http://blog.gmane.org/gmane.linux.kernel.cross-arch hourly 1 1901-01-01T00:00+00:00 http://gmane.org/img/gmane-25t.png http://gmane.org http://comments.gmane.org/gmane.linux.kernel.cross-arch/14289 <pre> Ok, so I'm going to merge the appended commit into mainline at some point here soon, and I thought maybe the BE people wanted to pipe up. This does *not* use the generic "find zero" or "count bytes" logic that David used for strncpy_from_user(), because quite frankly, that one is suboptimal on x86 and causes conditionals and crap. So it's not truly generic, but it's in lib/strnlen_user.c and under the CONFIG_GENERIC_STRNLEN_USER config option, because I'm convinced it should be possible to do something that does the right thing for everybody. Eventually. But "the right thing" definitely involves arch-specific helpers for doing the byte counting, because it *is* going to occasionally be a popcount instruction or similar. And it *is* going to take advantage of the fact that things are sometimes simply easier on little-endian. So this isn't truly generic, but without a BE machine I simply cannot care enough about the BE case. So I'm posting this as a heads-up before I actually merge it, to see..</pre> Linus Torvalds 2012-05-25T22:35:38 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14269 <pre>get_signal_to_deliver() calls try_to_freeze() which might sleep. Cc: Russell King &lt;linux&lt; at &gt;arm.linux.org.uk&gt; Cc: linux-arm-kernel&lt; at &gt;lists.infradead.org Signed-off-by: Richard Weinberger &lt;richard&lt; at &gt;nod.at&gt; --- arch/arm/kernel/signal.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index 4e5fdd9..434a1f3 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c &lt; at &gt;&lt; at &gt; -13,6 +13,7 &lt; at &gt;&lt; at &gt; #include &lt;linux/freezer.h&gt; #include &lt;linux/uaccess.h&gt; #include &lt;linux/tracehook.h&gt; +#include &lt;linux/irqflags.h&gt; #include &lt;asm/elf.h&gt; #include &lt;asm/cacheflush.h&gt; &lt; at &gt;&lt; at &gt; -722,6 +723,8 &lt; at &gt;&lt; at &gt; static void do_signal(struct pt_regs *regs, int syscall) asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned int thread_flags, int syscall) { +local_irq_enable(); + if (thread_flags &amp; _TIF_SIGPENDING) do_signal(regs, syscall); </pre> Richard Weinberger 2012-05-25T22:04:17 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14255 <pre> As per commits 2922585b93294d47172a765115e0dbc1bfe1be19 ("lib: Sparc's strncpy_from_user is generic enough, move under lib/"), 92ae03f2ef99fbc23bfa9080d6b58f25227bd7ef ("x86: merge 32/64-bit versions of 'strncpy_from_user()' and speed it up"), and corresponding discussion on linux-arch. Signed-off-by: Jonas Bonn &lt;jonas&lt; at &gt;southpole.se&gt; --- Hi Linus, Here's a single patch update to the OpenRISC arch to use the new strncpy_from_user implementation. Hope it's ok to send it as a single patch and not as a pull request; let me know otherwise. Thanks, Jonas arch/openrisc/Kconfig | 1 + arch/openrisc/include/asm/uaccess.h | 10 ++----- arch/openrisc/lib/string.S | 52 ----------------------------------- 3 files changed, 4 insertions(+), 59 deletions(-) diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index da4ccd1..ee4d124 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig &lt; at &gt;&lt; at &gt; -19,6 +19,7 &lt; at &gt;&lt; at &gt; config OPENRISC select GENERIC_CPU_DEVICES select GENERIC_ATOMIC6</pre> Jonas Bonn 2012-05-25T06:24:49 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14252 <pre> And make sure that everything using it explicitly includes that header file. Signed-off-by: David S. Miller &lt;davem&lt; at &gt;davemloft.net&gt; --- arch/sparc/lib/usercopy.c | 3 +-- arch/x86/include/asm/word-at-a-time.h | 4 ++-- fs/namei.c | 1 + include/linux/kernel.h | 2 ++ 4 files changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/sparc/lib/usercopy.c b/arch/sparc/lib/usercopy.c index f61ed82..0b12e91 100644 --- a/arch/sparc/lib/usercopy.c +++ b/arch/sparc/lib/usercopy.c &lt; at &gt;&lt; at &gt; -1,5 +1,6 &lt; at &gt;&lt; at &gt; #include &lt;linux/module.h&gt; #include &lt;linux/uaccess.h&gt; +#include &lt;linux/kernel.h&gt; #include &lt;linux/errno.h&gt; #include &lt;linux/bug.h&gt; &lt; at &gt;&lt; at &gt; -11,8 +12,6 &lt; at &gt;&lt; at &gt; void copy_from_user_overflow(void) } EXPORT_SYMBOL(copy_from_user_overflow); -#define REPEAT_BYTE(x)((~0ul / 0xff) * (x)) - static inline long find_zero(unsigned long mask) { long byte = 0; diff --git a/arch/x86/include/asm/word-at-a-time.h b/arch/x86/include/asm/word-at-a-time.h index e58f03b..ae03</pre> David Miller 2012-05-24T20:26:19 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14236 <pre> To use this, an architecture simply needs to: 1) Provide a user_addr_max() implementation via asm/uaccess.h 2) Add "select GENERIC_STRNCPY_FROM_USER" to their arch Kcnfig 3) Remove the existing strncpy_from_user() implementation and symbol exports their architecture had. Signed-off-by: David S. Miller &lt;davem&lt; at &gt;davemloft.net&gt; --- arch/sparc/Kconfig | 1 + arch/sparc/lib/usercopy.c | 138 -------------------------------------------- lib/Kconfig | 3 + lib/Makefile | 2 + lib/strncpy_from_user.c | 140 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 146 insertions(+), 138 deletions(-) create mode 100644 lib/strncpy_from_user.c diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 051af37..2247423 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig &lt; at &gt;&lt; at &gt; -32,6 +32,7 &lt; at &gt;&lt; at &gt; config SPARC select HAVE_NMI_WATCHDOG if SPARC64 select HAVE_BPF_JIT select GENERIC_SMP_IDLE_THREAD +select GENERIC_STRNCPY_FROM_USER config SPARC32 def_bool</pre> David Miller 2012-05-24T03:34:40 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14235 <pre> Hide details of maximum user address calculation in a new asm/uaccess.h interface named user_addr_max(). Provide little-endian implementation in find_zero(), which should work but can probably be improved. Guard alignment check using CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS. Signed-off-by: David S. Miller &lt;davem&lt; at &gt;davemloft.net&gt; --- arch/sparc/include/asm/uaccess.h | 3 +++ arch/sparc/lib/usercopy.c | 28 ++++++++++++++++++++++------ 2 files changed, 25 insertions(+), 6 deletions(-) diff --git a/arch/sparc/include/asm/uaccess.h b/arch/sparc/include/asm/uaccess.h index 42a28cf..20c2acb 100644 --- a/arch/sparc/include/asm/uaccess.h +++ b/arch/sparc/include/asm/uaccess.h &lt; at &gt;&lt; at &gt; -6,6 +6,9 &lt; at &gt;&lt; at &gt; #include &lt;asm/uaccess_32.h&gt; #endif +#define user_addr_max() \ +(segment_eq(get_fs(), USER_DS) ? STACK_TOP : ~0UL) + extern long strncpy_from_user(char *dest, const char __user *src, long count); #endif diff --git a/arch/sparc/lib/usercopy.c b/arch/sparc/lib/usercopy.c index 87f9645..9ba59ef 100644 --- a/ar</pre> David Miller 2012-05-24T03:34:30 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14234 <pre> And make sure that everything using it explicitly includes that header file. Signed-off-by: David S. Miller &lt;davem&lt; at &gt;davemloft.net&gt; --- arch/sparc/lib/usercopy.c | 3 +-- arch/x86/include/asm/word-at-a-time.h | 4 ++-- fs/namei.c | 1 + include/linux/kernel.h | 2 ++ 4 files changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/sparc/lib/usercopy.c b/arch/sparc/lib/usercopy.c index 9ba59ef..3d3bef9 100644 --- a/arch/sparc/lib/usercopy.c +++ b/arch/sparc/lib/usercopy.c &lt; at &gt;&lt; at &gt; -1,5 +1,6 &lt; at &gt;&lt; at &gt; #include &lt;linux/module.h&gt; #include &lt;linux/uaccess.h&gt; +#include &lt;linux/kernel.h&gt; #include &lt;linux/errno.h&gt; #include &lt;linux/bug.h&gt; &lt; at &gt;&lt; at &gt; -11,8 +12,6 &lt; at &gt;&lt; at &gt; void copy_from_user_overflow(void) } EXPORT_SYMBOL(copy_from_user_overflow); -#define REPEAT_BYTE(x)((~0ul / 0xff) * (x)) - static inline long find_zero(unsigned long mask) { long byte = 0; diff --git a/arch/x86/include/asm/word-at-a-time.h b/arch/x86/include/asm/word-at-a-time.h index e58f03b..ae03</pre> David Miller 2012-05-24T03:34:35 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14233 <pre> Ok, this is against my current sparc GIT tree at: