- 15 12月, 2008 1 次提交
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由 Russell King 提交于
... for the removal of it from asm-generic/local.h Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 06 9月, 2008 2 次提交
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由 Russell King 提交于
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 05 9月, 2008 1 次提交
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由 Russell King 提交于
arch/arm/kernel/process.c:270:6: warning: symbol 'show_fpregs' was not declared. Should it be static? This function isn't used, so can be removed. arch/arm/kernel/setup.c:532:9: warning: symbol 'len' shadows an earlier one arch/arm/kernel/setup.c:524:6: originally declared here A function containing two 'len's. arch/arm/mm/fault-armv.c:188:13: warning: symbol 'check_writebuffer_bugs' was not declared. Should it be static? arch/arm/mm/mmap.c:122:5: warning: symbol 'valid_phys_addr_range' was not declared. Should it be static? arch/arm/mm/mmap.c:137:5: warning: symbol 'valid_mmap_phys_addr_range' was not declared. Should it be static? Missing includes. arch/arm/kernel/traps.c:71:77: warning: Using plain integer as NULL pointer arch/arm/mm/ioremap.c:355:46: error: incompatible types in comparison expression (different address spaces) Sillies. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 01 9月, 2008 1 次提交
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由 Nicolas Pitre 提交于
As mentioned in commit 79696910, and because of commit b03a5b75, the direct calling of kprobe_trap_handler() can be removed. Signed-off-by: NNicolas Pitre <nico@marvell.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 13 8月, 2008 1 次提交
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由 Russell King 提交于
Calling the undefined instruction handler functions with a spinlock held is a recipe for must_sleep() warnings. Avoid it. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 24 7月, 2008 1 次提交
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由 Jason Wessel 提交于
This patch adds the ARCH=arm specific a kgdb backend, originally written by Deepak Saxena <dsaxena@plexity.net> and George Davis <gdavis@mvista.com>. Geoff Levand <geoffrey.levand@am.sony.com>, Nicolas Pitre, Manish Lachwani, and Jason Wessel have contributed various fixups here as well. The KGDB patch makes one change to the core ARM architecture such that the traps are initialized early for use with the debugger or other subsystems. [ mingo@elte.hu: small cleanups. ] [ ben-linux@fluff.org: fixed early_trap_init ] Signed-off-by: NJason Wessel <jason.wessel@windriver.com> Acked-by: NDeepak Saxena <dsaxena@plexity.net>
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- 26 1月, 2008 2 次提交
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由 Nicolas Pitre 提交于
The kprobes code is already able to cope with reentrant probes, so its handler must be called outside of the region protected by undef_lock. If ever this lock is released when handlers are called then this commit could be reverted. Signed-off-by: NNicolas Pitre <nico@marvell.com>
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由 Nicolas Pitre 提交于
Signed-off-by: NNicolas Pitre <nico@marvell.com>
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- 27 11月, 2007 2 次提交
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由 Nicolas Pitre 提交于
The ARM __kuser_cmpxchg routine is meant to implement an atomic cmpxchg in user space. It however can produce spurious false negative if a processor exception occurs in the middle of the operation. Normally this is not a problem since cmpxchg is typically called in a loop until it succeeds to implement an atomic increment for example. Some use cases which don't involve a loop require that the operation be 100% reliable though. This patch changes the implementation so to reattempt the operation after an exception has occurred in the critical section rather than abort it. Here's a simple program to test the fix (don't use CONFIG_NO_HZ in your kernel as this depends on a sufficiently high interrupt rate): #include <stdio.h> typedef int (__kernel_cmpxchg_t)(int oldval, int newval, int *ptr); #define __kernel_cmpxchg (*(__kernel_cmpxchg_t *)0xffff0fc0) int main() { int i, x = 0; for (i = 0; i < 100000000; i++) { int v = x; if (__kernel_cmpxchg(v, v+1, &x)) printf("failed at %d: %d vs %d\n", i, v, x); } printf("done with %d vs %d\n", i, x); return 0; } Signed-off-by: NNicolas Pitre <nico@marvell.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Nicolas Pitre 提交于
The lock is acquired with spin_lock_irqsave() and released in the not-found case with spin_unlock_irqrestore(). Signed-off-by: NNicolas Pitre <nico@marvell.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 20 10月, 2007 1 次提交
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由 Alexey Dobriyan 提交于
