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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-15 00:35:11 +0300
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 21:16:05 +0300
commit70f68ee81e2e9ad5105b8d2bd324e890e94c6ad9 (patch)
treee25ed255335d406923a23c38aa5980590ffefae4 /fs/sync.c
parent3ce4a7bf66263748194b77ccefd284be963c6304 (diff)
downloadlinux-70f68ee81e2e9ad5105b8d2bd324e890e94c6ad9.tar.xz
fs: add ksys_sync() helper; remove in-kernel calls to sys_sync()
Using this helper allows us to avoid the in-kernel calls to the sys_sync() 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_sync(). 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 'fs/sync.c')
-rw-r--r--fs/sync.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/sync.c b/fs/sync.c
index 6e0a2cbaf6de..602ae94bb67e 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -105,7 +105,7 @@ static void fdatawait_one_bdev(struct block_device *bdev, void *arg)
* just write metadata (such as inodes or bitmaps) to block device page cache
* and do not sync it on their own in ->sync_fs().
*/
-SYSCALL_DEFINE0(sync)
+void ksys_sync(void)
{
int nowait = 0, wait = 1;
@@ -117,6 +117,11 @@ SYSCALL_DEFINE0(sync)
iterate_bdevs(fdatawait_one_bdev, NULL);
if (unlikely(laptop_mode))
laptop_sync_completion();
+}
+
+SYSCALL_DEFINE0(sync)
+{
+ ksys_sync();
return 0;
}