From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: [patch 1/2] make page table index functions take void* From: Dave Hansen Date: Wed, 25 Aug 2004 12:06:08 -0700 Message-Id: Sender: owner-linux-mm@kvack.org Return-Path: To: ak@muc.de Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dave Hansen List-ID: Andi, since this is your code, I thought I'd send these to you to look over first. Do you have any good test cases for this code? I don't think I have any hardware that uses the NX bit. Instead of casting the void*'s into "unsigned long"s to pass into the pagetable functions: p{gd,md,te}_index(), do a cast inside the macro. All of the current callers should be "unsigned long"s already, so this should have no other effect than making it valid to pass a void* to those functions. Signed-off-by: Dave Hansen --- memhotplug-dave/include/asm-i386/pgtable.h | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-) diff -puN include/asm-i386/pgtable.h~AA0-index-functions-take-voidstar include/asm-i386/pgtable.h --- memhotplug/include/asm-i386/pgtable.h~AA0-index-functions-take-voidstar 2004-08-25 11:53:57.000000000 -0700 +++ memhotplug-dave/include/asm-i386/pgtable.h 2004-08-25 11:58:08.000000000 -0700 @@ -309,7 +309,8 @@ static inline pte_t pte_modify(pte_t pte * this macro returns the index of the entry in the pgd page which would * control the given virtual address */ -#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) +#define pgd_index(address) \ + (((unsigned long)(address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) /* * pgd_offset() returns a (pgd_t *) @@ -330,7 +331,7 @@ static inline pte_t pte_modify(pte_t pte * control the given virtual address */ #define pmd_index(address) \ - (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) + (((unsigned long)(address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) /* * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] @@ -339,7 +340,7 @@ static inline pte_t pte_modify(pte_t pte * control the given virtual address */ #define pte_index(address) \ - (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) + (((unsigned long)(address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) #define pte_offset_kernel(dir, address) \ ((pte_t *) pmd_page_kernel(*(dir)) + pte_index(address)) _ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org