tools headers UAPI: Sync linux/stat.h with the kernel sources

To pick the changes in:

  72d1249e2ffdbc34 ("uapi: fix statx attribute value overlap for DAX & MOUNT_ROOT")

That don't cause any change in tooling, just addresses this perf build
warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/stat.h' differs from latest version at 'include/uapi/linux/stat.h'
  diff -u tools/include/uapi/linux/stat.h include/uapi/linux/stat.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Eric Sandeen <sandeen@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/include/uapi/linux/stat.h b/tools/include/uapi/linux/stat.h
index 82cc58f..1500a0f 100644 (file)
--- a/tools/include/uapi/linux/stat.h
+++ b/tools/include/uapi/linux/stat.h
@@ -171,9 +171,12 @@ struct statx {
  * be of use to ordinary userspace programs such as GUIs or ls rather than
  * specialised tools.
  *
- * Note that the flags marked [I] correspond to generic FS_IOC_FLAGS
+ * Note that the flags marked [I] correspond to the FS_IOC_SETFLAGS flags
  * semantically.  Where possible, the numerical value is picked to correspond
- * also.
+ * also.  Note that the DAX attribute indicates that the file is in the CPU
+ * direct access state.  It does not correspond to the per-inode flag that
+ * some filesystems support.
+ *
  */
 #define STATX_ATTR_COMPRESSED          0x00000004 /* [I] File is compressed by the fs */
 #define STATX_ATTR_IMMUTABLE           0x00000010 /* [I] File is marked immutable */
@@ -183,7 +186,7 @@ struct statx {
 #define STATX_ATTR_AUTOMOUNT           0x00001000 /* Dir: Automount trigger */
 #define STATX_ATTR_MOUNT_ROOT          0x00002000 /* Root of a mount */
 #define STATX_ATTR_VERITY              0x00100000 /* [I] Verity protected file */
-#define STATX_ATTR_DAX                 0x00002000 /* [I] File is DAX */
+#define STATX_ATTR_DAX                 0x00200000 /* File is currently in DAX state */
 
 
 #endif /* _UAPI_LINUX_STAT_H */