Commits · d2e452aed400120929703104eeaeee0ebbf0a955 · xcap / xcap-capability-linux

Jul 24, 2011

VFS : mount lock scalability for internal mounts · 423e0ab0

Tim Chen authored 13 years ago


For a number of file systems that don't have a mount point (e.g. sockfs
and pipefs), they are not marked as long term. Therefore in
mntput_no_expire, all locks in vfs_mount lock are taken instead of just
local cpu's lock to aggregate reference counts when we release
reference to file objects.  In fact, only local lock need to have been
taken to update ref counts as these file systems are in no danger of
going away until we are ready to unregister them.

The attached patch marks file systems using kern_mount without
mount point as long term.  The contentions of vfs_mount lock
is now eliminated.  Before un-registering such file system,
kern_unmount should be called to remove the long term flag and
make the mount point ready to be freed.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

423e0ab0

Jul 20, 2011

fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers · 02c24a82

Josef Bacik authored 13 years ago

Btrfs needs to be able to control how filemap_write_and_wait_range() is called
in fsync to make it less of a painful operation, so push down taking i_mutex and
the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some
file systems can drop taking the i_mutex altogether it seems, like ext3 and
ocfs2. For correctness sake I just pushed everything down in all cases to make
sure that we keep the current behavior the same for everybody, and then each
individual fs maintainer can make up their mind about what to do from there.
Thanks,

Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

02c24a82

Jun 22, 2011

powerpc/85xx: fix NAND_CMD_READID read bytes number · c02a02ee

Shaohui Xie authored 13 years ago


when nand_get_flash_type() is called, it will read 8 bytes of ID instead of 5,
but the driver only read 5 bytes, so kernel will dump error messages like:

fsl-lbc ffe124000.localbus: read_byte beyond end of buffer
fsl-lbc ffe124000.localbus: read_byte beyond end of buffer
fsl-lbc ffe124000.localbus: read_byte beyond end of buffer

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

c02a02ee

Jun 21, 2011

net: remove mm.h inclusion from netdevice.h · b7f080cf

Alexey Dobriyan authored 13 years ago

Remove linux/mm.h inclusion from netdevice.h -- it's unused (I've checked manually).

To prevent mm.h inclusion via other channels also extract "enum dma_data_direction"
definition into separate header. This tiny piece is what gluing netdevice.h with mm.h
via "netdevice.h => dmaengine.h => dma-mapping.h => scatterlist.h => mm.h".
Removal of mm.h from scatterlist.h was tried and was found not feasible
on most archs, so the link was cutoff earlier.

Hope people are OK with tiny include file.

Note, that mm_types.h is still dragged in, but it is a separate story.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

b7f080cf

Jun 16, 2011

Change Ryan Mallon's email address across the kernel · 1c5454ee

Ryan Mallon authored 13 years ago


I no longer work at Bluewater Systems. Update my email address accordingly. I
have deleted my email address from C files rather than change it. This
was suggested by several people, since the commit from my new email
address will cause scripts/get_maintainer.pl to function properly. I
have not added the .mailmap entry as suggested by Joe because I think
it is no longer necessary if I touch all the files which had my name
in them.

Signed-off-by: Ryan Mallon <rmallon@gmail.com>
Cc: Andre Renaud <andre@bluewatersys.com>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Andrew Victor <avictor.za@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Joe Perches <joe@perches.com>
Cc: Jesper Juhl <jj@chaosbits.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: trivial@kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1c5454ee

Jun 10, 2011

treewide: Convert uses of struct resource to resource_size(ptr) · 28f65c11

Joe Perches authored 13 years ago


Several fixes as well where the +1 was missing.

Done via coccinelle scripts like:

@@
struct resource *ptr;
@@

- ptr->end - ptr->start + 1
+ resource_size(ptr)

and some grep and typing.

