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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:46 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:51 +0200 |
| commit | 447016e9681965fda8dcd9e4fd3c55308a6fd166 (patch) | |
| tree | 02db8c01fa405f0f16ba09bbee415cdf15e30b14 /init | |
| parent | e7a3e8b2edf544ec28f689385c3adc2903f46ec0 (diff) | |
| download | linux-rpi3-447016e9681965fda8dcd9e4fd3c55308a6fd166.tar.gz linux-rpi3-447016e9681965fda8dcd9e4fd3c55308a6fd166.tar.bz2 linux-rpi3-447016e9681965fda8dcd9e4fd3c55308a6fd166.zip | |
fs: add ksys_chdir() helper; remove in-kernel calls to sys_chdir()
Using this helper allows us to avoid the in-kernel calls to the sys_chdir()
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_chdir().
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 'init')
| -rw-r--r-- | init/do_mounts.c | 2 | ||||
| -rw-r--r-- | init/do_mounts_initrd.c | 8 |
2 files changed, 5 insertions, 5 deletions
diff --git a/init/do_mounts.c b/init/do_mounts.c index 2f06f7827b0c..89f18985fa90 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -367,7 +367,7 @@ static int __init do_mount_root(char *name, char *fs, int flags, void *data) if (err) return err; - sys_chdir("/root"); + ksys_chdir("/root"); s = current->fs->pwd.dentry->d_sb; ROOT_DEV = s->s_dev; printk(KERN_INFO diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c index 71293265ac4b..83f396d30b9a 100644 --- a/init/do_mounts_initrd.c +++ b/init/do_mounts_initrd.c @@ -42,7 +42,7 @@ static int init_linuxrc(struct subprocess_info *info, struct cred *new) ksys_dup(0); ksys_dup(0); /* move initrd over / and chdir/chroot in initrd root */ - sys_chdir("/root"); + ksys_chdir("/root"); ksys_mount(".", "/", NULL, MS_MOVE, NULL); ksys_chroot("."); sys_setsid(); @@ -61,7 +61,7 @@ static void __init handle_initrd(void) /* mount initrd on rootfs' /root */ mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY); sys_mkdir("/old", 0700); - sys_chdir("/old"); + ksys_chdir("/old"); /* try loading default modules from initrd */ load_default_modules(); @@ -86,11 +86,11 @@ static void __init handle_initrd(void) ksys_chroot(".."); if (new_decode_dev(real_root_dev) == Root_RAM0) { - sys_chdir("/old"); + ksys_chdir("/old"); return; } - sys_chdir("/"); + ksys_chdir("/"); ROOT_DEV = new_decode_dev(real_root_dev); mount_root(); |