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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 11:34:40 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:15:49 +0200
commitc7248321a3d42ffba78db0dde88d1c49ca1c045f (patch)
treeecd2b86a077f764e200b3c214cd1f851d4e3c6e0 /init/do_mounts_initrd.c
parent3a18ef5c1b3935cb05888fc37964321f7bd6231d (diff)
downloadlinux-c7248321a3d42ffba78db0dde88d1c49ca1c045f.tar.bz2
fs: add ksys_dup{,3}() helper; remove in-kernel calls to sys_dup{,3}()
Using ksys_dup() and ksys_dup3() as helper functions allows us to avoid the in-kernel calls to the sys_dup() and sys_dup3() syscalls. The ksys_ prefix denotes that these functions are meant as a drop-in replacement for the syscalls. In particular, they use the same calling convention as sys_dup{,3}(). In the near future, the fs-external callers of ksys_dup{,3}() should be converted to call do_dup2() directly. Then, ksys_dup{,3}() can be moved within sys_dup{,3}() 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 'init/do_mounts_initrd.c')
-rw-r--r--init/do_mounts_initrd.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 1c4da8353332..e8573e1776f6 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -39,8 +39,8 @@ static int init_linuxrc(struct subprocess_info *info, struct cred *new)
sys_unshare(CLONE_FS | CLONE_FILES);
/* stdin/stdout/stderr for /linuxrc */
sys_open("/dev/console", O_RDWR, 0);
- sys_dup(0);
- sys_dup(0);
+ ksys_dup(0);
+ ksys_dup(0);
/* move initrd over / and chdir/chroot in initrd root */
sys_chdir("/root");
ksys_mount(".", "/", NULL, MS_MOVE, NULL);