Mostly uncompiled, no cross-compilers.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

28f65c11

Jun 07, 2011

UBI: remove dead code · 4788b60a

Artem Bityutskiy authored 13 years ago

Thanks to new gcc 4.6 for issuing the following warning:

drivers/mtd/ubi/vtbl.c: In function ‘create_vtbl’:
drivers/mtd/ubi/vtbl.c:311:33: warning: variable ‘old_seb’ set but not used [-Wunused-but-set-variable]

This patch removes some dead code and fixes the warning.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

4788b60a

Jun 01, 2011

UBI: dump stack when switching to R/O mode · 2a826061

Artem Bityutskiy authored 13 years ago


If we have debugging enabled and switching to R/O mode because of an error -
dump the stack to improve UBI error reporting and make the further diagnostics
easier to do.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

2a826061

UBI: fix oops in error path · 01a4110d

Artem Bityutskiy authored 13 years ago


This patch fixes an oops in the error path of 'ubi_attach_mtd_dev()'. If
anything after 'uif_init()' fails, we get an oops in 'cancel_pending()'. The
reason is that 'uif_close()' drops the last reference count for 'ubi->dev' and
whole 'struct ubi_device' is freed. And then
'ubi_wl_close()'->'cancel_pending()' tries to access the 'ubi' pointer and
problems begin.

Note, in 'ubi_detach_mtd_dev()' function we get a device reference to
work-around this issue. Do the same in the error path of
'ubi_attach_mtd_dev()'.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

01a4110d

UBI: switch debugging tests knobs to debugfs · cd6d8567

Artem Bityutskiy authored 13 years ago

Kill the UBI 'debug_tsts' module parameter and switch to debugfs. Create
per-test mode files there. E.g., to enable bit-flips emulation you may just do:

echo 1 > /sys/kernel/debug/ubi/ubi0/tst_emulate_bitflips

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

cd6d8567

UBI: make it possible to use struct ubi_device in debug.h · 18073733

Artem Bityutskiy authored 13 years ago


Current layout does not allow us to add inline functions to debug.h which use
the 'struct ubi_device' object, because it is undefined there. Move
'#include "debug.h"' in "ubi.h" down so to make 'struct ubi_device" be defined.
Additionally, this makes it possible to remove a bunch of forward declarations
in "debug.h". This is a preparation to the next patch.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

18073733

UBI: prepare debugging stuff to further debugfs conversion · 27a0f2a3

Artem Bityutskiy authored 13 years ago

We'll need the 'struct ubi_device *ubi' pointer in every debugging function (to
access the ->dbg field), so add this pointer to all the functions implementing
UBI debugging test modes like 'ubi_dbg_is_bitflip()' etc.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

27a0f2a3

UBI: use debugfs for the extra checks knobs · 2a734bb8

Artem Bityutskiy authored 13 years ago

This patch introduces debugfs support to UBI. All the UBI stuff is kept in the
"ubi" debugfs directory, which contains per-UBI device "ubi/ubiX"
sub-directories, containing debugging files. This file also creates
"ubi/ubiX/chk_gen" and "ubi/ubiX/chk_io" knobs for switching general and I/O
extra checks on and off. And it removes the 'debug_chks' UBI module parameters.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

2a734bb8

May 31, 2011

UBI: change the interface of a debugging check function · d99383b0

Artem Bityutskiy authored 13 years ago


This is a minor preparational patch which changes the
'paranoid_check_in_wl_tree()' function interface by adding the 'ubi' parameter
which will be needed there in the next patch.

And while on it, add "const" qualifier to the 'ubi' parameter of the
'paranoid_check_in_pq()' function.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

d99383b0

May 26, 2011

mtd: Use platform_data to retrieve tmio_nand platform bits · 7dc00a0d

Samuel Ortiz authored 13 years ago

With the addition of the platform device mfd_cell pointer, we can now
cleanly pass the sub device drivers platform data pointers through the
regular device platform_data one, and get rid of mfd_get_data().

Cc: Ian Molton <spyro@f2s.com>
Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Acked-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

7dc00a0d

May 24, 2011