git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc.git After these changes it should definitely be usable by any architecture. If there are no major objections I can push this out to my sparc tree and ask Linus to pull all of this work in. Afterwards we can tweak it to use the x86 word-at-a-time tricks if we want. Thanks. </pre> David Miller 2012-05-24T03:34:18 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14215 <pre>This is just the first part of the queue (about a half of it); assorted fixes all over the place in signals' handling. This one ends with all sigsuspend() implementations switched to generic one (-&gt;saved_sigmask-based), a bunch of assorted old buglets fixed and most of the missing bits of NOTIFY_RESUME hookup in place (two more sit in arm and um trees resp. and there's a couple of broken ones that need obvious fixes - parisc and avr32 check TIF_NOTIFY_RESUME only on one of two codepaths; that'll go in the next series). Please, pull from git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal.git for-linus Shortlog: Al Viro (35): new helper: sigsuspend() parisc: resetting -&gt;restart_block.fn needs to be done on rt_sigreturn() c6x: -&gt;restart_block.fn needs to be reset on rt_sigreturn hexagon: -&gt;restart_block.fn needs to be reset on rt_sigreturn microblaze: -&gt;restart_block.fn needs to be reset on rt_sigreturn score: -&gt;restart_block.fn needs to be reset on rt_sigreturn </pre> Al Viro 2012-05-22T04:35:25 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14212 <pre>Ok, several weeks ago I sent out an email about the x86 strncpy_from_user() patch I did, and cc'd linux-arch because the second stage might well affect other architectures. Nobody reacted to it, and today that second stage was merged into mainline, so I thought I'd re-do the notice. The relevant part of the original explanation is appended, but I'll explain once more.. On x86, we *used* to be very lazy about strncpy_from_user(), and not actually do the full proper error handling: the code was (for historical reasons) using inline asms where it was very inconvenient to actually check the proper end of the address space. And nobody had really ever bothered to fix it up. As a result, the main user (getname()) had its own special magic workarounds for this. Until 3.4. We now do strncpy_from_user() properly, with all the appropriate error cases of hitting the end of the user address space etc handled. And now that the 3.5 merge window is open, some of the first merging I did was my own branches that had been </pre> Linus Torvalds 2012-05-21T16:50:34 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14211 <pre>您还在为家庭不够富裕，而不能让品学兼优的孩子出国深造而苦恼吗？ 您还在为国内教育资源分配严重不均，而不能让自己的孩子获得理想的教育环境而发愁吗？ 免交40万留学保证金，打造平民化的出国留学服务！ 让工薪家庭孩子也可以一圆出国留学梦！ 爱尔兰名校等您来深造！ 想了解详情的请联系QQ: 2636882155 或者立即回复邮箱: 2636882155&lt; at &gt;qq.com 想了解详情的请联系QQ: 2636882155 或者立即回复邮箱: 2636882155&lt; at &gt;qq.com 想了解详情的请联系QQ: 2636882155 或者立即回复邮箱: 2636882155&lt; at &gt;qq.com 现诚招全国各地出国留学顾问。 零风险！高回报！共享朝阳般的教育产业大蛋糕！ 请联系QQ: 2636882155 请联系QQ: 2636882155 请联系QQ: 2636882155 </pre> 平民化的出国留学服务 2012-05-21T13:09:13 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14198 <pre>1) spot the braino: void do_trap0(struct pt_regs *regs) ... unsigned long syscallret = 0; ... if ((unsigned long) regs-&gt;syscall_nr &gt;= __NR_syscalls) { regs-&gt;r00 = -1; } else { syscall = (syscall_fn) (sys_call_table[regs-&gt;syscall_nr]); syscallret = syscall(regs-&gt;r00, regs-&gt;r01, regs-&gt;r02, regs-&gt;r03, regs-&gt;r04, regs-&gt;r05); } if (regs-&gt;syscall_nr != __NR_rt_sigreturn) regs-&gt;r00 = syscallret; IOW, the last if () should've been inside the "syscall_nr is not too high" branch of the if () just above... 