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Message-Id: <20090501144254.52127677@kernel> Date: Fri, 01 May 2009 07:42:54 -0700 From: Dave Hansen <dave@...ux.vnet.ibm.com> To: linux-arch@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Dave Hansen <dave@...ux.vnet.ibm.com> Subject: [RFC][PATCH 34/35] powerpc use generic ptemap.h powerpc is a bid of an oddball here. It seems to have CONFIG_HIGHPTE behavior at all times when compiled as 32-bit. There's even an #ifdef CONFIG_HIGHPTE in arch/powerpc/mm/pgtable_32.c, but there's no trace of HIGHPTE in Kconfig anywhere. This gives ppc32 an explicit HIGHPTE in Kconfig so that we can use the #ifdef in asm-generic/ptemap.h and let ppc use the generic code with x86 and frv. Signed-off-by: Dave Hansen <dave@...ux.vnet.ibm.com> --- linux-2.6.git-dave/arch/powerpc/Kconfig | 4 ++++ linux-2.6.git-dave/arch/powerpc/include/asm/ptemap.h | 18 ++++++------------ 2 files changed, 10 insertions(+), 12 deletions(-) diff -puN arch/powerpc/include/asm/ptemap.h~powerpc-pte_offset_kernel arch/powerpc/include/asm/ptemap.h --- linux-2.6.git/arch/powerpc/include/asm/ptemap.h~powerpc-pte_offset_kernel 2009-04-30 15:11:13.000000000 -0700 +++ linux-2.6.git-dave/arch/powerpc/include/asm/ptemap.h 2009-04-30 15:11:13.000000000 -0700 @@ -2,19 +2,13 @@ #define _POWERPC_ASM_PTEMAP_H #ifndef __powerpc64__ - -#define pte_offset_map(dir, addr) \ - ((pte_t *) kmap_atomic(pmd_page(*(dir)), KM_PTE0) + pte_index(addr)) -#define pte_offset_map_nested(dir, addr) \ - ((pte_t *) kmap_atomic(pmd_page(*(dir)), KM_PTE1) + pte_index(addr)) - -#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0) -#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1) - -#else /* __powerpc64__ */ +/* + * This lets us use the x86 implementation + * in the generic ptemap.h + */ +#define kmap_atomic_pte(page, type) kmap_atomic(page, type) +#endif #include <asm-generic/ptemap.h> -#endif - #endif /* _POWERPC_ASM_PTEMAP_H */ diff -puN arch/powerpc/Kconfig~powerpc-pte_offset_kernel arch/powerpc/Kconfig --- linux-2.6.git/arch/powerpc/Kconfig~powerpc-pte_offset_kernel 2009-04-30 15:11:13.000000000 -0700 +++ linux-2.6.git-dave/arch/powerpc/Kconfig 2009-04-30 15:11:13.000000000 -0700 @@ -244,6 +244,10 @@ config HIGHMEM bool "High memory support" depends on PPC32 +config HIGHPTE + def_bool y + depends on HIGHMEM + source kernel/time/Kconfig source kernel/Kconfig.hz source kernel/Kconfig.preempt _ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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