diff options
| author | Jeff Dike <jdike@addtoit.com> | 2008-02-05 07:30:55 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 18:44:28 +0100 |
| commit | 655e4ed0c521dcfdbf1c5a79da971560e6733527 (patch) | |
| tree | 8b0cf794410c9e632b9ee65b8e0750621d9c96ce /arch/um/kernel | |
| parent | uml: current.h cleanup (diff) | |
| download | linux-655e4ed0c521dcfdbf1c5a79da971560e6733527.tar.xz linux-655e4ed0c521dcfdbf1c5a79da971560e6733527.zip | |
uml: fix page table data sizes
Get the sizes of various pieces of data right when using three-level
page tables. pgd and pmd entries remain at 32 bits in a 32-bit
compilation because page tables will remain in low memory. So,
PGDIR_SHIFT, the PTRS_PER_* values, set_pud, set_pmd are conditional
on 64BIT.
More use of phys_t is made when there are physical memory addresses
floating around.
ObCheckpatchViolationJustification - the new typedef is an alternate
definition of pmd_t, which I can't really live without.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/kernel')
| -rw-r--r-- | arch/um/kernel/mem.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index 3eddc2091d4d..663011c2983f 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -132,7 +132,7 @@ static void __init fixrange_init(unsigned long start, unsigned long end, if (pud_none(*pud)) one_md_table_init(pud); pmd = pmd_offset(pud, vaddr); - for (; (j < PTRS_PER_PMD) && (vaddr != end); pmd++, j++) { + for (; (j < PTRS_PER_PMD) && (vaddr < end); pmd++, j++) { one_page_table_init(pmd); vaddr += PMD_SIZE; } @@ -191,22 +191,23 @@ static void __init fixaddr_user_init( void) pud_t *pud; pmd_t *pmd; pte_t *pte; - unsigned long paddr, vaddr = FIXADDR_USER_START; + phys_t p; + unsigned long v, vaddr = FIXADDR_USER_START; - if ( ! size ) + if (!size) return; fixrange_init( FIXADDR_USER_START, FIXADDR_USER_END, swapper_pg_dir); - paddr = (unsigned long)alloc_bootmem_low_pages( size); - memcpy( (void *)paddr, (void *)FIXADDR_USER_START, size); - paddr = __pa(paddr); + v = (unsigned long) alloc_bootmem_low_pages(size); + memcpy((void *) v , (void *) FIXADDR_USER_START, size); + p = __pa(v); for ( ; size > 0; size -= PAGE_SIZE, vaddr += PAGE_SIZE, - paddr += PAGE_SIZE) { + p += PAGE_SIZE) { pgd = swapper_pg_dir + pgd_index(vaddr); pud = pud_offset(pgd, vaddr); pmd = pmd_offset(pud, vaddr); pte = pte_offset_kernel(pmd, vaddr); - pte_set_val( (*pte), paddr, PAGE_READONLY); + pte_set_val(*pte, p, PAGE_READONLY); } #endif } |