From 3a18ef5c1b3935cb05888fc37964321f7bd6231d Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Sun, 11 Mar 2018 11:34:40 +0100 Subject: fs: add ksys_umount() helper; remove in-kernel call to sys_umount() Using this helper allows us to avoid the in-kernel call to the sys_umount() 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 ksys_umount(). In the near future, the only fs-external caller of ksys_umount() should be converted to call do_umount() directly. Then, ksys_umount() can be moved within sys_umount() 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 Signed-off-by: Dominik Brodowski --- init/do_mounts_initrd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'init/do_mounts_initrd.c') diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c index 7868a6039fb4..1c4da8353332 100644 --- a/init/do_mounts_initrd.c +++ b/init/do_mounts_initrd.c @@ -105,7 +105,7 @@ static void __init handle_initrd(void) else printk("failed\n"); printk(KERN_NOTICE "Unmounting old root\n"); - sys_umount("/old", MNT_DETACH); + ksys_umount("/old", MNT_DETACH); printk(KERN_NOTICE "Trying to free ramdisk memory ... "); if (fd < 0) { error = fd; -- cgit v1.2.3