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* Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds2010-03-031-2/+2
|\ | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: resource: Fix broken indentation resource: Fix generic page_is_ram() for partial RAM pages x86, paravirt: Remove kmap_atomic_pte paravirt op. x86, vmi: Disable highmem PTE allocation even when CONFIG_HIGHPTE=y x86, xen: Disable highmem PTE allocation even when CONFIG_HIGHPTE=y
| * x86, paravirt: Remove kmap_atomic_pte paravirt op.Ian Campbell2010-02-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that both Xen and VMI disable allocations of PTE pages from high memory this paravirt op serves no further purpose. This effectively reverts ce6234b5 "add kmap_atomic_pte for mapping highpte pages". Signed-off-by: Ian Campbell <ian.campbell@citrix.com> LKML-Reference: <1267204562-11844-3-git-send-email-ian.campbell@citrix.com> Acked-by: Alok Kataria <akataria@vmware.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itselfRussell King2010-02-201-1/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <sfr@canb.auug.org.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* x86: Add NMI types for kmap_atomic, fixPeter Zijlstra2009-06-151-1/+4
| | | | | | | | | | | | | | | | | | | | | I just realized this has a kmap_atomic bug in... The below would fix it - but it's complicating this code some more. Alternatively I would have to introduce something like pte_offset_map_irq() which would make the irq/nmi detection and leave the regular code paths alone, however that would mean either duplicating the gup_fast() pagewalk or passing down a pte function pointer, which would only duplicate the gup_pte_range() bit, neither is really attractive ... Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> CC: Nick Piggin <npiggin@suse.de> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: Add NMI types for kmap_atomicPeter Zijlstra2009-06-151-2/+3
| | | | | | | | | | | | Two new kmap_atomic slots for NMI context. And teach pte_offset_map() about NMI context. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> CC: Nick Piggin <npiggin@suse.de> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86-32: use brk segment for allocating initial kernel pagetableJeremy Fitzhardinge2009-03-141-3/+0
| | | | | | | | | | | | | | | Impact: use new interface instead of previous ad hoc implementation Rather than having special purpose init_pg_table_start/end variables to delimit the kernel pagetable built by head_32.S, just use the brk mechanism to extend the bss for the new pagetable. This patch removes init_pg_table_start/end and pg0, defines __brk_base (which is page-aligned and immediately follows _end), initializes the brk region to start there, and uses it for the 32-bit pagetable. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Split pgtable_32.h into pgtable_32.h and pgtable_32_types.hJeremy Fitzhardinge2009-02-111-41/+1
| | | | Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
* x86: rename *-defs.h to *-_types.h for consistencyJeremy Fitzhardinge2009-02-111-2/+2
| | | | | | | The kernel tends to call definition-only headers *_types.h, so rename the x86 page/pgtable headers accordingly. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify io_remap_pfn_rangeJeremy Fitzhardinge2009-02-061-3/+0
| | | | | | | | Impact: cleanup Unify io_remap_pfn_range. Don't demacro yet. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pages_to_mbJeremy Fitzhardinge2009-02-061-2/+0
| | | | | | | | Impact: cleanup Unify and demacro pages_to_mb. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pmd_badJeremy Fitzhardinge2009-02-061-2/+0
| | | | | | | | Impact: cleanup Unify and demacro pmd_bad. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pud_largeJeremy Fitzhardinge2009-02-061-2/+0
| | | | | | | | Impact: cleanup Unify and demacro pud_large. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pte_offset_kernelJeremy Fitzhardinge2009-02-061-3/+0
| | | | | | | | Impact: cleanup Unify and demacro pte_offset_kernel. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pte_indexJeremy Fitzhardinge2009-02-061-8/+0
| | | | | | | | Impact: cleanup Unify and demacro pte_index. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pmd_pfnJeremy Fitzhardinge2009-02-061-7/+0
| | | | | | | | | Impact: cleanup Unify pmd_pfn. Unfortunately it can't be demacroed because it has a cyclic dependency on linux/mm.h:page_to_nid(). Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pmd_indexJeremy Fitzhardinge2009-02-061-9/+0
| | | | | | | | Impact: cleanup Unify and demacro pmd_index. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pmd_pageJeremy Fitzhardinge2009-02-061-2/+0
| | | | | | | | Impact: cleanup Unify and demacro pmd_page. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pmd_page_vaddrJeremy Fitzhardinge2009-02-061-3/+0
| | | | | | | | Impact: cleanup Unify and demacro pmd_page_vaddr. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pmd_noneJeremy Fitzhardinge2009-02-061-2/+0
| | | | | | | | Impact: cleanup Unify and demacro pmd_none. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pmd_presentJeremy Fitzhardinge2009-02-061-1/+0
| | | | | | | | Impact: cleanup Unify and demacro pmd_present. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: unify pte_presentJeremy Fitzhardinge2009-02-061-2/+0
| | | | | | | | Impact: cleanup Unify and demacro pte_present. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86: PAT: change pgprot_noncached to uc_minus instead of strong uc - v3venkatesh.pallipadi@intel.com2008-12-181-9/+0
| | | | | | | | | | | | Impact: mm behavior change. Make pgprot_noncached uc_minus instead of strong UC. This will make pgprot_noncached to be in line with ioremap_nocache() and all the other APIs that map page uc_minus on uc request. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Fix ASM_X86__ header guardsH. Peter Anvin2008-10-221-3/+3
| | | | | | | | | Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86, um: ... and asm-x86 moveAl Viro2008-10-221-0/+191
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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