[MTD] Introduce MTD_BIT_WRITEABLE

o Add a flag MTD_BIT_WRITEABLE for devices that allow single bits to be
  cleared.
o Replace MTD_PROGRAM_REGIONS with a cleared MTD_BIT_WRITEABLE flag for
  STMicro and Intel Sibley flashes with internal ECC.  Those flashes
  disallow clearing of single bits, unlike regular NOR flashes, so the
  new flag models their behaviour better.
o Remove MTD_ECC.  After the STMicro/Sibley merge, this flag is only set
  and never checked.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>

1 files changed, 2 insertions, 4 deletions

diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index 1a6eb955e0be..743c9e52152d 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -105,9 +105,7 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
 #ifdef CONFIG_JFFS2_SUMMARY
 #define jffs2_can_mark_obsolete(c) (0)
 #else
-#define jffs2_can_mark_obsolete(c) \
-  ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & (MTD_PROGRAM_REGIONS))) || \
-   c->mtd->type == MTD_RAM)
+#define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE))
 #endif
 
 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
@@ -135,7 +133,7 @@ void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
 int jffs2_dataflash_setup(struct jffs2_sb_info *c);
 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
 
-#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_PROGRAM_REGIONS))
+#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE))
 int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
 void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);