[PATCH 0/3] Backport statx(..., NULL, AT_EMPTY_PATH, ...)

[Miao Wang via B4 Relay <devnull+shankerwangmiao.gmail.com@kernel.org>]

Commit 0ef625bba6fb ("vfs: support statx(..., NULL, AT_EMPTY_PATH,
...)") added support for passing in NULL when AT_EMPTY_PATH is given,
improving performance when statx is used for fetching stat informantion
from a given fd, which is especially important for 32-bit platforms.
This commit also improved the performance when an empty string is given
by short-circuiting the handling of such paths.

This series is based on the commits in the Linus’ tree. Sligth
modifications are applied to the context of the patches for cleanly
applying.

Tested-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Miao Wang <shankerwangmiao@gmail.com>
---
Christian Brauner (2):
      fs: new helper vfs_empty_path()
      stat: use vfs_empty_path() helper

Mateusz Guzik (1):
      vfs: support statx(..., NULL, AT_EMPTY_PATH, ...)

 fs/internal.h      |  14 ++++++
 fs/namespace.c     |  13 ------
 fs/stat.c          | 123 ++++++++++++++++++++++++++++++++++++-----------------
 include/linux/fs.h |  17 ++++++++
 4 files changed, 116 insertions(+), 51 deletions(-)
---
base-commit: 049be94099ea5ba8338526c5a4f4f404b9dcaf54
change-id: 20240918-statx-stable-linux-6-10-y-17c3ec7497c8

Best regards,
-- 
Miao Wang <shankerwangmiao@gmail.com>