2) you do _not_ want syscall restarts to happen on sigreturn(). Whatever adjustment needed to be done had already been done back before we'd saved the registers into sigcontext. So doing regs-&gt;syscall_nr = __NR_rt_sigreturn; in sys_rt_s</pre> Al Viro 2012-05-19T21:09:11 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14098 <pre>Hello, This is another update on dma-mapping redesign patches for ARM. I integrated a few minor fixes that were needed to solve the issues reported after putting these patches for testing in linux-next branch. The patches are also available on my git repository at: git://git.linaro.org/people/mszyprowski/linux-dma-mapping.git 3.4-rc7-arm-dma-v10 History of the development: v1: (initial version of the DMA-mapping redesign patches): http://www.spinics.net/lists/linux-mm/msg21241.html v2: http://lists.linaro.org/pipermail/linaro-mm-sig/2011-September/000571.html http://lists.linaro.org/pipermail/linaro-mm-sig/2011-September/000577.html v3: http://www.spinics.net/lists/linux-mm/msg25490.html v4 and v5: http://www.spinics.net/lists/arm-kernel/msg151147.html http://www.spinics.net/lists/arm-kernel/msg154889.html v6: http://www.spinics.net/lists/linux-mm/msg29903.html v7: http://www.spinics.net/lists/arm-kernel/msg162149.html v8: http://www.spinics.net/lists/arm-kernel/msg168478.html v9: http://www.spini</pre> Marek Szyprowski 2012-05-17T13:13:50 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14050 <pre>Ease the deployment of clkdev by providing a default asm/clkdev.h which will be used if the arch does not have an include/asm/clkdev.h. Signed-off-by: Mark Brown &lt;broonie&lt; at &gt;opensource.wolfsonmicro.com&gt; --- include/asm-generic/Kbuild.asm | 4 ++++ include/asm-generic/clkdev.h | 26 ++++++++++++++++++++++++++ 2 files changed, 30 insertions(+) create mode 100644 include/asm-generic/clkdev.h diff --git a/include/asm-generic/Kbuild.asm b/include/asm-generic/Kbuild.asm index c5d2e5d..da121e0 100644 --- a/include/asm-generic/Kbuild.asm +++ b/include/asm-generic/Kbuild.asm &lt; at &gt;&lt; at &gt; -13,6 +13,10 &lt; at &gt;&lt; at &gt; ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/a.out.h \ header-y += a.out.h endif +ifeq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/clkdev.h),) +generic-y += clkdev.h +endif + header-y += auxvec.h header-y += bitsperlong.h header-y += byteorder.h diff --git a/include/asm-generic/clkdev.h b/include/asm-generic/clkdev.h new file mode 100644 index 0000000..c362a9d --- /dev/null +++ b/include/asm-ge</pre> Mark Brown 2012-05-14T14:19:27 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14043 <pre>Do we have any archs that does runtime patching of function calls? On sparc32 we have infrastructure to do so but this requires an additional step after the final link that I like to get rid of. Basically what is required is to locate all call-sites that for example call: cache_flush_all(); and replace this with a srmmu_cache_flush_all(); sparc32 has ~30 calls that is eligble for runtime patching. sparc-next has seen some nice cleanup in this area, so your regular kernel has much more. We know early on the what to patch with as the only paramters involved are platform and MMU type. I could try to come up with something myself - but if we already have it somewhere maybe there is something to be inspired by. Sam </pre> Sam Ravnborg 2012-05-13T12:16:00 http://comments.gmane.org/gmane.linux.kernel.cross-arch/14033 <pre>haalloo, how are you doing,i hope you are fine,my name is miss abi okom i got your contact and want us to be a good friend, please try and write back to me so that i will give you my pictures and tell you more about me, </pre> abi 2012-05-12T17:04:35 http://comments.gmane.org/gmane.linux.kernel.cross-arch/13996 <pre>kvm needs to update some hypervisor variables atomically in a sense that the operation can't be interrupted in the middle. However the hypervisor always runs on the same CPU so it does not need any memory barrier or lock prefix. Add _local bitops for this purpose: define them as non-atomics for x86 and (for now) atomics for everyone else. Uses are not restricted to virtualization: they might be useful to communicate with an interrupt handler if we know that it's running on the same CPU. Signed-off-by: Michael S. Tsirkin &lt;mst&lt; at &gt;redhat.com&gt; Acked-by: Arnd Bergmann &lt;arnd&lt; at &gt;arndb.de&gt; --- Changes from v1: - Fix x86 version so it includes optimization barriers as suggested by Peter Anvin - Fix documentation as suggested by