linux/kernel/kexec.c, branch v2.6.37

use clear_page()/copy_page() in favor of memset()/memcpy() on whole pages

2010-10-26T23:52:13Z

After all that's what they are intended for. Signed-off-by: Jan Beulich Cc: Miklos Szeredi Cc: "Eric W. Biederman" Cc: "Rafael J. Wysocki" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kexec: return -EFAULT on copy_to_user() failures

2010-08-11T15:59:22Z

copy_to/from_user() returns the number of bytes remaining to be copied. It never returns a negative value. The correct return code is -EFAULT and not -EIO. All the callers check for non-zero returns so that's Ok, but the return code is passed to the user so we should fix this. Signed-off-by: Dan Carpenter Cc: Hidetoshi Seto Cc: "Paul E. McKenney" Cc: "Eric W. Biederman" Cc: Simon Kagstrom Acked-by: WANG Cong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kexec: fix Oops in crash_shrink_memory()

2010-06-29T22:29:31Z

When crashkernel is not enabled, "echo 0 > /sys/kernel/kexec_crash_size" OOPSes the kernel in crash_shrink_memory. This happens when crash_shrink_memory tries to release the 'crashk_res' resource which are not reserved. Also value of "/sys/kernel/kexec_crash_size" shows as 1, which should be 0. This patch fixes the OOPS in crash_shrink_memory and shows "/sys/kernel/kexec_crash_size" as 0 when crash kernel memory is not reserved. Signed-off-by: Pavan Naregundi Reviewed-by: WANG Cong Cc: Simon Horman Cc: Vivek Goyal Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kexec: fix OOPS in crash_kernel_shrink

2010-05-12T00:33:42Z

Two "echo 0 > /sys/kernel/kexec_crash_size" OOPSes kernel. Also content of this file is invalid after first shrink to zero: it shows 1 instead of 0. This scenario is unlikely to happen often (root privs, valid crashkernel= in cmdline, dump-capture kernel not loaded), I hit it only by chance. This patch fixes it. Signed-off-by: Vitaly Mayatskikh Cc: Cong Wang Cc: Neil Horman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

percpu: add __percpu sparse annotations to core kernel subsystems

2010-02-17T02:17:38Z

Add __percpu sparse annotations to core subsystems. These annotations are to make sparse consider percpu variables to be in a different address space and warn if accessed without going through percpu accessors. This patch doesn't affect normal builds. Signed-off-by: Tejun Heo Reviewed-by: Christoph Lameter Acked-by: Paul E. McKenney Cc: Jens Axboe Cc: linux-mm@kvack.org Cc: Rusty Russell Cc: Dipankar Sarma Cc: Peter Zijlstra Cc: Andrew Morton Cc: Eric Biederman

Merge git://git.infradead.org/~dwmw2/mtd-2.6.33

2010-01-24T18:31:34Z

* git://git.infradead.org/~dwmw2/mtd-2.6.33: mtd: tests: fix read, speed and stress tests on NOR flash mtd: Really add ARM pismo support kmsg_dump: Dump on crash_kexec as well

kmsg_dump: Dump on crash_kexec as well

2009-12-31T19:45:04Z

crash_kexec gets called before kmsg_dump(KMSG_DUMP_OOPS) if panic_on_oops is set, so the kernel log buffer is not stored for this case. This patch adds a KMSG_DUMP_KEXEC dump type which gets called when crash_kexec() is invoked. To avoid getting double dumps, the old KMSG_DUMP_PANIC is moved below crash_kexec(). The mtdoops driver is modified to handle KMSG_DUMP_KEXEC in the same way as a panic. Signed-off-by: KOSAKI Motohiro Acked-by: Simon Kagstrom Signed-off-by: David Woodhouse

Merge branch 'for-33' of git://repo.or.cz/linux-kbuild

2009-12-17T15:23:42Z

* 'for-33' of git://repo.or.cz/linux-kbuild: (29 commits) net: fix for utsrelease.h moving to generated gen_init_cpio: fixed fwrite warning kbuild: fix make clean after mismerge kbuild: generate modules.builtin genksyms: properly consider EXPORT_UNUSED_SYMBOL{,_GPL}() score: add asm/asm-offsets.h wrapper unifdef: update to upstream revision 1.190 kbuild: specify absolute paths for cscope kbuild: create include/generated in silentoldconfig scripts/package: deb-pkg: use fakeroot if available scripts/package: add KBUILD_PKG_ROOTCMD variable scripts/package: tar-pkg: use tar --owner=root Kbuild: clean up marker net: add net_tstamp.h to headers_install kbuild: move utsrelease.h to include/generated kbuild: move autoconf.h to include/generated drop explicit include of autoconf.h kbuild: move compile.h to include/generated kbuild: drop include/asm kbuild: do not check for include/asm-$ARCH ... Fixed non-conflicting clean merge of modpost.c as per comments from Stephen Rothwell (modpost.c had grown an include of linux/autoconf.h that needed to be changed to generated/autoconf.h)

kexec: premit reduction of the reserved memory size

2009-12-16T15:20:13Z

Implement shrinking the reserved memory for crash kernel, if it is more than enough. For example, if you have already reserved 128M, now you just want 100M, you can do: # echo $((100*1024*1024)) > /sys/kernel/kexec_crash_size Note, you can only do this before loading the crash kernel. Signed-off-by: WANG Cong Cc: Neil Horman Acked-by: Eric W. Biederman Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kbuild: move utsrelease.h to include/generated

2009-12-12T12:08:15Z

Fix up all users of utsrelease.h Signed-off-by: Sam Ravnborg Signed-off-by: Michal Marek