linux/init/do_mounts.h
Arnd Bergmann 046aa1265f initramfs: use vfs_stat/lstat directly
sys_newlstat is a system call implementation that is meant for user
space, and that copies kernel-internal data structure to the user
format, which is not needed for in-kernel users.

Further, as we rearrange the system call implementation so we can extend
it with 64-bit time_t, the prototype for sys_newlstat changes.

This changes the initramfs code to use vfs_lstat directly, to get it out
of the way of the time_t changes, and make it slightly more efficient in
the process.  Along the same lines we also replace sys_stat and
sys_stat64 with vfs_stat.

Link: http://lkml.kernel.org/r/20170314214932.4052842-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-05-08 17:15:12 -07:00

63 lines
1.1 KiB
C

#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/syscalls.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/mount.h>
#include <linux/major.h>
#include <linux/root_dev.h>
void change_floppy(char *fmt, ...);
void mount_block_root(char *name, int flags);
void mount_root(void);
extern int root_mountflags;
static inline int create_dev(char *name, dev_t dev)
{
sys_unlink(name);
return sys_mknod(name, S_IFBLK|0600, new_encode_dev(dev));
}
static inline u32 bstat(char *name)
{
struct kstat stat;
if (vfs_stat(name, &stat) != 0)
return 0;
if (!S_ISBLK(stat.mode))
return 0;
return stat.rdev;
}
#ifdef CONFIG_BLK_DEV_RAM
int __init rd_load_disk(int n);
int __init rd_load_image(char *from);
#else
static inline int rd_load_disk(int n) { return 0; }
static inline int rd_load_image(char *from) { return 0; }
#endif
#ifdef CONFIG_BLK_DEV_INITRD
bool __init initrd_load(void);
#else
static inline bool initrd_load(void) { return false; }
#endif
#ifdef CONFIG_BLK_DEV_MD
void md_run_setup(void);
#else
static inline void md_run_setup(void) {}
#endif