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* [S390] cleanup lowcore access from program checksMartin Schwidefsky2010-10-256-172/+110
| | | | | | | | | Read all required fields for program checks from the lowcore in the first level interrupt handler in entry[64].S. If the context that caused the fault was enabled for interrupts we can now re-enable the irqs in entry[64].S. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] pgtable: move pte_mkhuge() from hugetlb.h to pgtable.hHeiko Carstens2010-10-252-26/+28
| | | | | | | | | | All architectures besides s390 have pte_mkhuge() defined in pgtable.h. So move the function to pgtable.h on s390 as well. Fixes a compile error introduced with "hugetlb: hugepage migration core" in linux-next which only happens on s390. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] fix SIGBUS handlingMartin Schwidefsky2010-10-251-3/+11
| | | | | | | Raise SIGBUS with a siginfo structure. Deliver BUS_ADRERR as si_code and the address of the fault in the si_addr field. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: notify drivers of channel path eventsSebastian Ott2010-10-255-8/+75
| | | | | | | | | This patch adds a notification mechanism to inform ccw drivers about changes to channel paths, which occured while the device is online. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] css: update subchannel description after hibernateSebastian Ott2010-10-251-0/+1
| | | | | | | | Update the subchannel descriptor while resuming from hibernate in order to obtain current link addresses. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] css: update descriptor after hibernateSebastian Ott2010-10-252-2/+12
| | | | | | | | | | | | | Update the channel path descriptors after hibernation. This is done unlocked, since we are the only active task at this time. Note: chsc_determine_base_channel_path_desc is changed to use spin_lock_irqsave, since it's called with interrupts disabled in this case. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: update descriptor in chsc_chp_varySebastian Ott2010-10-253-9/+11
| | | | | | | | Update the channel path descriptor at the beginning of to the vary_on operation. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] chsc: use the global page to determine the chp desriptorSebastian Ott2010-10-253-44/+44
| | | | | | | | | | | | | | | | | | chsc_determine_channel_path_desc is called by a wrapper who allocates a response struct. The response data is then memcpy'ed to this response struct by chsc_determine_channel_path_desc. Change chsc_determine_base_channel_path_desc to use the global chsc_page and deliver it to the function doing the actual chsc call. The channel path desriptor is then directly read from the response data. As a result we get rid of the additional allocation for the response struct. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] chsc: consolidate memory allocationsSebastian Ott2010-10-253-136/+116
| | | | | | | | | | | | | | | | | | Most wrappers around the channel subsystem call have their own logic to allocate memory (with proper alignment) or use preallocated or static memory. This patch converts most users of the channel subsystem call to use the same preallocated page (proteced by a spinlock). Note: The sei_page which is used in our crw handler to call "store event information" has to coexist, since a) in crw context, while accessing the sei_page, sleeping is allowed (which will conflict with the spinlock protection of the chsc_page) b) in crw context, while accessing the sei_page, channel subsystem calls are allowed (which itself would require the page). Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] chsc: initialization fixesSebastian Ott2010-10-253-17/+17
| | | | | | | | | | | This patch fixes: * kfree vs. free_page usage * structure definition for determine_css_characteristics * naming convention for the chsc init function * deregistration of crw handlers in the cleanup path Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: add lock to struct channel_pathSebastian Ott2010-10-252-14/+27
| | | | | | | Serialize access to members of struct channel_path with a mutex. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: fix memleak in resume pathSebastian Ott2010-10-251-2/+6
| | | | | | | | | | | | | | | | | If a ccwdevice is lost during hibernation and a different ccwdevice is attached to the same subchannel, we will deregister the old ccw device and register the new one. Since deregistration is not allowed in this context, we handle this action later. However, some parts of the registration process for the new device were started anyway, so that the old device structure is no longer accessible. Fix this by deferring both actions to the afterwards scheduled subchannel event. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: remove custom implementation of hex_to_bin()Andy Shevchenko2010-10-251-6/+4
| | | | | Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd fix dump_sense_dbfStefan Haberland2010-10-251-6/+10
| | | | | | | | | | The dasd_eckd_dump_sense_dbf function uses a macro for s390 debug feature that can handle up to 8 parameters (for the DASD device driver). Fix the function to use only the maximum number of parameters. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] css: fix sparse warningSebastian Ott2010-10-251-1/+1
