diff options
| author | Andi Drebes <lists-receive@programmierforen.de> | 2010-09-09 10:57:02 +0800 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-09-23 20:26:49 -0400 |
| commit | 09559bfe7bcd43965bf8d3090f6f761fd785d093 (patch) | |
| tree | da275d9fd829ab883a6312fa43e3386351dbcb3a /kerncompat.h | |
| parent | 075587c96c2f39e227847d13ca0ef305b13cd7d3 (diff) | |
multidevice support for check_mounted
Check_mount() should also work with multi device filesystems.
This patch adds checks that allow to detect if a file is a device
file used by a mounted single or multi device btrfs or if it is a
regular file used by a loopback device that is part of a mounted
single or multi device btrfs.
The single device checks also work for non-btrfs filesystems.
This might be helpful to prevent users from running btrfs programs
(e.g. mkfs.btrfs) accidentally on a filesystem used somewhere else.
Signed-off-by: Andi Drebes <lists-receive@programmierforen.de>
Diffstat (limited to 'kerncompat.h')
| -rw-r--r-- | kerncompat.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kerncompat.h b/kerncompat.h index e4c8ce0c..46236cd5 100644 --- a/kerncompat.h +++ b/kerncompat.h @@ -42,7 +42,11 @@ #define GFP_NOFS 0 #define __read_mostly #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + +#ifndef ULONG_MAX #define ULONG_MAX (~0UL) +#endif + #define BUG() abort() #ifdef __CHECKER__ #define __force __attribute__((force)) |