This reverts commit 5a982cbc7b3fe6cf72266f319286f29963c71b9e. The intention behind this patch was to make the free_bootmem() interface more robust with regards to the specified range and to let it operate on multiple node setups as well. However, it made free_bootmem_core() 1. handle bogus node/memory-range combination input by just returning early without informing the callsite or screaming BUG() as it did before 2. round slightly out of node-range values to the node boundaries instead of treating them as the invalid parameters they are This was partially done to abuse free_bootmem_core() for node iteration in free_bootmem (just feeding it every node on the box and let it figure out what it wants to do with it) instead of looking up the proper node before the call to free_bootmem_core(). It also affects free_bootmem_node() which relies on free_bootmem_core() and on its sanity checks now removed. Signed-off-by: Johannes Weiner CC: Yinghai Lu CC: Andi Kleen CC: Yasunori Goto CC: KAMEZAWA Hiroyuki CC: Ingo Molnar CC: Christoph Lameter CC: Andrew Morton --- mm/bootmem.c | 25 ++++++------------------- 1 files changed, 6 insertions(+), 19 deletions(-) diff --git a/mm/bootmem.c b/mm/bootmem.c index 2ccea70..f6ff433 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -125,7 +125,6 @@ static int __init reserve_bootmem_core(bootmem_data_t *bdata, BUG_ON(!size); BUG_ON(PFN_DOWN(addr) >= bdata->node_low_pfn); BUG_ON(PFN_UP(addr + size) > bdata->node_low_pfn); - BUG_ON(addr < bdata->node_boot_start); sidx = PFN_DOWN(addr - bdata->node_boot_start); eidx = PFN_UP(addr + size - bdata->node_boot_start); @@ -157,31 +156,21 @@ static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, unsigned long sidx, eidx; unsigned long i; - BUG_ON(!size); - - /* out range */ - if (addr + size < bdata->node_boot_start || - PFN_DOWN(addr) > bdata->node_low_pfn) - return; /* * round down end of usable mem, partially free pages are * considered reserved. */ + BUG_ON(!size); + BUG_ON(PFN_DOWN(addr + size) > bdata->node_low_pfn); - if (addr >= bdata->node_boot_start && addr < bdata->last_success) + if (addr < bdata->last_success) bdata->last_success = addr; /* - * Round up to index to the range. + * Round up the beginning of the address. */ - if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start)) - sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start); - else - sidx = 0; - + sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start); eidx = PFN_DOWN(addr + size - bdata->node_boot_start); - if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) - eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); for (i = sidx; i < eidx; i++) { if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map))) @@ -432,9 +421,7 @@ int __init reserve_bootmem(unsigned long addr, unsigned long size, void __init free_bootmem(unsigned long addr, unsigned long size) { - bootmem_data_t *bdata; - list_for_each_entry(bdata, &bdata_list, list) - free_bootmem_core(bdata, addr, size); + free_bootmem_core(NODE_DATA(0)->bdata, addr, size); } unsigned long __init free_all_bootmem(void) -- 1.5.2.2 -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/