From: Peter Zijlstra Date: Mon, 15 Jun 2009 14:46:05 +0000 (+0200) Subject: x86: Add NMI types for kmap_atomic, fix X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0990b1c65729012a63e0eeca93aaaafea4e9a064;p=linux-beck.git 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 CC: Nick Piggin Cc: Mike Galbraith Cc: Paul Mackerras Cc: Arnaldo Carvalho de Melo Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/include/asm/kmap_types.h b/arch/x86/include/asm/kmap_types.h index ff00a44b7d0d..f86613846198 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 85464971bca0..01fd9461d323 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)))