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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-06-15 16:46:05 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-15 17:20:03 +0200 |
| commit | 0990b1c65729012a63e0eeca93aaaafea4e9a064 (patch) | |
| tree | 316801609bc0e7b0f8e2497d770ea9731c3ba620 | |
| parent | e2eae0f5605b90a0838608043c21050b08b6dd95 (diff) | |
| download | linux-3.10-0990b1c65729012a63e0eeca93aaaafea4e9a064.tar.gz linux-3.10-0990b1c65729012a63e0eeca93aaaafea4e9a064.tar.bz2 linux-3.10-0990b1c65729012a63e0eeca93aaaafea4e9a064.zip | |
x86: Add NMI types for kmap_atomic, fix
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>
| -rw-r--r-- | arch/x86/include/asm/kmap_types.h | 11 | ||||
| -rw-r--r-- | arch/x86/include/asm/pgtable_32.h | 5 |
2 files changed, 10 insertions, 6 deletions
diff --git a/arch/x86/include/asm/kmap_types.h b/arch/x86/include/asm/kmap_types.h index ff00a44b7d0..f8661384619 100644 --- a/arch/x86/include/asm/kmap_types.h +++ b/arch/x86/include/asm/kmap_types.h @@ -19,11 +19,12 @@ D(7) KM_PTE0, D(8) KM_PTE1, D(9) KM_IRQ0, D(10) KM_IRQ1, -D(11) KM_SOFTIRQ0, -D(12) KM_SOFTIRQ1, -D(13) KM_NMI, -D(14) KM_NMI_PTE, -D(15) KM_TYPE_NR +D(11) KM_IRQ_PTE, +D(12) KM_SOFTIRQ0, +D(13) KM_SOFTIRQ1, +D(14) KM_NMI, +D(15) KM_NMI_PTE, +D(16) KM_TYPE_NR }; #undef D diff --git a/arch/x86/include/asm/pgtable_32.h b/arch/x86/include/asm/pgtable_32.h index 85464971bca..01fd9461d32 100644 --- a/arch/x86/include/asm/pgtable_32.h +++ b/arch/x86/include/asm/pgtable_32.h @@ -49,7 +49,10 @@ extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t); #endif #if defined(CONFIG_HIGHPTE) -#define __KM_PTE (in_nmi() ? KM_NMI_PTE : KM_PTE0) +#define __KM_PTE \ + (in_nmi() ? KM_NMI_PTE : \ + in_irq() ? KM_IRQ_PTE : \ + KM_PTE0) #define pte_offset_map(dir, address) \ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)), __KM_PTE) + \ pte_index((address))) |