| | | | | | | | | | fix this sparse warning: drivers/s390/cio/css.c:580:6: warning: symbol 'css_schedule_eval_all_unreg' was not declared. Should it be static? Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] hvc_iucv: do not call iucv_unregister if iucv_register failedHendrik Brueckner2010-10-251-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | If the iucv_register() functions fails, the error recovery calls iucv_unregister() which might cause the following stack backtrace: (<0000000000100ab2> show_trace+0xee/0x144) <00000000004f1842> panic+0xb6/0x248 <00000000001010a6> die+0x15a/0x16c <000000000011d936> do_no_context+0xa6/0xe4 <00000000004f84dc> do_protection_exception+0x2e8/0x3a4 <0000000000113afc> pgm_exit+0x0/0x14 <00000000004e786e> iucv_unregister+0x5a/0x17c (<00000000004e785e> iucv_unregister+0x4a/0x17c) <000000000076de74> hvc_iucv_init+0x228/0x5dc <00000000001000c2> do_one_initcall+0x3e/0x19c <00000000007524a2> kernel_init+0x28e/0x404 <0000000000105dd6> kernel_thread_starter+0x6/0xc <0000000000105dd0> kernel_thread_starter+0x0/0xc Remove the call to iucv_unregister() and remove the goto label as unregistering is the last step in the hvc_iucv initialization. If iucv_register() fails, simply clean up hvc terminals and free resources. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cmm: fix crash on case conversionHeiko Carstens2010-10-251-1/+6
| | | | | | | | | | | | | When the cmm module is compiled into the kernel it will crash when writing to the R/O data section. Reason is the lower to upper case conversion of the "sender" module parameter which ignored the fact that the pointer is preinitialized. Introduced with 41b42876 "cmm, smsgiucv_app: convert sender to uppercase" Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] drivers/s390/char: Use static const char arraysJoe Perches2010-10-251-2/+2
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] switch_to: get rid of prev == next checkHeiko Carstens2010-10-251-2/+0
| | | | | | | | schedule() makes sure that prev != next before calling switch_to(). Therefore remove the redundant check. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] switch_to: dont restore/save access & fpu regs for kernel threadsHeiko Carstens2010-10-251-8/+12
| | | | | | | | | | | If the previous task was a kernel thread there is no need to save the contents of the fpu and access registers since they aren't used in kernel mode. For the same reason it is not necessary to restore these registers if the next task is a kernel thread. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Add config option for z196 code generation.Heiko Carstens2010-10-253-2/+15
| | | | | | | | Add a kernel config option for the IBM zEnterprise 196. This will produce faster code on newer compilers using the -march=z196 option. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sysinfo: display capacity adjustment indicatorHeiko Carstens2010-10-252-1/+11
| | | | | | | | Display machine capacity adjustment indicator and capacity change reason if available in /proc/sysinfo. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] add z196 instructions to kernel disassemblerMartin Schwidefsky2010-10-251-13/+132
| | | | | | Add the new instructions introduced with z196 to the kernel disassembler. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] add support for nonquiescing sskeMartin Schwidefsky2010-10-257-12/+18
| | | | | | | | Improve performance of the sske operation by using the nonquiescing variant if the affected page has no mappings established. On machines with no support for the new sske variant the mask bit will be ignored. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] store indication fault optimizationMartin Schwidefsky2010-10-253-3/+20
| | | | | | | | Use the store indication bit in the translation exception code on page faults to avoid the protection faults that immediatly follow the page fault if the access has been a write. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cpu hotplug/idle: move cpu_die call to enabled contextHeiko Carstens2010-10-251-5/+5
| | | | | | | | | | | | | | | | There is no difference if cpu_die is called from enabled or disabled context. Except that the fast_gup code might be called via cpu_die -> idle_task_exit -> __mm_drop -> crst_table_free. Which in turn grabs and releases a spinlock using the _bh ops, which is not allowed in irq disabled context, since spin_unlock_bh will unconditionally enable interrupts again. To get rid of the warning emitted by the softirq code just move the code to enabled context. In this case this doesn't fix a bug, we just get rid of a warning. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] lockless get_user_pages_fast()Martin Schwidefsky2010-10-259-27/+394
| | | | | | Implement get_user_pages_fast without locking in the fastpath on s390. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] set ARCH_HAS_SG_CHAIN for s390Christof Schmitt2010-10-251-0/+2
| | | | | | | | | Set ARCH_HAS_SG_CHAIN for scatter lists on s390. Without this flag the SCSI code limits the maximum number of segments, so set it to make proper use of the FCP channel hardware. Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] standardize Kbuild rulesHeiko Carstens2010-10-252-2/+8
| | | | | | | | | | | | Introducing this Kbuild file allow us to: make arch/s390/ And thus building all the core part of s390. Same as on other architectures. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: let recovery cqr inherit flags from failed cqrStefan Weinhuber2010-10-251-0/+3
| | | | | | | | | | | | The usual way to recover a failed DASD ECKD request (cqr) is to create a new request with an appropriate recovery CCW program. Certain features, e.g. failfast, can be enabled per request and are stored in the requests flags. These flags have to be copied from the failed to the recovery request, to let the recovery request use the same features as the original one. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] zero page cache synonymsMartin Schwidefsky2010-10-252-7/+64
