init: add an init_umount helper

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.

Christoph Hellwig committed 6 years ago

Commit 09267de1 parent c60166f6 files · +19 −4Browse files

Showing the changes to include/linux (2 of 6 files). Show all

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2 files

include/linux/init_syscalls.h +1 −0
include/linux/syscalls.h +0 −1

include/linux/init_syscalls.h+1−0

@@ -2,3 +2,4 @@ · 1 unmodified line
2		2
3	int __init init_mount(const char dev_name, const char dir_name,	3	int __init init_mount(const char dev_name, const char dir_name,
4	const char type_page, unsigned long flags, void data_page);	4	const char type_page, unsigned long flags, void data_page);
		5	int __init init_umount(const char *name, int flags);

include/linux/syscalls.h+0−1

@@ -1236,7 +1236,6 @@ asmlinkage long sys_ni_syscall(void); · 1235 unmodified lines
1236	* the ksys_xyzyyz() functions prototyped below.	1236	* the ksys_xyzyyz() functions prototyped below.
1237	*/	1237	*/
1238		1238
1239	int ksys_umount(char __user *name, int flags);
1240	int ksys_chroot(const char __user *filename);	1239	int ksys_chroot(const char __user *filename);
1241	ssize_t ksys_write(unsigned int fd, const char __user *buf, size_t count);	1240	ssize_t ksys_write(unsigned int fd, const char __user *buf, size_t count);
1242	int ksys_chdir(const char __user *filename);	1241	int ksys_chdir(const char __user *filename);

@@ -2,3 +2,4 @@ · 1 unmodified line
2		2
3	int __init init_mount(const char dev_name, const char dir_name,	3	int __init init_mount(const char dev_name, const char dir_name,
4	const char type_page, unsigned long flags, void data_page);	4	const char type_page, unsigned long flags, void data_page);
		5	int __init init_umount(const char *name, int flags);