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[AVR32] Fix bogus pte_page() definition 

The current definition of pte_page() masks out valid bits from the
physical address, causing vmalloc_to_page() to misbehave. This may
lead to everything from mmap() silently accessing the wrong data to
"invalid pte" errors dumped by the kernel.

Also remove the now-unused definition of PTE_PHYS_MASK.

Thanks to Matteo Vit for discovering this bug.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Haavard Skinnemoen 2007-08-15 16:12:18 +02:00
parent e7f3bac95e
commit 6f834197a7
1 changed files with 1 additions and 3 deletions
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4
include/asm-avr32/pgtable.h
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@ -32,8 +32,6 @@
#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE) #define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
#define FIRST_USER_ADDRESS 0 #define FIRST_USER_ADDRESS 0
#define PTE_PHYS_MASK 0x1ffff000
#ifndef __ASSEMBLY__ #ifndef __ASSEMBLY__
extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
extern void paging_init(void); extern void paging_init(void);
@ -265,7 +263,7 @@ static inline pte_t pte_mkyoung(pte_t pte)
* trivial. * trivial.
*/ */
#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
#define pte_page(x) phys_to_page(pte_val(x) & PTE_PHYS_MASK) #define pte_page(x) (pfn_to_page(pte_pfn(x)))
/* /*
* Mark the prot value as uncacheable and unbufferable * Mark the prot value as uncacheable and unbufferable