linux.git/fs/jffs2/wbuf.c, branch v4.2

[jffs2] kill wbuf_queued/wbuf_dwork_lock

2014-10-09T06:39:01+00:00

schedule_delayed_work() happening when the work is already pending is
a cheap no-op.  Don't bother with ->wbuf_queued logics - it's both
broken (cancelling ->wbuf_dwork leaves it set, as spotted by Jeff Harris)
and pointless.  It's cheaper to let schedule_delayed_work() handle that
case.

Reported-by: Jeff Harris 
Tested-by: Jeff Harris 
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro

JFFS2: don't fail on bitflips in OOB

2012-09-29T14:34:13+00:00

JFFS2 was designed without thought for OOB bitflips, it seems, but they
can occur and will be reported to JFFS2 via mtd_read_oob()[1]. We don't
want to fail on these transactions, since the data was corrected.

[1] Few drivers report bitflips for OOB-only transactions. With such
    drivers, this patch should have no effect.

Signed-off-by: Brian Norris 
Cc: stable@vger.kernel.org
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

jffs2: get rid of jffs2_sync_super

2012-05-31T01:04:52+00:00

Currently JFFS2 file-system maps the VFS "superblock" abstraction to the
write-buffer. Namely, it uses VFS services to synchronize the write-buffer
periodically.

The whole "superblock write-out" VFS infrastructure is served by the
'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and
writes out all dirty superblock using the '->write_super()' call-back. But the
problem with this thread is that it wastes power by waking up the system every
5 seconds no matter what. So we want to kill it completely and thus, we need to
make file-systems to stop using the '->write_super' VFS service, and then
remove it together with the kernel thread.

This patch switches the JFFS2 write-buffer management from
'->write_super()'/'->s_dirt' to a delayed work. Instead of setting the 's_dirt'
flag we just schedule a delayed work for synchronizing the write-buffer.

Signed-off-by: Artem Bityutskiy 
Signed-off-by: Al Viro

jffs2: Use pr_fmt and remove jffs: from formats

2012-03-26T23:40:19+00:00

Use pr_fmt to prefix KBUILD_MODNAME to appropriate logging messages.

Remove now unnecessary internal prefixes from formats.

Signed-off-by: Joe Perches 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

jffs2: Convert printks to pr_

2012-03-26T23:39:40+00:00

Use the more current logging style.

Coalesce formats, align arguments.
Convert uses of embedded function names to %s, __func__.

A couple of long line checkpatch errors I don't care about exist.

Signed-off-by: Joe Perches 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

jffs2: Convert most D1/D2 macros to jffs2_dbg

2012-03-26T23:39:24+00:00

D1 and D2 macros are mostly uses to emit debugging messages.

Convert the logging uses of D1 & D2 to jffs2_dbg(level, fmt, ...)
to be a bit more consistent style with the rest of the kernel.

All jffs2_dbg output is now at KERN_DEBUG where some of
the previous uses were emitted at various KERN_s.

Signed-off-by: Joe Perches 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: do not use mtd->block_markbad directly

2012-01-09T18:26:26+00:00

Instead, use the new 'mtd_can_have_bb()', or just rely on 'mtd_block_markbad()'
return code, which will be -EOPNOTSUPP if bad blocks are not supported.

Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: introduce mtd_block_markbad interface

2012-01-09T18:25:48+00:00

Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: introduce mtd_write_oob interface

2012-01-09T18:25:24+00:00

Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: introduce mtd_read_oob interface

2012-01-09T18:25:23+00:00

Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse