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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 13:34:39 +0300
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 21:15:48 +0300
commit312db1aa1dc7bff133d95c92efcc5e42b57cefa6 (patch)
treee62c8c554db9e30e7676d847fa75d189231895de /drivers/base/devtmpfs.c
parentab0d1e85bfd0c25260f02cd3708d5abdfb5b5a9c (diff)
downloadlinux-312db1aa1dc7bff133d95c92efcc5e42b57cefa6.tar.xz
fs: add ksys_mount() helper; remove in-kernel calls to sys_mount()
Using this helper allows us to avoid the in-kernel calls to the sys_mount() 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_mount(). In the near future, all callers of ksys_mount() should be converted to call do_mount() directly. 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 <viro@zeniv.linux.org.uk> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'drivers/base/devtmpfs.c')
-rw-r--r--drivers/base/devtmpfs.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 50025d7959cb..4afb04686c8e 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -356,7 +356,8 @@ int devtmpfs_mount(const char *mntdir)
if (!thread)
return 0;
- err = sys_mount("devtmpfs", (char *)mntdir, "devtmpfs", MS_SILENT, NULL);
+ err = ksys_mount("devtmpfs", (char *)mntdir, "devtmpfs", MS_SILENT,
+ NULL);
if (err)
printk(KERN_INFO "devtmpfs: error mounting %i\n", err);
else
@@ -382,7 +383,7 @@ static int devtmpfsd(void *p)
*err = sys_unshare(CLONE_NEWNS);
if (*err)
goto out;
- *err = sys_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, options);
+ *err = ksys_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, options);
if (*err)
goto out;
sys_chdir("/.."); /* will traverse into overmounted root */