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authorDominik Brodowski <linux@dominikbrodowski.net>2019-11-27 20:24:14 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2019-12-12 14:50:03 +0100
commitd4440aac83d12f87df9bcc51e992b9c28c7f4fa5 (patch)
tree0069801b93c9061d8b1ecc1a271c5c4168deab8e /init
parent5e787dbf659fe77d56215be74044f85e01b3920f (diff)
downloadblackbird-op-linux-d4440aac83d12f87df9bcc51e992b9c28c7f4fa5.tar.gz
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initrd: use do_mount() instead of ksys_mount()
All three calls to ksys_mount() in initrd-related kernel code can be switched over to do_mount(): - the first and third arguments are const strings in the kernel, and do not need to be copied over from userspace; - the fifth argument is NULL, and therefore no page needs to be, copied over from userspace; - the second and fourth argument are passed through anyway. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'init')
-rw-r--r--init/do_mounts_initrd.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index a9c6cc56f505..3bf7b74153ab 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -54,7 +54,7 @@ static int init_linuxrc(struct subprocess_info *info, struct cred *new)
ksys_dup(0);
/* move initrd over / and chdir/chroot in initrd root */
ksys_chdir("/root");
- ksys_mount(".", "/", NULL, MS_MOVE, NULL);
+ do_mount(".", "/", NULL, MS_MOVE, NULL);
ksys_chroot(".");
ksys_setsid();
return 0;
@@ -89,7 +89,7 @@ static void __init handle_initrd(void)
current->flags &= ~PF_FREEZER_SKIP;
/* move initrd to rootfs' /old */
- ksys_mount("..", ".", NULL, MS_MOVE, NULL);
+ do_mount("..", ".", NULL, MS_MOVE, NULL);
/* switch root and cwd back to / of rootfs */
ksys_chroot("..");
@@ -103,7 +103,7 @@ static void __init handle_initrd(void)
mount_root();
printk(KERN_NOTICE "Trying to move old root to /initrd ... ");
- error = ksys_mount("/old", "/root/initrd", NULL, MS_MOVE, NULL);
+ error = do_mount("/old", "/root/initrd", NULL, MS_MOVE, NULL);
if (!error)
printk("okay\n");
else {
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