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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 13:34:49 +0300
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 21:15:54 +0300
commit0101db7a301981a008296d522d8c1f456b0fe837 (patch)
tree5db6ec4578e8d5f97e9a2e00b3fbbf21e1204fa8 /init
parentf459dffae1c6026928bbe8e972daecb635b7b5e9 (diff)
downloadlinux-0101db7a301981a008296d522d8c1f456b0fe837.tar.xz
fs: add do_mkdirat() helper and ksys_mkdir() wrapper; remove in-kernel calls to syscall
Using the fs-internal do_mkdirat() helper allows us to get rid of fs-internal calls to the sys_mkdirat() syscall. Introducing the ksys_mkdir() wrapper allows us to avoid the in-kernel calls to the sys_mkdir() 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 sys_mkdir(). 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: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'init')
-rw-r--r--init/do_mounts_initrd.c2
-rw-r--r--init/initramfs.c2
-rw-r--r--init/noinitramfs.c4
3 files changed, 4 insertions, 4 deletions
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index e9e9e1c67d31..99922d1ebfe6 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -60,7 +60,7 @@ static void __init handle_initrd(void)
create_dev("/dev/root.old", Root_RAM0);
/* mount initrd on rootfs' /root */
mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY);
- sys_mkdir("/old", 0700);
+ ksys_mkdir("/old", 0700);
ksys_chdir("/old");
/* try loading default modules from initrd */
diff --git a/init/initramfs.c b/init/initramfs.c
index 73bbb227f868..ca538a5f9fa9 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -352,7 +352,7 @@ static int __init do_name(void)
}
}
} else if (S_ISDIR(mode)) {
- sys_mkdir(collected, mode);
+ ksys_mkdir(collected, mode);
sys_chown(collected, uid, gid);
sys_chmod(collected, mode);
dir_add(collected, mtime);
diff --git a/init/noinitramfs.c b/init/noinitramfs.c
index 267739d85179..a08a9d937e60 100644
--- a/init/noinitramfs.c
+++ b/init/noinitramfs.c
@@ -29,7 +29,7 @@ static int __init default_rootfs(void)
{
int err;
- err = sys_mkdir((const char __user __force *) "/dev", 0755);
+ err = ksys_mkdir((const char __user __force *) "/dev", 0755);
if (err < 0)
goto out;
@@ -39,7 +39,7 @@ static int __init default_rootfs(void)
if (err < 0)
goto out;
- err = sys_mkdir((const char __user __force *) "/root", 0700);
+ err = ksys_mkdir((const char __user __force *) "/root", 0700);
if (err < 0)
goto out;