One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: NAlexey Dobriyan <adobriyan@openvz.org> Signed-off-by: NPavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 26 7月, 2007 1 次提交
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由 Russell King 提交于
IGNORE_FIQ does not appear in the Kconfig files, so can be removed. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 18 7月, 2007 1 次提交
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由 Pavel Emelianov 提交于
If the kernel OOPSed or BUGed then it probably should be considered as tainted. Thus, all subsequent OOPSes and SysRq dumps will report the tainted kernel. This saves a lot of time explaining oddities in the calltraces. Signed-off-by: NPavel Emelianov <xemul@openvz.org> Acked-by: NRandy Dunlap <randy.dunlap@oracle.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> [ Added parisc patch from Matthew Wilson -Linus ] Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 06 7月, 2007 1 次提交
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由 Russell King 提交于
Don't make this dependent on CONFIG_DEBUG_KERNEL - if we hit a WARN_ON we need the stack trace to work out how we got to that point. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 17 6月, 2007 1 次提交
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由 Russell King 提交于
Add calls to oops_enter() and oops_exit() to __die(), so that things like lockdep know when an oops occurs. Add suffixes to the oops report to indicate whether the running kernel has been built with preempt or smp support. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 09 5月, 2007 1 次提交
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由 Christoph Hellwig 提交于
This patch moves the die notifier handling to common code. Previous various architectures had exactly the same code for it. Note that the new code is compiled unconditionally, this should be understood as an appel to the other architecture maintainer to implement support for it aswell (aka sprinkling a notify_die or two in the proper place) arm had a notifiy_die that did something totally different, I renamed it to arm_notify_die as part of the patch and made it static to the file it's declared and used at. avr32 used to pass slightly less information through this interface and I brought it into line with the other architectures. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix vmalloc_sync_all bustage] [bryan.wu@analog.com: fix vmalloc_sync_all in nommu] Signed-off-by: NChristoph Hellwig <hch@lst.de> Cc: <linux-arch@vger.kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: NBryan Wu <bryan.wu@analog.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 03 5月, 2007 1 次提交
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由 Dan Williams 提交于
Now that do_undefinstr handles kernel and user mode undefined instruction exceptions it must not assume that interrupts are enabled at entry. Signed-off-by: NDan Williams <dan.j.williams@intel.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 22 4月, 2007 2 次提交
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由 Russell King 提交于
Lots of places in arch/arm were needlessly including linux/ptrace.h, resumably because we used to pass a struct pt_regs to interrupt handlers. Now that we don't, all these ptrace.h includes are redundant. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 14 2月, 2007 1 次提交
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由 Dan Williams 提交于
do_undefinstr currently does not expect undefined instructions in kernel code, since it always uses get_user() to read the instruction. Dereference the 'pc' pointer directly in the SVC case. Per Nicolas Pitre's note, kernel code is never in thumb mode. Signed-off-by: NDan Williams <dan.j.williams@intel.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 07 2月, 2007 1 次提交
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由 Russell King 提交于
bad_mode() currently prints the mode which caused the exception, and then causes an oops dump to be printed which again displays this information (since the CPSR in the struct pt_regs is correct.) This leads to processor_modes[] being shared between traps.c and process.c with a local declaration of it. We can clean this up by moving processor_modes[] to process.c and removing the duplication, resulting in processor_modes[] becoming static. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 06 1月, 2007 1 次提交
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由 Ben Dooks 提交于
Include <asm/io.h> to fix the warning: arch/arm/kernel/traps.c:647:6: warning: symbol '__readwrite_bug' was not declared. Should it be static? Include <linux/mc146818rtc.h> to fix the warning: arch/arm/kernel/time.c:42:1: warning: symbol 'rtc_lock' was not declared. Should it be static? Signed-off-by: NBen Dooks <ben-linux@fluff.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 08 12月, 2006 1 次提交
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由 Nicolas Pitre 提交于
It appears that include/asm-arm/bug.h requires include/linux/stddef.h for the definition of NULL. It seems that stddef.h was always included indirectly in most cases, and that issue was properly fixed a while ago. Then commit 5047f09b incorrectly reverted change from commit ff10952a (bad dwmw2) and the problem recently resurfaced. Because the third argument to __bug() is never used anyway, RMK suggested getting rid of it entirely instead of readding #include <linux/stddef.h> which this patch does. Signed-off-by: NNicolas Pitre <nico@cam.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 20 9月, 2006 1 次提交
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由 Daniel Jacobowitz 提交于
Patch from Daniel Jacobowitz The ARM kernel has several uses of asm("foo%?"). %? is a GCC internal modifier used to output conditional execution predicates. However, no version of GCC supports conditionalizing asm statements. GCC 4.2 will correctly expand %? to the empty string in user asms. Earlier versions may reuse the condition from the previous instruction. In 'if (foo) asm ("bar%?");' this is somewhat likely to be right... but not reliable. So, the only safe thing to do is to remove the uses of %?. I believe the tlbflush.h occurances were supposed to be removed before, based on the comment about %? not working at the top of that file. Old versions of GCC could omit branches around user asms if the asm didn't mark the condition codes as clobbered. This problem hasn't been seen on any recent (3.x or 4.x) GCC, but it could theoretically happen. So, where %? was removed a cc clobber was added. Signed-off-by: NDaniel Jacobowitz <dan@codesourcery.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 15 8月, 2006 1 次提交
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由 Horms 提交于
Previously the message was "Fatal exception: panic_on_oops", as introduced in a recent patch whith removed a somewhat dangerous call to ssleep() in the panic_on_oops path. However, Paul Mackerras suggested that this was somewhat confusing, leadind people to believe that it was panic_on_oops that was the root cause of the fatal exception. On his suggestion, this patch changes the message to simply "Fatal exception". A suitable oops message should already have been displayed. Signed-off-by: NSimon Horman <horms@verge.net.au> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 01 8月, 2006 1 次提交
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由 Horms 提交于
This patch is part of an effort to unify the panic_on_oops behaviour across all architectures that implement it. It was pointed out to me by Andi Kleen that if an oops has occured in interrupt context, then calling sleep() in the oops path will only cause a panic, and that it would be really better for it not to be in the path at all. This patch removes the ssleep() call and reworks the console message accordinly. I have a slght concern that the resulting console message is too long, feedback welcome. For powerpc it also unifies the 32bit and 64bit behaviour. Fror x86_64, this patch only updates the console message, as ssleep() is already not present. Signed-off-by: NHorms <horms@verge.net.au> Acked-by: NPaul Mackerras <paulus@samba.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 01 7月, 2006 1 次提交
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由 Jörn Engel 提交于
Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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- 27 3月, 2006 1 次提交
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由 Hyok S. Choi 提交于
The high page vector (0xFFFF0000) does not supported in nommu mode. This patch allows the vectors to be 0x00000000 or the begining of DRAM in nommu mode. Signed-off-by: NHyok S. Choi <hyok.choi@samsung.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 26 3月, 2006 1 次提交
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由 Nicolas Pitre 提交于
Patch from Nicolas Pitre Quoting RMK: |pte_write() just says that the page _may_ be writable. It doesn't say |that the MMU is programmed to allow writes. If pte_dirty() doesn't |return true, that means that the page is _not_ writable from userspace. |If you write to it from kernel mode (without using put_user) you'll |bypass the MMU read-only protection and may end up writing to a page |owned by two separate processes. Signed-off-by: NNicolas Pitre <nico@cam.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 22 2月, 2006 1 次提交
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由 Russell King 提交于
Although you could ask the kernel for panic-on-oops, it remained non-functional because the architecture specific code fragment had not been implemented. Add it, so it works as advertised. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 15 1月, 2006 1 次提交
