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| author | Andrew Victor <andrew@sanpeople.com> | 2005-02-09 09:09:05 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@mtd.linutronix.de> | 2005-05-23 12:27:09 +0200 |
| commit | 3be36675d41a30ed3b192f92684f1417aa0f8bfe (patch) | |
| tree | da8395bb14ffef19e551c509c47d16b52fb536d9 /fs/jffs2/os-linux.h | |
| parent | 045e9a5d51ced27bfcbdb78071534ce6fd36b33d (diff) | |
| download | linux-3be36675d41a30ed3b192f92684f1417aa0f8bfe.tar.gz linux-3be36675d41a30ed3b192f92684f1417aa0f8bfe.tar.bz2 linux-3be36675d41a30ed3b192f92684f1417aa0f8bfe.zip | |
[JFFS2] Core changes required to support JFFS2-on-Dataflash devices.
DataFlash page-sizes are not a power of two (they're multiples of 528
bytes). There are a few places in JFFS2 code where sector_size is used
as a bitmask. A new macro (SECTOR_ADDR) was defined to calculate these
sector addresses. For non-DataFlash devices, the original (faster)
bitmask operation is still used.
In scan.c, the EMPTY_SCAN_SIZE was a constant of 1024.
Since this could be larger than the sector size of the DataFlash, this
is now basically set to MIN(sector_size, 1024).
Addition of a jffs2_is_writebuffered() macro.
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'fs/jffs2/os-linux.h')
| -rw-r--r-- | fs/jffs2/os-linux.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h index 03b0acc37b73..0412416d1f2d 100644 --- a/fs/jffs2/os-linux.h +++ b/fs/jffs2/os-linux.h @@ -7,7 +7,7 @@ * * For licensing information, see the file 'LICENCE' in this directory. * - * $Id: os-linux.h,v 1.51 2004/11/16 20:36:11 dwmw2 Exp $ + * $Id: os-linux.h,v 1.52 2005/02/09 09:09:01 pavlov Exp $ * */ @@ -97,7 +97,10 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) #endif } +#define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) ) + #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY) +#define jffs2_is_writebuffered(c) (c->wbuf != NULL) #if (!defined CONFIG_JFFS2_FS_NAND && !defined CONFIG_JFFS2_FS_NOR_ECC) #define jffs2_can_mark_obsolete(c) (1) |