- 14 Jul, 2008 40 commits
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Sebastian Ott authored
In some cases where the channel subsystem decides to drop a subchannel device device_unregister may be called twice, which results in an oops. The patch prevents this by only unregistering registered devices. Signed-off-by:
Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
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Akinobu Mita authored
Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Cc: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Akinobu Mita authored
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Akinobu Mita authored
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Akinobu Mita authored
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Julia Lawall authored
As noted by Akinobu Mita in patch b1fceac2, alloc_bootmem and related functions never return NULL and always return a zeroed region of memory. Thus a NULL test or memset after calls to these functions is unnecessary. drivers/s390/char/raw3270.c | 11 +---------- drivers/s390/char/sclp_con.c | 2 -- 2 files changed, 1 insertion(+), 12 deletions(-) This was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression E; statement S; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) ... when != E ( - BUG_ON (E == NULL); | - if (E == NULL) S ) @@ expression E,E1; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) ... when != E - memset(E,0,E1); // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Signed-off-by:
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Julia Lawall authored
As noted by Akinobu Mita in patch b1fceac2, alloc_bootmem and related functions never return NULL and always return a zeroed region of memory. Thus a NULL test or memset after calls to these functions is unnecessary. arch/s390/kernel/topology.c | 2 -- 1 file changed, 2 deletions(-) This was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression E; statement S; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) ... when != E ( - BUG_ON (E == NULL); | - if (E == NULL) S ) @@ expression E,E1; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) ... when != E - memset(E,0,E1); // </smpl> Signed-off-by:
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Heiko Carstens authored
Some macros in pgtable.h access members from struct task_struct. Currently always works since sched.h seems always to be included before asm/pgtable.h. Unfortunately that is not anymore true with Jeremy Fitzhardinge's ptep_modify_prot transaction abstraction patch. So fix this. Signed-off-by:
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Ralph Wuerthner authored
Add support for new micro code load of CEX2C and CEX2A adapters, which uses different IDs. This patch just adds the IDs to the existing drivers. Signed-off-by:
Ralph Wuerthner <ralph.wuerthner@de.ibm.com> Signed-off-by:
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Hendrik Brueckner authored
Now it is possible to specify additional kernel parameters on the IPL command line using the IPL PARM option. If the Linux system is already running, the new reipl sysfs attribute 'parm' can be used to change kernel parameters for the next reboot. Examples: IPL C PARM dasd=1234 root=/dev/dasda1 IPL 1234 PARM savesys=mylnxnss echo "init=/bin/bash" > /sys/firmware/reipl/ccw/parm Signed-off-by:
Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by:
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Felix Beck authored
The ap poll mechanism is converted to use a high-resolution timer for polling. This allows more specific polling. With this a new sysfs attribute is introduced to specify the polling rate in nanoseconds. Signed-off-by:
Felix Beck <felix.beck@de.ibm.com> Signed-off-by:
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Peter Oberparleiter authored
Fix a number of sclp_vt220 cleanup problems: * fix list_empty check after list_del() * mark init-only flag as __initdata * remove implicit dependency between slab_available() and num_pages * straighten multiple init handling (use init count) Signed-off-by:
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
The idle notifier chain consists of at most one element. So there's no point in having a notifier chain. Remove it and directly call the function. Signed-off-by:
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Cornelia Huck authored
This patch adds a driver for subchannels of type chsc. A device /dev/chsc is created which may be used to issue ioctls to: - obtain information about the machine's I/O configuration - dynamically change the machine's I/O configuration via asynchronous chsc commands Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
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Peter Oberparleiter authored
Do not send CHP_ONLINE/CHP_OFFLINE events to subchannel drivers when a channel-path configure request failed. Signed-off-by:
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Cornelia Huck authored
css_device_id exists, so use it for determining the right driver (and add a match_flags which is always 1 for valid types). Signed-off-by:
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Cornelia Huck authored
Passing the affected chpid in chp_event() worked only by chance since chpid is the first element in res_acc_data. Make it work properly by generalizing res_acc_data as chp_link and always passing around a properly filled out chp_link structure in chp_event(). Signed-off-by:
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Cornelia Huck authored
Use the new isc registration functions for all places that need an I/O interruption subclass. Signed-off-by:
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Sebastian Ott authored
This interface makes it easy for drivers to register usage of different I/O interruption subclasses without needing to worry about possible other users of the same isc. Signed-off-by:
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Cornelia Huck authored
Enhance the adapter interruption API so that device drivers can register a handler for a specific interruption subclass. This will allow different device drivers to move to differently prioritized subclasses in order to avoid congestion. Signed-off-by:
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Cornelia Huck authored
Replace the numeric values for I/O interruption subclass usage with abstract definitions and collect them all in asm/isc.h. This gives us a better overview of which iscs are actually used and makes it possible to better spread out isc usage in the future. Signed-off-by:
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Cornelia Huck authored
Checking for the validity of the css_*_characteristics is superfluous since they stay 0 for non-successful scsc. Signed-off-by:
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Martin Schwidefsky authored
Add support for clock synchronization with the server time protocol. Signed-off-by:
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Heiko Carstens authored
In case the initrd is located within the bss section it will be overwritten when the section is cleared. To prevent this just move the initrd right behind the bss section if it starts within the section. The current code already moves the initrd if the bootmem allocator bitmap would overwrite it. With this patch we should be safe against initrd corruptions. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
Add the user_regset definitions for normal and compat processes, replace the dump_regs core dump cruft with the generic CORE_DUMP_USER_REGSET and replace binfmt_elf32.c with the generic compat_binfmt_elf.c implementation. Signed-off-by:
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Sebastian Ott authored
Remove unnecessary ccw device locking inside ccw_device_oper_notify. Signed-off-by:
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Peter Oberparleiter authored
Provide functions which can be used to incrementally construct fcx enabled I/O control blocks. Signed-off-by:
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Peter Oberparleiter authored
Provide functions for assembling and starting fcx enabled I/O request blocks. Signed-off-by:
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Peter Oberparleiter authored
Extend the scsw data structure to the format required by fcx. Also provide helper functions for easier access to fields which are present in both the traditional as well as the modified format. Signed-off-by:
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Peter Oberparleiter authored
Introduce fcx bit to chsc characteristics. Signed-off-by:
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Cornelia Huck authored
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Cornelia Huck authored
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Cornelia Huck authored
Eliminate the need for the machine check handler to call into the common I/O layer directly by introducing an interface to register handlers for crws per rsc. Signed-off-by:
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Cornelia Huck authored
Rework the css driver methods to provide sane callbacks for subchannels of all types. As a bonus, this cleans up and simplyfies the machine check handling for I/O subchannels a lot. Signed-off-by:
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Cornelia Huck authored
Add modalias and subchannel type attributes for all subchannels. I/O subchannel specific attributes are now created in io_subchannel_probe(). modalias and subchannel type are also added to the uevent for the css bus. Also make the css modalias known. Signed-off-by:
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Cornelia Huck authored
Register all valid subchannels, not only I/O subchannels. Move I/O subchannel specific initialization to io_subchannel_probe(). Signed-off-by:
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Heiko Carstens authored
Using the ipldelay kernel parameter leads to a crash at IPL time. Since this is broken since a long time it looks like nobody is using it anymore. So remove it instead of fixing it. Signed-off-by:
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Heiko Carstens authored
smp_rescan_cpus() calls get_online_cpus() from a multithreaded workqueue context. This may deadlock. This is the same bug as in arch/s390/kernel/topology.c. This patch can be reverted as soon as Oleg's patch gets merged. Signed-off-by:
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