Avi Kivity - Remove duplicate files as suggested by Arnd Bergmann Link to discussion preceding v1: http://www.spinics.net/lists/kvm/msg72241.html Documentation/atomic_ops.txt | 19 ++++ arch/x86/include/asm/bitops.h | 132 +++++++++++++++++++++++++++++ include/</pre> Michael S. Tsirkin 2012-05-09T16:28:19 http://comments.gmane.org/gmane.linux.kernel.cross-arch/13971 <pre>From: Vladimir Murzin &lt;murzin.v&lt; at &gt;gmail&gt; The current get_unmapped_area code calls the f_ops-&gt;get_unmapped_area or the arch's one (via the mm) only when check for TASK_SIZE is passed. However, generic code and some arches do the same check in their a_g_u_a implementation. This series of patches fix the check order for TASK_SIZE in archs' get_unmapped_area() implementations, and then removes extra check in high-level get_unmapped_area(). Vladimir Murzin (6): get_unmapped_area checks for TASK_SIZE before MAP_FIXED on arm get_unmapped_area checks for TASK_SIZE before MAP_FIXED on sh get_unmapped_area checks for TASK_SIZE before MAP_FIXED on sparc32 get_unmapped_area checks for TASK_SIZE before MAP_FIXED on sparc64 get_unmapped_area checks for TASK_SIZE before MAP_FIXED on x86_64 get_unmapped_area remove extra check for TASK_SIZE arch/arm/mm/mmap.c | 6 +++--- arch/sh/mm/mmap.c | 12 ++++++------ arch/sparc/kernel/sys_sparc_32.c | 9 +++++---- arch/sparc/kernel/</pre> Vladimir Murzin 2012-05-08T14:40:16 http://comments.gmane.org/gmane.linux.kernel.cross-arch/13963 <pre> Here's a couple of patches that I'm planning on queuing up for 3.5. These have been through the openrisc mailing list, but there's not much response on that channel, so I thought I'd run these once by the "big" list. Comments welcome, otherwise these will go into 3.5. Thanks, Jonas Jonas Bonn (5): openrisc: implement irqdomains openrisc: remove unnecessary includes openrisc: header file cleanups openrisc: provide dma_map_ops openrisc: use scratch regs in atomic syscall Kautuk Consul (1): openrisc/mm/fault.c: Port OOM changes to do_page_fault arch/openrisc/Kconfig | 1 + arch/openrisc/include/asm/Kbuild | 3 +- arch/openrisc/include/asm/dma-mapping.h | 147 +++++++------------------------ arch/openrisc/include/asm/elf.h | 12 ++- arch/openrisc/include/asm/ptrace.h | 6 +- arch/openrisc/kernel/dma.c | 109 +++++++++++++++-------- arch/openrisc/kernel/entry.S | 8 +- arch/openrisc/kernel/irq.c | 83 +</pre> Jonas Bonn 2012-05-08T09:53:59 http://comments.gmane.org/gmane.linux.kernel.cross-arch/13937 <pre> Check out my Multiply site I set up a Multiply site with my pictures, videos and blog and I want to add you as my friend so you can see it. First, you need to join Multiply! Once you join, you can also create your own site and share anything you want, with anyone you want. Here's the link: http://multiply.com/si/PlknC3ZfVkZFzocsLwdi+A Gracias de leer y me responde Thanks, Gracias de leer Stop e-mails, view our privacy policy, or report abuse: http://multiply.com/bl/PlknC3ZfVkZFzocsLwdi+A We haven't added your email address to any lists, nor will we share it with anyone at any time. Copyright 2012 Multiply 6001 Park of Commerce Blvd, Boca Raton, FL </pre> Gracias de leer y me responde (via Multiply) 2012-05-05T20:45:38 http://comments.gmane.org/gmane.linux.kernel.cross-arch/13936 <pre> Check out my Multiply site I set up a Multiply site with my pictures, videos and blog and I want to add you as my friend so you can see it. First, you need to join Multiply! Once you join, you can also create your own site and share anything you want, with anyone you want. Here's the link: http://multiply.com/si/hTCRezMd03moqDWw+PQ06A Gracias de leer y me responde Thanks, Gracias de leer Stop e-mails, view our privacy policy, or report abuse: http://multiply.com/bl/hTCRezMd03moqDWw+PQ06A We haven't added your email address to any lists, nor will we share it with anyone at any time. Copyright 2012 Multiply 6001 Park of Commerce Blvd, Boca Raton, FL </pre> Gracias de leer y me responde (via Multiply) 2012-05-05T20:46:01 Search the mailing list at Gmane query http://search.gmane.org/?group=$group=gmane.linux.kernel.cross-arch