diff options
Diffstat (limited to 'mm/bootmem.c')
| -rw-r--r-- | mm/bootmem.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c index e790acc4f..edc69e6b3 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -36,9 +36,7 @@ unsigned long __init init_bootmem (unsigned long start, unsigned long pages) { unsigned long mapsize = (pages+7)/8; - if (bootmem_map) - BUG(); - bootmem_map = __va(start << PAGE_SHIFT); + bootmem_map = phys_to_virt(start << PAGE_SHIFT); max_low_pfn = pages; /* @@ -64,7 +62,6 @@ void __init reserve_bootmem (unsigned long addr, unsigned long size) */ unsigned long end = (addr + size + PAGE_SIZE-1)/PAGE_SIZE; - if (!bootmem_map) BUG(); if (!size) BUG(); if (end > max_low_pfn) @@ -77,18 +74,23 @@ void __init reserve_bootmem (unsigned long addr, unsigned long size) void __init free_bootmem (unsigned long addr, unsigned long size) { unsigned long i; + unsigned long start; /* * round down end of usable mem, partially free pages are * considered reserved. */ unsigned long end = (addr + size)/PAGE_SIZE; - if (!bootmem_map) BUG(); if (!size) BUG(); - if (end > max_low_pfn) BUG(); - for (i = addr/PAGE_SIZE; i < end; i++) { + + /* + * Round up the beginning of the address. + */ + start = (addr + PAGE_SIZE-1) / PAGE_SIZE; + + for (i = start; i < end; i++) { if (!test_and_clear_bit(i, bootmem_map)) BUG(); } @@ -117,7 +119,6 @@ void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned unsigned long offset, remaining_size; unsigned long areasize, preferred; - if (!bootmem_map) BUG(); if (!size) BUG(); /* @@ -152,6 +153,9 @@ restart_scan: preferred = 0; goto restart_scan; } + /* + * Whoops, we cannot satisfy the allocation request. + */ BUG(); found: if (start >= max_low_pfn) @@ -173,11 +177,11 @@ found: areasize = 0; // last_pos unchanged last_offset = offset+size; - ret = __va(last_pos*PAGE_SIZE + offset); + ret = phys_to_virt(last_pos*PAGE_SIZE + offset); } else { size -= remaining_size; areasize = (size+PAGE_SIZE-1)/PAGE_SIZE; - ret = __va(last_pos*PAGE_SIZE + offset); + ret = phys_to_virt(last_pos*PAGE_SIZE + offset); last_pos = start+areasize-1; last_offset = size; } @@ -185,7 +189,7 @@ found: } else { last_pos = start + areasize - 1; last_offset = size & ~PAGE_MASK; - ret = __va(start * PAGE_SIZE); + ret = phys_to_virt(start * PAGE_SIZE); } /* * Reserve the area now: @@ -211,12 +215,13 @@ unsigned long __init free_all_bootmem (void) count++; ClearPageReserved(page); set_page_count(page, 1); - if (i >= (__pa(MAX_DMA_ADDRESS) >> PAGE_SHIFT)) + if (i >= (virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT)) clear_bit(PG_DMA, &page->flags); __free_page(page); } } total += count; + /* * Now free the allocator bitmap itself, it's not * needed anymore: |