_write()
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_write().
In the near future, the do_mounts / initramfs callers of ksys_write()
should be converted to use filp_open() and vfs_write() instead.
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>
Cc: linux-s390@vger.kernel.org
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 920a0db1871d..80524faa9664 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -951,5 +951,6 @@ int ksys_mount(char __user *dev_name, char __user *dir_name, char __user *type, int ksys_umount(char __user *name, int flags); int ksys_dup(unsigned int fildes); int ksys_chroot(const char __user *filename); +ssize_t ksys_write(unsigned int fd, const char __user *buf, size_t count); #endif |