| | | | | | | | | If the zero page is mapped to virtual user space addresses that differ only in bit 2^12 or 2^13 we get L1 cache synonyms which can affect performance. Follow the mips model and use multiple zero pages to avoid the synonyms. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge branch 'for-next' of ↵Linus Torvalds2010-10-24302-512/+359
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) Update broken web addresses in arch directory. Update broken web addresses in the kernel. Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget Revert "Fix typo: configuation => configuration" partially ida: document IDA_BITMAP_LONGS calculation ext2: fix a typo on comment in ext2/inode.c drivers/scsi: Remove unnecessary casts of private_data drivers/s390: Remove unnecessary casts of private_data net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data drivers/infiniband: Remove unnecessary casts of private_data drivers/gpu/drm: Remove unnecessary casts of private_data kernel/pm_qos_params.c: Remove unnecessary casts of private_data fs/ecryptfs: Remove unnecessary casts of private_data fs/seq_file.c: Remove unnecessary casts of private_data arm: uengine.c: remove C99 comments arm: scoop.c: remove C99 comments Fix typo configue => configure in comments Fix typo: configuation => configuration Fix typo interrest[ing|ed] => interest[ing|ed] Fix various typos of valid in comments ... Fix up trivial conflicts in: drivers/char/ipmi/ipmi_si_intf.c drivers/usb/gadget/rndis.c net/irda/irnet/irnet_ppp.c
| * Update broken web addresses in arch directory.Justin P. Mattock2010-10-1868-83/+46
| | | | | | | | | | | | | | | | | | | | | | The patch below updates broken web addresses in the arch directory. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Randy Dunlap <rdunlap@xenotime.net> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * Update broken web addresses in the kernel.Justin P. Mattock2010-10-18134-207/+183
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch below updates broken web addresses in the kernel Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Matt Turner <mattst88@gmail.com> Cc: Dimitry Torokhov <dmitry.torokhov@gmail.com> Cc: Mike Frysinger <vapier.adi@gmail.com> Acked-by: Ben Pfaff <blp@cs.stanford.edu> Acked-by: Hans J. Koch <hjk@linutronix.de> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * Revert "drivers/usb: Remove unnecessary return's from void functions" for ↵Jiri Kosina2010-10-061-0/+1
| | | | | | | | | | | | | | | | | | | | musb gadget This is a partial revert of 7f26b3a7533b ("drivers/usb: Remove unnecessary return's from void functions") as this hunk will vanish in USB tree completely. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * Revert "Fix typo: configuation => configuration" partiallyJiri Kosina2010-09-241-1/+1
| | | | | | | | | | | | | | | | This is a partial revert of 0b1974de66f ("Fix typo: configuation => configuration") as this hunk is removed in net-next. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * ida: document IDA_BITMAP_LONGS calculationNamhyung Kim2010-09-231-2/+5
| | | | | | | | | | | | | | | | | | | | IDA_BITMAP_LONGS value is calculated take into account struct ida_bitmap not to waste memory space. Comment it. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * ext2: fix a typo on comment in ext2/inode.cNamhyung Kim2010-09-231-2/+2
| | | | | | | | | | | | | | | | 'excpet' should be 'except'. 'ext3_get_branch' should be 'ext2_get_branch'. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * drivers/scsi: Remove unnecessary casts of private_dataJoe Perches2010-09-232-2/+2
| | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * drivers/s390: Remove unnecessary casts of private_dataJoe Perches2010-09-231-3/+3
| | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_dataJoe Perches2010-09-231-2/+2
| | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * drivers/infiniband: Remove unnecessary casts of private_dataJoe Perches2010-09-231-2/+2
| | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * drivers/gpu/drm: Remove unnecessary casts of private_dataJoe Perches2010-09-233-3/+3
| | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * kernel/pm_qos_params.c: Remove unnecessary casts of private_dataJoe Perches2010-09-231-1/+1
| | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * fs/ecryptfs: Remove unnecessary casts of private_dataJoe Perches2010-09-231-1/+1
| | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * fs/seq_file.c: Remove unnecessary casts of private_dataJoe Perches2010-09-231-3/+3
| | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * arm: uengine.c: remove C99 commentsH Hartley Sweeten2010-09-231-9/+9
| | | | | | | | | | | | | | | | Comments should be /* */ not //. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Jiri Kosina <trivial@kernel.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * arm: scoop.c: remove C99 commentsH Hartley Sweeten2010-09-231-6/+6
| | | | | | | | | | | | | | | | Comments should be /* */ not //. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Jiri Kosina <trivial@kernel.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * Fix typo configue => configure in commentsThomas Weber2010-09-235-5/+5
| | | | | | | | | | | | Signed-off-by: Thomas Weber <weber@corscience.de> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * Fix typo: configuation => configurationThomas Weber2010-09-235-7/+7
| | | | | | | | | | | | Signed-off-by: Thomas Weber <weber@corscience.de> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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