diff options
author | Ingo Molnar <mingo@kernel.org> | 2017-10-23 13:30:47 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2017-10-23 13:30:47 +0200 |
commit | f95b23a112f1a31ea042483540cd907b58d23a5f (patch) | |
tree | 3d41d2f8cf1d66ed593deb12f25a30d2905eb077 /lib | |
parent | x86/entry: Use SYSCALL_DEFINE() macros for sys_modify_ldt() (diff) | |
parent | x86/unwind: Show function name+offset in ORC error messages (diff) | |
download | linux-f95b23a112f1a31ea042483540cd907b58d23a5f.tar.xz linux-f95b23a112f1a31ea042483540cd907b58d23a5f.zip |
Merge branch 'x86/urgent' into x86/asm, to pick up dependent fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Kconfig.debug | 147 | ||||
-rw-r--r-- | lib/idr.c | 4 | ||||
-rw-r--r-- | lib/locking-selftest.c | 2 | ||||
-rw-r--r-- | lib/lz4/lz4_decompress.c | 4 | ||||
-rw-r--r-- | lib/ratelimit.c | 4 |
5 files changed, 82 insertions, 79 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7566eff22236..ff21b4dbb392 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1092,8 +1092,8 @@ config PROVE_LOCKING select DEBUG_MUTEXES select DEBUG_RT_MUTEXES if RT_MUTEXES select DEBUG_LOCK_ALLOC - select LOCKDEP_CROSSRELEASE - select LOCKDEP_COMPLETIONS + select LOCKDEP_CROSSRELEASE if BROKEN + select LOCKDEP_COMPLETIONS if BROKEN select TRACE_IRQFLAGS default n help @@ -1590,6 +1590,54 @@ config LATENCYTOP source kernel/trace/Kconfig +config PROVIDE_OHCI1394_DMA_INIT + bool "Remote debugging over FireWire early on boot" + depends on PCI && X86 + help + If you want to debug problems which hang or crash the kernel early + on boot and the crashing machine has a FireWire port, you can use + this feature to remotely access the memory of the crashed machine + over FireWire. This employs remote DMA as part of the OHCI1394 + specification which is now the standard for FireWire controllers. + + With remote DMA, you can monitor the printk buffer remotely using + firescope and access all memory below 4GB using fireproxy from gdb. + Even controlling a kernel debugger is possible using remote DMA. + + Usage: + + If ohci1394_dma=early is used as boot parameter, it will initialize + all OHCI1394 controllers which are found in the PCI config space. + + As all changes to the FireWire bus such as enabling and disabling + devices cause a bus reset and thereby disable remote DMA for all + devices, be sure to have the cable plugged and FireWire enabled on + the debugging host before booting the debug target for debugging. + + This code (~1k) is freed after boot. By then, the firewire stack + in charge of the OHCI-1394 controllers should be used instead. + + See Documentation/debugging-via-ohci1394.txt for more information. + +config DMA_API_DEBUG + bool "Enable debugging of DMA-API usage" + depends on HAVE_DMA_API_DEBUG + help + Enable this option to debug the use of the DMA API by device drivers. + With this option you will be able to detect common bugs in device + drivers like double-freeing of DMA mappings or freeing mappings that + were never allocated. + + This also attempts to catch cases where a page owned by DMA is + accessed by the cpu in a way that could cause data corruption. For + example, this enables cow_user_page() to check that the source page is + not undergoing DMA. + + This option causes a performance degradation. Use only if you want to + debug device drivers and dma interactions. + + If unsure, say N. + menu "Runtime Testing" config LKDTM @@ -1749,56 +1797,6 @@ config TEST_PARMAN If unsure, say N. -endmenu # runtime tests - -config PROVIDE_OHCI1394_DMA_INIT - bool "Remote debugging over FireWire early on boot" - depends on PCI && X86 - help - If you want to debug problems which hang or crash the kernel early - on boot and the crashing machine has a FireWire port, you can use - this feature to remotely access the memory of the crashed machine - over FireWire. This employs remote DMA as part of the OHCI1394 - specification which is now the standard for FireWire controllers. - - With remote DMA, you can monitor the printk buffer remotely using - firescope and access all memory below 4GB using fireproxy from gdb. - Even controlling a kernel debugger is possible using remote DMA. - - Usage: - - If ohci1394_dma=early is used as boot parameter, it will initialize - all OHCI1394 controllers which are found in the PCI config space. - - As all changes to the FireWire bus such as enabling and disabling - devices cause a bus reset and thereby disable remote DMA for all - devices, be sure to have the cable plugged and FireWire enabled on - the debugging host before booting the debug target for debugging. - - This code (~1k) is freed after boot. By then, the firewire stack - in charge of the OHCI-1394 controllers should be used instead. - - See Documentation/debugging-via-ohci1394.txt for more information. - -config DMA_API_DEBUG - bool "Enable debugging of DMA-API usage" - depends on HAVE_DMA_API_DEBUG - help - Enable this option to debug the use of the DMA API by device drivers. - With this option you will be able to detect common bugs in device - drivers like double-freeing of DMA mappings or freeing mappings that - were never allocated. - - This also attempts to catch cases where a page owned by DMA is - accessed by the cpu in a way that could cause data corruption. For - example, this enables cow_user_page() to check that the source page is - not undergoing DMA. - - This option causes a performance degradation. Use only if you want to - debug device drivers and dma interactions. - - If unsure, say N. - config TEST_LKM tristate "Test module loading with 'hello world' module" default n @@ -1873,18 +1871,6 @@ config TEST_UDELAY If unsure, say N. -config MEMTEST - bool "Memtest" - depends on HAVE_MEMBLOCK - ---help--- - This option adds a kernel parameter 'memtest', which allows memtest - to be set. - memtest=0, mean disabled; -- default - memtest=1, mean do 1 test pattern; - ... - memtest=17, mean do 17 test patterns. - If you are unsure how to answer this question, answer N. - config TEST_STATIC_KEYS tristate "Test static keys" default n @@ -1894,16 +1880,6 @@ config TEST_STATIC_KEYS If unsure, say N. -config BUG_ON_DATA_CORRUPTION - bool "Trigger a BUG when data corruption is detected" - select DEBUG_LIST - help - Select this option if the kernel should BUG when it encounters - data corruption in kernel memory structures when they get checked - for validity. - - If unsure, say N. - config TEST_KMOD tristate "kmod stress tester" default n @@ -1941,6 +1917,29 @@ config TEST_DEBUG_VIRTUAL If unsure, say N. +endmenu # runtime tests + +config MEMTEST + bool "Memtest" + depends on HAVE_MEMBLOCK + ---help--- + This option adds a kernel parameter 'memtest', which allows memtest + to be set. + memtest=0, mean disabled; -- default + memtest=1, mean do 1 test pattern; + ... + memtest=17, mean do 17 test patterns. + If you are unsure how to answer this question, answer N. + +config BUG_ON_DATA_CORRUPTION + bool "Trigger a BUG when data corruption is detected" + select DEBUG_LIST + help + Select this option if the kernel should BUG when it encounters + data corruption in kernel memory structures when they get checked + for validity. + + If unsure, say N. source "samples/Kconfig" diff --git a/lib/idr.c b/lib/idr.c index f9adf4805fd7..edd9b2be1651 100644 --- a/lib/idr.c +++ b/lib/idr.c @@ -146,8 +146,8 @@ EXPORT_SYMBOL(idr_get_next_ext); * idr_alloc() and idr_remove() (as long as the ID being removed is not * the one being replaced!). * - * Returns: 0 on success. %-ENOENT indicates that @id was not found. - * %-EINVAL indicates that @id or @ptr were not valid. + * Returns: the old value on success. %-ENOENT indicates that @id was not + * found. %-EINVAL indicates that @id or @ptr were not valid. */ void *idr_replace(struct idr *idr, void *ptr, int id) { diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c index cd0b5c964bd0..2b827b8a1d8c 100644 --- a/lib/locking-selftest.c +++ b/lib/locking-selftest.c @@ -2031,11 +2031,13 @@ void locking_selftest(void) print_testname("mixed read-lock/lock-write ABBA"); pr_cont(" |"); dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK); +#ifdef CONFIG_PROVE_LOCKING /* * Lockdep does indeed fail here, but there's nothing we can do about * that now. Don't kill lockdep for it. */ unexpected_testcase_failures--; +#endif pr_cont(" |"); dotest(rwsem_ABBA1, FAILURE, LOCKTYPE_RWSEM); diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c index bd3574312b82..141734d255e4 100644 --- a/lib/lz4/lz4_decompress.c +++ b/lib/lz4/lz4_decompress.c @@ -85,8 +85,8 @@ static FORCE_INLINE int LZ4_decompress_generic( const BYTE * const lowLimit = lowPrefix - dictSize; const BYTE * const dictEnd = (const BYTE *)dictStart + dictSize; - const unsigned int dec32table[] = { 0, 1, 2, 1, 4, 4, 4, 4 }; - const int dec64table[] = { 0, 0, 0, -1, 0, 1, 2, 3 }; + static const unsigned int dec32table[] = { 0, 1, 2, 1, 4, 4, 4, 4 }; + static const int dec64table[] = { 0, 0, 0, -1, 0, 1, 2, 3 }; const int safeDecode = (endOnInput == endOnInputSize); const int checkOffset = ((safeDecode) && (dictSize < (int)(64 * KB))); diff --git a/lib/ratelimit.c b/lib/ratelimit.c index 08f8043cac61..d01f47135239 100644 --- a/lib/ratelimit.c +++ b/lib/ratelimit.c @@ -48,7 +48,9 @@ int ___ratelimit(struct ratelimit_state *rs, const char *func) if (time_is_before_jiffies(rs->begin + rs->interval)) { if (rs->missed) { if (!(rs->flags & RATELIMIT_MSG_ON_RELEASE)) { - pr_warn("%s: %d callbacks suppressed\n", func, rs->missed); + printk_deferred(KERN_WARNING + "%s: %d callbacks suppressed\n", + func, rs->missed); rs->missed = 0; } } |