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由 Nicolas Pitre 提交于
Patch from Nicolas Pitre For a while we wanted to change the way syscalls were called on ARM. Instead of encoding the syscall number in the swi instruction which requires reading back the instruction from memory to extract that number and polluting the data cache, it was decided that simply storing the syscall number into r7 would be more efficient. Since this represents an ABI change then making that change at the same time as EABI support is the right thing to do. It is now expected that EABI user space binaries put the syscall number into r7 and use "swi 0" to call the kernel. Syscall register argument are also expected to have "EABI arrangement" i.e. 64-bit arguments should be put in a pair of registers from an even register number. Example with long ftruncate64(unsigned int fd, loff_t length): legacy ABI: - put fd into r0 - put length into r1-r2 - use "swi #(0x900000 + 194)" to call the kernel new ARM EABI: - put fd into r0 - put length into r2-r3 (skipping over r1) - put 194 into r7 - use "swi 0" to call the kernel Note that it is important to use 0 for the swi argument as backward compatibility with legacy ABI user space relies on this. The syscall macros in asm-arm/unistd.h were also updated to support both ABIs and implement the right call method automatically. Signed-off-by: NNicolas Pitre <nico@cam.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 13 1月, 2006 2 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 04 1月, 2006 1 次提交
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由 Russell King 提交于
arch/arm/kernel/entry-armv.S has contained a comment suggesting that asm/hardware.h and asm/arch/irqs.h should be moved into the asm/arch/entry-macro.S include. So move the includes to these two files as required. Add missing includes (asm/hardware.h, asm/io.h) to asm/arch/system.h includes which use those facilities, and remove asm/io.h from kernel/process.c. Remove other unnecessary includes from arch/arm/kernel, arch/arm/mm and arch/arm/mach-footbridge. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 31 10月, 2005 1 次提交
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由 Russell King 提交于
Provide __die() which can be called from various contexts to provide an oops report. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 30 10月, 2005 1 次提交
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由 Hugh Dickins 提交于
Prepare arm for the split page_table_lock: three issues. Signal handling's preserve and restore of iwmmxt context currently involves reading and writing that context to and from user space, while holding page_table_lock to secure the user page(s) against kswapd. If we split the lock, then the structure might span two pages, secured by to read into and write from a kernel stack buffer, copying that out and in without locking (the structure is 160 bytes in size, and here we're near the top of the kernel stack). Or would the overhead be noticeable? arm_syscall's cmpxchg emulation use pte_offset_map_lock, instead of pte_offset_map and mm-wide page_table_lock; and strictly, it should now also take mmap_sem before descending to pmd, to guard against another thread munmapping, and the page table pulled out beneath this thread. Updated two comments in fault-armv.c. adjust_pte is interesting, since its modification of a pte in one part of the mm depends on the lock held when calling update_mmu_cache for a pte in some other part of that mm. This can't be done with a split page_table_lock (and we've already taken the lowest lock in the hierarchy here): so we'll have to disable split on arm, unless CONFIG_CPU_CACHE_VIPT to ensures adjust_pte never used. Signed-off-by: NHugh Dickins <hugh@veritas.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 28 10月, 2005 1 次提交
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由 Nicolas Pitre 提交于
Patch from Nicolas Pitre From: Daniel Jacobowitz <dan@debian.org> > I also fixed a bug that confused me greatly while trying to debug: one > SIGILL has long been a SIGSEGV because of some broken RISCOS > compatibility code. Signed-off-by: NNicolas Pitre <nico@cam.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 05 10月, 2005 1 次提交
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由 Nicolas Pitre 提交于
Patch from Nicolas Pitre The cmpxchg emulation syscall needs write access. Signed-off-by: NNicolas Pitre <nico@cam.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 22 9月, 2005 1 次提交
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由 Catalin Marinas 提交于
Patch from Catalin Marinas This patch prevents the "noreturn function does return" warning in the __bug() function in arch/arm/kernel/traps.c Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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