linux/arch/um/include, branch v2.6.35.8

um, hweight: Fix UML boot crash due to x86 optimized hweight

2010-06-10T22:24:30Z

Apparently UML cannot stomach callee reg-saving trickery introduced with d61931d89be506372d01a90d1755f6d0a9fafe2d (x86: Add optimized popcnt variants) and oopses during boot: http://marc.info/?l=linux-kernel&m=127522065202435&w=2 Redirect arch_hweight.h include from the x86 portion to the generic arch_hweight.h which is a fallback to the software hweight routines. LKML-Reference: <201005271944.09541.toralf.foerster@gmx.de> Signed-off-by: Borislav Petkov LKML-Reference: <4C0F4B00.4090307@panasas.com> Signed-off-by: H. Peter Anvin

add descriptive comment for TIF_MEMDIE task flag declaration.

2010-05-14T09:13:27Z

Signed-off-by: Andreas Dilger Acked-by: KOSAKI Motohiro Signed-off-by: Jiri Kosina

UML: Clean up asm/system.h

2010-04-20T14:32:47Z

Remove duplicates and unused prototypes. Signed-off-by: Jan Kiszka Acked-by: WANG Cong Signed-off-by: Jiri Kosina

um: remove dma_sync_single_range

2010-03-12T23:52:40Z

dma_sync_single_for_cpu/for_device supports a partial sync so there is no point to have dma_sync_single_range (also dma_sync_single was obsoleted long ago, replaced with dma_sync_single_for_cpu/for_device). There is no user of dma_sync_single_range() in mainline and only Alpha architecture supports dma_sync_single_range(). So it's unlikely that someone out of the tree uses it. Signed-off-by: FUJITA Tomonori Cc: Jeff Dike Acked-by: David S. Miller Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

um: use generic ptrace_resume code

2010-03-12T23:52:39Z

Use the generic ptrace_resume code for PTRACE_SYSCALL, PTRACE_CONT, PTRACE_KILL and PTRACE_SINGLESTEP. This implies defining arch_has_single_step in and implementing the user_enable_single_step and user_disable_single_step functions, which also causes the breakpoint information to be cleared on fork, which could be considered a bug fix. Also the TIF_SYSCALL_TRACE thread flag is now cleared on PTRACE_KILL which it previously wasn't which is consistent with all architectures using the modern ptrace code. XXX: I'm not sure arch_has_single_step() is placed in the exactly correct location, please verify in which of the ptrace headers it should really be. Signed-off-by: Christoph Hellwig Cc: Oleg Nesterov Cc: Roland McGrath Cc: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself

2010-02-20T16:41:46Z

On VIVT ARM, when we have multiple shared mappings of the same file in the same MM, we need to ensure that we have coherency across all copies. We do this via make_coherent() by making the pages uncacheable. This used to work fine, until we allowed highmem with highpte - we now have a page table which is mapped as required, and is not available for modification via update_mmu_cache(). Ralf Beache suggested getting rid of the PTE value passed to update_mmu_cache(): On MIPS update_mmu_cache() calls __update_tlb() which walks pagetables to construct a pointer to the pte again. Passing a pte_t * is much more elegant. Maybe we might even replace the pte argument with the pte_t? Ben Herrenschmidt would also like the pte pointer for PowerPC: Passing the ptep in there is exactly what I want. I want that -instead- of the PTE value, because I have issue on some ppc cases, for I$/D$ coherency, where set_pte_at() may decide to mask out the _PAGE_EXEC. So, pass in the mapped page table pointer into update_mmu_cache(), and remove the PTE value, updating all implementations and call sites to suit. Includes a fix from Stephen Rothwell: sparc: fix fallout from update_mmu_cache API change Signed-off-by: Stephen Rothwell Acked-by: Benjamin Herrenschmidt Signed-off-by: Russell King

kbuild: move asm-offsets.h to include/generated

2009-12-12T12:08:14Z

The simplest method was to add an extra asm-offsets.h file in arch/$ARCH/include/asm that references the generated file. We can now migrate the architectures one-by-one to reference the generated file direct - and when done we can delete the temporary arch/$ARCH/include/asm/asm-offsets.h file. Signed-off-by: Sam Ravnborg Cc: Al Viro Signed-off-by: Michal Marek

um: Clean up linker script using standard macros.

2009-09-25T00:16:22Z

Signed-off-by: Tim Abbott Cc: Jeff Dike Cc: user-mode-linux-devel@lists.sourceforge.net Acked-by: Sam Ravnborg Signed-off-by: Linus Torvalds

cpumask: use mm_cpumask() wrapper: um

2009-09-24T00:04:51Z

Makes code futureproof against the impending change to mm->cpu_vm_mask. It's also a chance to use the new cpumask_ ops which take a pointer (the older ones are deprecated, but there's no hurry for arch code). Signed-off-by: Rusty Russell

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2009-09-22T14:51:45Z

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits) trivial: fix typo in aic7xxx comment trivial: fix comment typo in drivers/ata/pata_hpt37x.c trivial: typo in kernel-parameters.txt trivial: fix typo in tracing documentation trivial: add __init/__exit macros in drivers/gpio/bt8xxgpio.c trivial: add __init macro/ fix of __exit macro location in ipmi_poweroff.c trivial: remove unnecessary semicolons trivial: Fix duplicated word "options" in comment trivial: kbuild: remove extraneous blank line after declaration of usage() trivial: improve help text for mm debug config options trivial: doc: hpfall: accept disk device to unload as argument trivial: doc: hpfall: reduce risk that hpfall can do harm trivial: SubmittingPatches: Fix reference to renumbered step trivial: fix typos "man[ae]g?ment" -> "management" trivial: media/video/cx88: add __init/__exit macros to cx88 drivers trivial: fix typo in CONFIG_DEBUG_FS in gcov doc trivial: fix missing printk space in amd_k7_smp_check trivial: fix typo s/ketymap/keymap/ in comment trivial: fix typo "to to" in multiple files trivial: fix typos in comments s/DGBU/DBGU/ ...