linux-toradex.git/drivers/block, branch v2.6.23.15

Future of Linux 2.6.22.y series

2007-12-14T17:50:51+00:00

commit 5d0360ee96a5ef953dbea45873c2a8c87e77d59b upstream.

We have seen ramdisk based install systems, where some pages of mapped
libraries and programs were suddendly zeroed under memory pressure. This
should not happen, as the ramdisk avoids freeing its pages by keeping
them dirty all the time.

It turns out that there is a case, where the VM makes a ramdisk page
clean, without telling the ramdisk driver.  On memory pressure
shrink_zone runs and it starts to run shrink_active_list.  There is a
check for buffer_heads_over_limit, and if true, pagevec_strip is called.
pagevec_strip calls try_to_release_page. If the mapping has no
releasepage callback, try_to_free_buffers is called. try_to_free_buffers
has now a special logic for some file systems to make a dirty page
clean, if all buffers are clean. Thats what happened in our test case.

The simplest solution is to provide a noop-releasepage callback for the
ramdisk driver. This avoids try_to_free_buffers for ramdisk pages.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Jan Kara 
Acked-by: Nick Piggin 
Cc: "Eric W. Biederman" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

Fix "Fix DAC960 driver on machines which don't support 64-bit DMA"

2007-09-19T18:24:16+00:00

sparc32:

drivers/block/DAC960.c: In function 'DAC960_V1_EnableMemoryMailboxInterface':
drivers/block/DAC960.c:1168: error: 'DMA_32BIT_MASK' undeclared (first use in this function)
drivers/block/DAC960.c:1168: error: (Each undeclared identifier is reported only

Cc: 
Cc: 
Cc: Alessandro Polverini 
Cc: Jeff Garzik 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Fix DAC960 driver on machines which don't support 64-bit DMA

2007-09-12T00:21:19+00:00

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=8942

Use PCI_DMA_* constants instead of own private definitions Fall back to
32-bit DMA mask if a 64-bit one fails

Signed-off-by: Matthew Wilcox 
Acked-by: Jeff Garzik 
Tested-by: Lars 
Cc: Alessandro Polverini 
Cc: 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[SUNVDC]: Use slice 0xff on VD_DISK_TYPE_DISK.

2007-08-27T01:49:07+00:00

While debugging issues with the VDS server I made the
driver use partition 2 to get at the whole disk since
this is the "whole disk" partition in the Sun disk
label.

We really should use slice 0xff which really means
the whole physical disk in the VIO disk protocol.
Otherwise things won't work well on a disk image
that doesn't have a proper disk label on it.

Signed-off-by: David S. Miller

Introduce CONFIG_CHECK_SIGNATURE

2007-08-23T02:52:45+00:00

Introduce CONFIG_CHECK_SIGNATURE to control inclusion of check_signature()
and avoid problems on platforms that don't have readb().

Let the few legacy (ISA || PCI || X86) drivers that need check_signature()
select CONFIG_CHECK_SIGNATURE.

Signed-off-by: Geert Uytterhoeven 
Cc: Jeff Dike 
Cc: Heiko Carstens 
Cc: Roman Zippel 
Cc: Alan Cox 
Cc: Martin Schwidefsky 
Cc: Russell King 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Add some help texts to recently-introduced kconfig items

2007-08-18T16:52:50+00:00

Signed-off-by: Jan Engelhardt 
Signed-off-by: Stefan Richter  (edited MACINTOSH_DRIVERS per Geert Uytterhoeven's remark)
Signed-off-by: Linus Torvalds

Enable partitions for lguest block device

2007-08-18T16:45:51+00:00

The lguest block device only requests one minor, which means
partitions don't work (eg "root=/dev/lgba1").

Let's follow the crowd and ask for 16.

Signed-off-by: Rusty Russell 
Signed-off-by: Linus Torvalds

sysace: HDIO_GETGEO has it's own method for ages

2007-08-11T20:34:48+00:00

The way this driver tries to implement HDIO_GETGEO it'll never be called.
Then again on ppc it probably will never be called anyway because it's
utterly pointless.

Signed-off-by: Christoph Hellwig 
Cc: Grant Likely 
Signed-off-by: Andrew Morton 
Signed-off-by: Jens Axboe

drivers/block/cpqarray.c: better error handling and kmalloc + memset conversion to k[cz]alloc

2007-08-11T20:34:48+00:00

This patch removes some redundant casts, does the kmalloc + memset to
k[cz]alloc conversion and it changes the error path to use goto (to avoid code
duplication).

 drivers/block/cpqarray.c | 49567 -> 48623 (-944 bytes)
 drivers/block/cpqarray.o | 178820 -> 178288 (-532 bytes)

Signed-off-by: Mariusz Kozlowski 
Acked-by: Mike Miller 
Signed-off-by: Andrew Morton 
Signed-off-by: Jens Axboe

drivers/block/cciss.c: kmalloc + memset conversion to kzalloc

2007-08-11T20:34:48+00:00

 drivers/block/cciss.c | 104285 -> 104168 (-117 bytes)
 drivers/block/cciss.o | 277400 -> 277124 (-276 bytes)

Signed-off-by: Mariusz Kozlowski 
Acked-by: Mike Miller 
Signed-off-by: Andrew Morton 
Signed-off-by: Jens Axboe