linux-toradex.git/drivers/s390/block, branch v2.6.21.4

[S390] dasd: Work around gcc bug.

2007-03-26T18:43:46+00:00

gcc incorrectly removes initialization of register 0 in dasd diag
inline assembly. Use different register to work around this compiler
bug.

Cc: Martin Schwidefsky 
Signed-off-by: Peter Oberparleiter 
Signed-off-by: Heiko Carstens

[S390] dasd: Use default recovery for SNSS requests

2007-03-05T22:35:52+00:00

For extended error reporting we sometimes have to start an
Sense Subsystem Status request (SNSS). When this request needs
to be recovered for some reason, the recovery request will
fail with 'command reject'.
Our usual recovery procedure will retry the failed request by
creating a new request and chaining the failed request from that
one. SNSS requests, though, must not be chained from anything,
so the recovery request will fail permanently.
Use the default recovery for SNSS request, which will just restart
the original request without further ado.

Signed-off-by: Stefan Weinhuber 
Signed-off-by: Martin Schwidefsky

[PATCH] mark struct file_operations const 5

2007-02-12T17:48:45+00:00

Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

Signed-off-by: Arjan van de Ven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[S390] Avoid excessive inlining.

2007-02-05T20:18:53+00:00

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[S390] ETR support.

2007-02-05T20:18:19+00:00

This patch adds support for clock synchronization to an external time
reference (ETR). The external time reference sends an oscillator
signal and a synchronization signal every 2^20 microseconds to keep
the TOD clocks of all connected servers in sync. For availability
two ETR units can be connected to a machine. If the clock deviates
for more than the sync-check tolerance all cpus get a machine check
that indicates that the clock is out of sync. For the lovely details
how to get the clock back in sync see the code below.

Signed-off-by: Martin Schwidefsky

[S390] dasd: fix unconditional reserve handling.

2007-02-05T20:17:24+00:00

The reserve/release IOCTLs sometimes do not work. If second system
does a 'steal lock' the pending unit check (Format 3 Msg F) is
delivered. Since ERP is disabled for reserve/release, the IOCTL call
fails. We have to allow basic ERP (retries) for reserve/release IOCTLs.

Signed-off-by: Horst Hummel 
Signed-off-by: Martin Schwidefsky

[S390] Remove dasd_ccw_log function.

2007-02-05T20:17:22+00:00

Logging of relevant information is already done by disciplines
dump_sense function.

Signed-off-by: Horst Hummel 
Signed-off-by: Martin Schwidefsky

[S390] Show loaded DCSS segments under /proc/iomem.

2007-02-05T20:17:11+00:00

Currently loaded DCSS segments are now listed in /proc/iomem with
their name followed by a trailing "(DCSS)".

Signed-off-by: Gerald Schaefer 
Signed-off-by: Martin Schwidefsky

[S390] dasd: fix bug in dasd initialization cleanup

2007-02-05T20:17:04+00:00

The initialization of the dasd_eer code is one of the last steps of the
dasd driver initialization. When initialization fails in one of the
earlier steps, the dasd_exit function is called to clean up what has been
done so far. So the dasd_eer_exit function may be called, although the
dasd_eer_init function wasn't called before and dasd_eer_exit tries to
unregister a misc device that wasn't registered, which results in a BUG.

Make sure that dasd_eer_exit can be called without initialization. Use a
dynamically allocated struct miscdevice instead of a static one, so we
only try to unregister the device if it exists and was actually registered.

Signed-off-by: Stefan Weinhuber 
Signed-off-by: Martin Schwidefsky

[S390] Get rid of a lot of sparse warnings.

2007-02-05T20:16:47+00:00

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky