summaryrefslogtreecommitdiffstats
Commit message (Collapse)AuthorAgeFilesLines
* s390/process: free vx save area when releasing tasksHendrik Brueckner2015-02-101-0/+8
| | | | | | | | | | | | | | | | | | | | | | If a task uses vector registers, a save area is allocated to save/restore register states. Free the save area when releasing the task. Found the Memory leak with kmemleak: unreferenced object 0x72885e00 (size 512): comm "vx-test", pid 26123, jiffies 4294945635 (age 256.810s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 01 db 71 06 41 .............q.A 00 00 00 00 00 00 00 00 24 f7 a9 a7 51 94 79 bb ........$...Q.y. backtrace: [<00000000002d1c8a>] kmem_cache_alloc_trace+0x272/0x3d0 [<00000000001014ac>] alloc_vector_registers+0x54/0x138 [<00000000001017c8>] data_exception+0x158/0x1b0 [<00000000008b551e>] pgm_check_handler+0x13e/0x180 [<00000000800008b6>] 0x800008b6 Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/hypfs: Eliminate hypfs intervalMichael Holzheu2015-02-102-40/+12
| | | | | | | | | | | | Currently the binary hypfs interfaces provides new data only once within an interval time of one second. This patch removes this restriction and now new data is returned immediately on every read on a hypfs binary file. This is done in order to allow more consistent snapshots for programs that read multiple hypfs binary files. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/hypfs: Add diagnose 0c supportMichael Holzheu2015-02-105-4/+184
| | | | | | | | | | | | | | | With this feature, you can read the CPU performance metrics provided by the z/VM diagnose 0C. This then allows to get the management time for each online CPU of the guest where the diagnose is executed. The new debugfs file /sys/kernel/debug/s390_hypfs/diag_0c exports the diag0C binary data to user space via an open/read/close interface. The binary data consists out of a header structure followed by an array that contains the diagnose 0c data for each online CPU. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cacheinfo: don't use smp_processor_id() in preemptible contextHeiko Carstens2015-02-101-2/+5
| | | | | | | | | | | | | show_cacheinfo() needs to access the cacheinfo structure of any online cpu. This was done with using smp_processor_id() as in index while in preemtible context. This means the cpu could be offline and the data be gone when it would be accessed. Better use any online cpu address and protect the data by get_online_cpus() and put_online_cpus(). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/zcrypt: fixed domain scanning problem (again)Ingo Tuchscherer2015-02-041-3/+7
| | | | | | | | | | Older machines with more then 16 domains need a special check before PQAP instructions can be processed. With commit 5bc334bff9a6e189 this check was reverted by accident. This patch re-establishes the additional code needed for checking the extended domains for older machines. Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/smp: increase maximum value of NR_CPUS to 512Heiko Carstens2015-01-301-3/+3
| | | | | | | With SMT we can have more than 256 CPUs. Let's make them available. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/jump label: use different nop instructionHeiko Carstens2015-01-292-7/+19
| | | | | | | | | | | Use a brcl 0,2 instruction for jump label nops during compile time, so we don't mix up the different nops during mcount/hotpatch call site detection. The initial jump label code instruction replacement will exchange these instructions with either a branch or a brcl 0,0 instruction. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/jump label: add sanity checksHeiko Carstens2015-01-291-14/+42
| | | | | | | | | Add sanity checks to verify that only expected code will be replaced. If the code patterns do not match print the code patterns and panic, since something went terribly wrong. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/mm: correct missing space when reporting user process faultsHendrik Brueckner2015-01-291-1/+1
| | | | | Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/dasd: cleanup profilingSebastian Ott2015-01-293-85/+27
| | | | | | | | | | | | | The dasd driver has a lot of duplicated code to handle dasd_global_profile. With this patch we use the same code for the global and the per device profiling data. Note that dasd_stats_write had to change slightly to maintain some odd differences between A) per device and global profile and B) proc and sysfs interface usage. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/dasd: add locking for global_profile accessSebastian Ott2015-01-293-14/+24
| | | | | | | | | | Access to DASDs global statistics is done without locking which can lead to inconsistent data. Add locking to fix this. Also move the relevant structs in a global dasd_profile struct. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/ftrace: hotpatch support for function tracingHeiko Carstens2015-01-298-7/+52
| | | | | | | | | | | | | | | Make use of gcc's hotpatch support to generate better code for ftrace function tracing. The generated code now contains only a six byte nop in each function prologue instead of a 24 byte code block which will be runtime patched to support function tracing. With the new code generation the runtime overhead for supporting function tracing is close to zero, while the original code did show a significant performance impact. Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* ftrace: let notrace function attribute disable hotpatching if necessaryHeiko Carstens2015-01-291-0/+4
| | | | | | | | | | | | | | gcc supports an s390 specific function attribute called "hotpatch". It can be used to specify the number of halfwords that shall be added before and after a function and which shall be filled with nops for runtime patching. s390 will use the hotpatch attribute for function tracing, therefore make sure that the notrace function attribute either disables the mcount call or in case of hotpatch nop generation. Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* ftrace: allow architectures to specify ftrace compile optionsHeiko Carstens2015-01-298-14/+19
| | | | | | | | | | | | | If the kernel is compiled with function tracer support the -pg compile option is passed to gcc to generate extra code into the prologue of each function. This patch replaces the "open-coded" -pg compile flag with a CC_FLAGS_FTRACE makefile variable which architectures can override if a different option should be used for code generation. Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: reintroduce diag 44 calls for cpu_relax()Heiko Carstens2015-01-292-5/+10
| | | | | | | | | | | | | | | | Christian Borntraeger reported that the now missing diag 44 calls (voluntary time slice end) does cause a performance regression for stop_machine() calls if a machine has more virtual cpus than the host has physical cpus. This patch mainly reverts 57f2ffe14fd125c2 ("s390: remove diag 44 calls from cpu_relax()") with the exception that we still do not issue diag 44 calls if running with smt enabled. Due to group scheduling algorithms when running in LPAR this would lead to significant latencies. However, when running in LPAR we do not have more virtual than physical cpus. Reported-and-tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/zcrypt: Add support for new crypto express (CEX5S) adapter.Ingo Tuchscherer2015-01-234-9/+29
| | | | | | | | Extends the generic cryptographic device driver (zcrypt) to support the Crypto Express 5S adapter. Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/zcrypt: Number of supported ap domains is not retrievable.Ingo Tuchscherer2015-01-231-41/+96
| | | | | | | | | | | | | | | | | | | Upcoming versions of secure key management facilities (CCA and EP11) require information about the maximum number of supported ap domains in order to service TKE requests properly. With IBM z13 the number of available domains (so far 16) has increased up to 85. This number varies depending on machine types and models. Therefore the new sysfs attribute 'ap_max_domain_id' provides this limit of supported ap domains. Upcoming releases for CCA and EP11 will use this new information. Without this problem fix it is not possible to retrieve reliable information about the maximum number of supported ap domains. Thus, customers are not able to perform key management for CCA and EP11 coprocessor adapters. Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com> Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/spinlock: add compare-and-delay to lock wait loopsMartin Schwidefsky2015-01-233-7/+66
| | | | | | | | | | | | Add the compare-and-delay instruction to the spin-lock and rw-lock retry loops. A CPU executing the compare-and-delay instruction stops until the lock value has changed. This is done to make the locking code for contended locks to behave better in regard to the multi- hreading facility. A thread of a core executing a compare-and-delay will allow the other threads of a core to get a larger share of the core resources. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/tape: remove redundant if statementMartin Schwidefsky2015-01-221-7/+5
| | | | | | | | | | The unit check handler for 3480 / 3490 tapes used to print a different warning message for erpa code 0x57 dependent on the device type. The warning messages have been remove in a cleanup, the if statement is a left over. Remove it. Reported-by: Fraser Brown <mlfbrown@stanford.edu> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/hvc_iucv: add simple wildcard matches to the iucv allow filterHendrik Brueckner2015-01-221-7/+24
| | | | | | | | | | | | Introduce a wildcard character to filter a range of z/VM user IDs with a single filter entry. Only the leading portion up to the wildcard of an filter entry contributes to the match. This reduces the filter size and avoids configuration updates when deploying new terminal server instances. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/hmcdrv: free memory on error pathChristophe Jaillet2015-01-221-3/+3
| | | | | | | | | | Free allocated page in case of error returned by hmcdrv_ftp_startup. [heiko.carstens@de.ibm.com]: slightly changed Christophe's patch Signed-off-by: Christophe Jaillet <christophe.jaillet@wanadoo.fr> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: update default configurationMartin Schwidefsky2015-01-225-7/+5
| | | | Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/smp: remove check for CONFIG_ZFCPDUMPPaul Bolle2015-01-221-1/+1
| | | | | | | | | | | | | | | Commit 725908110a1f ("s390: add SMT support") added a check for CONFIG_ZFCPDUMP. But the Kconfig symbol ZFCPDUMP was removed in v3.16 through commit bf28a5970de3 ("s390/dump: Remove CONFIG_ZFCPDUMP"). So this check will always evaluate to false. No one noticed probably because the code also checks for CONFIG_CRASH_DUMP which "also enables s390 zfcpdump". Dump the unneeded check. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* dcssblk: issue warning when trying to save SN/EN type DCSSGerald Schaefer2015-01-221-2/+13
| | | | | | | | | The content of a DCSS of type SN or EN cannot be saved. Issue a warning when trying to save such a DCSS. Depending on the setup, this may be a user error or intended behaviour e.g. with a multi-DCSS device. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: add SMT supportMartin Schwidefsky2015-01-2218-118/+430
| | | | | | | | | | | | | | | | | | | | The multi-threading facility is introduced with the z13 processor family. This patch adds code to detect the multi-threading facility. With the facility enabled each core will surface multiple hardware threads to the system. Each hardware threads looks like a normal CPU to the operating system with all its registers and properties. The SCLP interface reports the SMT topology indirectly via the maximum thread id. Each reported CPU in the result of a read-scp-information is a core representing a number of hardware threads. To reflect the reduced CPU capacity if two hardware threads run on a single core the MT utilization counter set is used to normalize the raw cputime obtained by the CPU timer deltas. This scaled cputime is reported via the taskstats interface. The normal /proc/stat numbers are based on the raw cputime and are not affected by the normalization. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: avoid z13 cache aliasingMartin Schwidefsky2015-01-225-18/+155
| | | | | | | | Avoid cache aliasing on z13 by aligning shared objects to multiples of 512K. The virtual addresses of a page from a shared file needs to have identical bits in the range 2^12 to 2^18. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: add z13 code generation supportMartin Schwidefsky2015-01-224-1/+26
| | | | | | Allow to generate code that only runs on z13 machines. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/hmcdrv: remove unnecessary version.h inclusionSyam Sidhardhan2015-01-151-1/+0
| | | | | | | | version.h inclusion is not necessary as detected by versioncheck. Signed-off-by: Syam Sidhardhan <s.syam@samsung.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/docs: Remove section about script debugging from Debugging390.txtThomas Huth2015-01-151-29/+0
| | | | | | | | | The section about debugging scripting languages has nothing to do with s390 (and the example is even apparently taken from a i586 host instead), so let's remove this chapter from the file. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/docs: Break long lines in Debugging390.txtThomas Huth2015-01-151-227/+237
| | | | | | | | | | | There are a lot of lines that are longer than 80 columns in this file, rendering it hard to read in a terminal window. This patch fixes most of these long lines, and while we're at it, also makes some sentences more readable, e.g. by replacing "&" with "and", adding proper punctuation, removing superfluous clauses, etc. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: move cacheinfo sysfs to generic cacheinfo infrastructureSudeep Holla2015-01-081-296/+92
| | | | | | | | | | | This patch removes the redundant sysfs cacheinfo code by reusing the newly introduced generic cacheinfo infrastructure through the commit 246246cbde5e ("drivers: base: support cpu cache information interface to userspace via sysfs") Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/crypto: remove 'const' to avoid compiler warningsChen Gang2015-01-081-2/+2
| | | | | | | | | | | | | | | | | | | | | In aes_encrypt() and aes_decrypt(), need let 'sctx->key' be modified, so remove 'const' for it. The related warnings: CC [M] arch/s390/crypto/aes_s390.o arch/s390/crypto/aes_s390.c: In function 'aes_encrypt': arch/s390/crypto/aes_s390.c:146:37: warning: passing argument 2 of 'crypt_s390_km' discards 'const' qualifier from pointer target type [-Wdiscarded-array-qualifiers] crypt_s390_km(KM_AES_128_ENCRYPT, &sctx->key, out, in, ^ ... In file included from arch/s390/crypto/aes_s390.c:29:0: arch/s390/crypto/crypt_s390.h:154:19: note: expected 'void *' but argument is of type 'const u8 (*)[32] {aka const unsigned char (*)[32]}' static inline int crypt_s390_km(long func, void *param, ^ Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: remove unnecessary KERN_CONTJoe Perches2015-01-081-1/+1
| | | | | | | | | | | This has no effect as KERN_CONT is an empty string, It's probably just a missing conversion artifact as the other pr_cont uses in the same file don't have this prefix. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: sign extend return value of _sclp_print_early()Heiko Carstens2015-01-081-1/+2
| | | | | | | | | | _sclp_print_early() has a return value, but misses to sign extend it if called from 64 bit code. This is not really a bug, since currently no caller cares what the return value is. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: fix declaration of _sclp_print_early()Chen Gang2015-01-082-2/+3
| | | | | | | | | | | | | | | | | | | | _sclp_print_early() has return value: at present, return 0 for OK, 1 for failure. It returns '%r2', so use 'long' as return value (upper caller can check '%r2' directly). The related warning: CC arch/s390/boot/compressed/misc.o arch/s390/boot/compressed/misc.c:66:8: warning: type defaults to 'int' in declaration of '_sclp_print_early' [-Wimplicit-int] extern _sclp_print_early(const char *); ^ At present, _sclp_print_early() is only used by puts(), so can still remain its declaration in 'misc.c' file. [heiko.carstens@de.ibm.com]: move declaration to sclp.h header file Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: keep Kconfig sortedHeiko Carstens2015-01-081-1/+1
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: idset.c: remove some unused functionsRickard Strandqvist2015-01-082-22/+0
| | | | | | | | | | | Removes some functions that are not used anywhere: idset_clear() idset_sch_get_first() This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/signal: add sys_sigreturn and sys_rt_sigreturn declarationsHeiko Carstens2015-01-081-1/+3
| | | | | | | | Get rid of sparse warnings like this one: arch/s390/kernel/signal.c:244:1: warning: symbol 'sys_sigreturn' was not declared. Should it be static? Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/pgtable: add unsigned long castsHeiko Carstens2015-01-081-3/+3
| | | | | | | Get rid of warnings like this one: warning: constant 0xffe0000000000000 is so big it is unsigned long Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/disassembler: remove indentical initializerHeiko Carstens2015-01-081-1/+0
| | | | | | Remove one of the two identical initializer entries. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/pci: add missing address space annotationHeiko Carstens2015-01-081-2/+2
| | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/ftrace: add code replacement sanity checksHeiko Carstens2015-01-081-46/+49
| | | | | | | Always verify that the to be replaced code matches what we expect to see. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/mm: avoid using pmd_to_page for !USE_SPLIT_PMD_PTLOCKSMartin Schwidefsky2015-01-081-2/+3
| | | | | | | | | | pmd_to_page() is only available if USE_SPLIT_PMD_PTLOCKS is defined. The use of pmd_to_page in the gmap code can cause compile errors if NR_CPUS is smaller than SPLIT_PTLOCK_CPUS. Do not use pmd_to_page outside of USE_SPLIT_PMD_PTLOCKS sections. Reported-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/timex: fix get_tod_clock_ext() inline assemblyChen Gang2015-01-072-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | For C language, it treats array parameter as a pointer, so sizeof for an array parameter is equal to sizeof for a pointer, which causes compiler warning (with allmodconfig by gcc 5): ./arch/s390/include/asm/timex.h: In function 'get_tod_clock_ext': ./arch/s390/include/asm/timex.h:76:32: warning: 'sizeof' on array function parameter 'clk' will return size of 'char *' [-Wsizeof-array-argument] typedef struct { char _[sizeof(clk)]; } addrtype; ^ Can use macro CLOCK_STORE_SIZE instead of all related hard code numbers, which also can avoid this warning. And also add a tab to CLOCK_TICK_RATE definition to match coding styles. [heiko.carstens@de.ibm.com]: Chen's patch actually fixes a bug within the get_tod_clock_ext() inline assembly where we incorrectly tell the compiler that only 8 bytes of memory get changed instead of 16 bytes. This would allow gcc to generate incorrect code. Right now this doesn't seem to be the case. Also slightly changed the patch a bit. - renamed CLOCK_STORE_SIZE to STORE_CLOCK_EXT_SIZE - changed get_tod_clock_ext() to receive a char pointer parameter Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: wire up execveat syscallHeiko Carstens2014-12-182-1/+3
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/kernel: use stnsm 255 instead of stosm 0Christian Borntraeger2014-12-181-1/+1
| | | | | | | On some models, stnsm 255 might be slightly faster than stosm 0. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/vtime: Get rid of redundant WARN_ONChristian Borntraeger2014-12-181-2/+0
| | | | | | | | | | | | | | in the cpu time accounting function vtime_account_irq_enter (vtime_account_system) we use a WARN_ON_ONCE(!irqs_disabled()). This is redundant as the function virt_timer_forward is always called and has a BUG_ON(!irqs_disabled()). This saves several nanoseconds in my specific testcase (KVM entry/exit) and probably all other callers like (soft)irq entry/exit. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/zcrypt: kernel oops at insmod of the z90crypt device driverHarald Freudenberger2014-12-181-3/+7
| | | | | | | | | | | | | | | | | Kernel oops caused by invalid parameter at TAPQ instruction: On older systems where the QCI instruction is not available all possible domains are probed via TAPQ instruction. The range for the probe has been extended with the > 16 domain support now leading to a possible specification exception when this instruction is called for probing higher values within the new range. This may happen during insmod and/or ap bus reset only on machines without a QCI instruction (z10, z196, z114), zEC12 and newer systems are not affected. The fix modifies the domain checking function to limit the allowed range if no QCI info is available. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Ceph: remove left-over reject fileLinus Torvalds2014-12-181-10/+0
| | | | | | | | | | | | Neither Sage nor I noticed that Zheng Yan had mistakenly committed fs/ceph/super.h.rej as part of commit 31c542a199d7 ("ceph: add inline data to pagecache"). Remove it. Requested-by: Yan, Zheng <ukernel@gmail.com> Cc: Sage Weil <sweil@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2014-12-1829-180/+992
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull ceph updates from Sage Weil: "The big item here is support for inline data for CephFS and for message signatures from Zheng. There are also several bug fixes, including interrupted flock request handling, 0-length xattrs, mksnap, cached readdir results, and a message version compat field. Finally there are several cleanups from Ilya, Dan, and Markus. Note that there is another series coming soon that fixes some bugs in the RBD 'lingering' requests, but it isn't quite ready yet" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (27 commits) ceph: fix setting empty extended attribute ceph: fix mksnap crash ceph: do_sync is never initialized libceph: fixup includes in pagelist.h ceph: support inline data feature ceph: flush inline version ceph: convert inline data to normal data before data write ceph: sync read inline data ceph: fetch inline data when getting Fcr cap refs ceph: use getattr request to fetch inline data ceph: add inline data to pagecache ceph: parse inline data in MClientReply and MClientCaps libceph: specify position of extent operation libceph: add CREATE osd operation support libceph: add SETXATTR/CMPXATTR osd operations support rbd: don't treat CEPH_OSD_OP_DELETE as extent op ceph: remove unused stringification macros libceph: require cephx message signature by default ceph: introduce global empty snap context ceph: message versioning fixes ...
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 08:57:56 +0100