diff options
Diffstat (limited to 'mm/bootmem.c')
| -rw-r--r-- | mm/bootmem.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c index 00a96970b23..f6ff4337b42 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -111,11 +111,12 @@ static unsigned long __init init_bootmem_core(pg_data_t *pgdat, * might be used for boot-time allocations - or it might get added * to the free page pool later on. */ -static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long addr, - unsigned long size) +static int __init reserve_bootmem_core(bootmem_data_t *bdata, + unsigned long addr, unsigned long size, int flags) { unsigned long sidx, eidx; unsigned long i; + int ret; /* * round up, partially reserved pages are considered @@ -133,7 +134,20 @@ static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long add #ifdef CONFIG_DEBUG_BOOTMEM printk("hm, page %08lx reserved twice.\n", i*PAGE_SIZE); #endif + if (flags & BOOTMEM_EXCLUSIVE) { + ret = -EBUSY; + goto err; + } } + + return 0; + +err: + /* unreserve memory we accidentally reserved */ + for (i--; i >= sidx; i--) + clear_bit(i, bdata->node_bootmem_map); + + return ret; } static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, @@ -374,9 +388,9 @@ unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn, } void __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, - unsigned long size) + unsigned long size, int flags) { - reserve_bootmem_core(pgdat->bdata, physaddr, size); + reserve_bootmem_core(pgdat->bdata, physaddr, size, flags); } void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, @@ -398,9 +412,10 @@ unsigned long __init init_bootmem(unsigned long start, unsigned long pages) } #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE -void __init reserve_bootmem(unsigned long addr, unsigned long size) +int __init reserve_bootmem(unsigned long addr, unsigned long size, + int flags) { - reserve_bootmem_core(NODE_DATA(0)->bdata, addr, size); + return reserve_bootmem_core(NODE_DATA(0)->bdata, addr, size, flags); } #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ |