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init: add an init_umount helper

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Like ksys_umount, but takes a kernel pointer for the destination path.
Switch over the umount in the init code, which just happen to work due to
the implicit set_fs(KERNEL_DS) during early init right now.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
2020-07-23 08:23:08 +02:00
parent c60166f042
commit 09267defa3
6 changed files with 19 additions and 4 deletions
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4
fs/namespace.c
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@@ -1706,7 +1706,7 @@ static inline bool may_mandlock(void)
}
#endif
static int path_umount(struct path *path, int flags)
int path_umount(struct path *path, int flags)
{
struct mount *mnt;
int retval;
@@ -1736,7 +1736,7 @@ dput_and_out:
return retval;
}
int ksys_umount(char __user *name, int flags)
static int ksys_umount(char __user *name, int flags)
{
int lookup_flags = LOOKUP_MOUNTPOINT;
struct path path;