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authorJeff Dike <jdike@addtoit.com>2008-02-05 09:30:55 +0300
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 20:44:28 +0300
commit655e4ed0c521dcfdbf1c5a79da971560e6733527 (patch)
tree8b0cf794410c9e632b9ee65b8e0750621d9c96ce /arch/um
parenta5a678c80beac4d163babda243a27eeb9c89bd89 (diff)
downloadlinux-655e4ed0c521dcfdbf1c5a79da971560e6733527.tar.xz
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')
-rw-r--r--arch/um/kernel/mem.c17
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
}