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SubjectRe: [PATCH 17/45] fanotify: add do_fanotify_mark() helper; remove in-kernel call to syscall
On Thu 22-03-18 10:00:31, Dominik Brodowski wrote:
> Using the fs-internal do_fanotify_mark() helper allows us to get rid of
> the fs-internal call to the sys_fanotify_mark() syscall.
>
> This patch is part of a series which tries to remove in-kernel calls to
> syscalls. On this basis, the syscall entry path can be streamlined.
>
> Cc: Jan Kara <jack@suse.cz>
> Cc: Amir Goldstein <amir73il@gmail.com>
> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

Looks good. Feel free to add:

Acked-by: Jan Kara <jack@suse.cz>

Honza
> ---
> fs/notify/fanotify/fanotify_user.c | 14 ++++++++++----
> 1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
> index c07eb3d655ea..fa803a58a605 100644
> --- a/fs/notify/fanotify/fanotify_user.c
> +++ b/fs/notify/fanotify/fanotify_user.c
> @@ -820,9 +820,8 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
> return fd;
> }
>
> -SYSCALL_DEFINE5(fanotify_mark, int, fanotify_fd, unsigned int, flags,
> - __u64, mask, int, dfd,
> - const char __user *, pathname)
> +static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
> + int dfd, const char __user *pathname)
> {
> struct inode *inode = NULL;
> struct vfsmount *mnt = NULL;
> @@ -928,13 +927,20 @@ SYSCALL_DEFINE5(fanotify_mark, int, fanotify_fd, unsigned int, flags,
> return ret;
> }
>
> +SYSCALL_DEFINE5(fanotify_mark, int, fanotify_fd, unsigned int, flags,
> + __u64, mask, int, dfd,
> + const char __user *, pathname)
> +{
> + return do_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);
> +}
> +
> #ifdef CONFIG_COMPAT
> COMPAT_SYSCALL_DEFINE6(fanotify_mark,
> int, fanotify_fd, unsigned int, flags,
> __u32, mask0, __u32, mask1, int, dfd,
> const char __user *, pathname)
> {
> - return sys_fanotify_mark(fanotify_fd, flags,
> + return do_fanotify_mark(fanotify_fd, flags,
> #ifdef __BIG_ENDIAN
> ((__u64)mask0 << 32) | mask1,
> #else
> --
> 2.16.2
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR

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