linux-toradex.git/fs/fat/fatent.c, branch v4.2.3

fs/fat: remove unnecessary includes

2015-04-17T13:04:06+00:00

'fat.h' includes  which includes  which
includes all the header files required for all *.c files fat filesystem.

[akpm@linux-foundation.org: fs/fat/iode.c needs seq_file.h]
[sfr@canb.auug.org.au: put one actually necessary include file back]
Signed-off-by: Alexander Kuleshov 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Stephen Rothwell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: no need to reset EOF in ent_put for FAT32

2012-10-05T18:05:12+00:00

#define FAT_ENT_EOF(EOF_FAT32)

there is no need to reset value of 'new' for FAT32 as the values is
already correct

Signed-off-by: Namjae Jeon 
Signed-off-by: Amit Sahrawat 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fs/fat: fix checkpatch issues in fatent.c

2012-10-05T18:05:11+00:00

1: Stop any lines going over 80 characters
2: Remove a blank line before EXPORT_SYMBOL_GPL

Signed-off-by: Cruz Julian Bishop 
Acked-by: OGAWA Hirofumi 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: switch to fsinfo_inode

2012-06-01T00:49:28+00:00

Currently FAT file-system maps the VFS "superblock" abstraction to the
FSINFO block.  The FSINFO block contains non-essential data about the
amount of free clusters and the next free cluster.  FAT file-system can
always find out this information by scanning the FAT table, but having it
in the FSINFO block may speed things up sometimes.  So FAT file-system
relies on the VFS superblock write-out services to make sure the FSINFO
block is written out to the media from time to time.

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 FAT FSINFO block management from
'->write_super()'/'->s_dirt' to 'fsinfo_inode'/'->write_inode'.  Now,
instead of setting the 's_dirt' flag, we just mark the special
'fsinfo_inode' inode as dirty and let VFS invoke the '->write_inode'
call-back when needed, where we write-out the FSINFO block.

This patch also makes sure we do not mark the 'fsinfo_inode' inode as
dirty if we are not FAT32 (FAT16 and FAT12 do not have the FSINFO block)
or if we are in R/O mode.

As a bonus, we can also remove the '->sync_fs()' and '->write_super()' FAT
call-back function because they become unneeded.

Signed-off-by: Artem Bityutskiy 
Cc: OGAWA Hirofumi 
Cc: Al Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: mark superblock as dirty less often

2012-06-01T00:49:28+00:00

Preparation for further changes.  It touches few functions in fatent.c and
prevents them from marking the superblock as dirty unnecessarily often.
Namely, instead of marking it as dirty in the internal tight loops - do it
only once at the end of the functions.  And instead of marking it as dirty
while holding the FAT table lock, do it outside the lock.

The reason for this patch is that marking the superblock as dirty will
soon become a little bit heavier operation, so it is cleaner to do this
only when it is necessary.

Signed-off-by: Artem Bityutskiy 
Cc: OGAWA Hirofumi 
Cc: Al Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: introduce mark_fsinfo_dirty helper

2012-06-01T00:49:27+00:00

A preparation patch which introduces a 'mark_fsinfo_dirty()' helper
function which just sets the 's_dirt' flag to 1 so far.  I'll add more
code to this helper later, so I do not mark it as 'inline'.

Signed-off-by: Artem Bityutskiy 
Cc: OGAWA Hirofumi 
Cc: Al Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: Replace all printk with fat_msg()

2011-04-12T12:12:42+00:00

Replace all printk with fat_msg()

Signed-off-by: Alexey Fisher 
Signed-off-by: OGAWA Hirofumi

block: remove BLKDEV_IFL_WAIT

2010-09-16T18:52:58+00:00

All the blkdev_issue_* helpers can only sanely be used for synchronous
caller.  To issue cache flushes or barriers asynchronously the caller needs
to set up a bio by itself with a completion callback to move the asynchronous
state machine ahead.  So drop the BLKDEV_IFL_WAIT flag that is always
specified when calling blkdev_issue_* and also remove the now unused flags
argument to blkdev_issue_flush and blkdev_issue_zeroout.  For
blkdev_issue_discard we need to keep it for the secure discard flag, which
gains a more descriptive name and loses the bitops vs flag confusion.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

fat: do not send discards as barriers

2010-09-10T10:35:39+00:00

fat already uses synchronous discards, no need to add I/O barriers.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo 
Signed-off-by: Jens Axboe

block: pass gfp_mask and flags to sb_issue_discard

2010-09-10T10:35:38+00:00

We'll need to get rid of the BLKDEV_IFL_BARRIER flag, and to facilitate
that and to make the interface less confusing pass all flags explicitly.

Signed-off-by: Christoph Hellwig 
Acked-by: Mike Snitzer 
Signed-off-by: Tejun Heo 
Signed-off-by: Jens Axboe