diff options
Diffstat (limited to 'arch/x86_64/kernel')
| -rw-r--r-- | arch/x86_64/kernel/e820.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c index 116ac5f53dc..bb0ae18ec02 100644 --- a/arch/x86_64/kernel/e820.c +++ b/arch/x86_64/kernel/e820.c @@ -567,7 +567,7 @@ unsigned long pci_mem_start = 0xaeedbabe; */ __init void e820_setup_gap(void) { - unsigned long gapstart, gapsize; + unsigned long gapstart, gapsize, round; unsigned long last; int i; int found = 0; @@ -604,14 +604,14 @@ __init void e820_setup_gap(void) } /* - * Start allocating dynamic PCI memory a bit into the gap, - * aligned up to the nearest megabyte. - * - * Question: should we try to pad it up a bit (do something - * like " + (gapsize >> 3)" in there too?). We now have the - * technology. + * See how much we want to round up: start off with + * rounding to the next 1MB area. */ - pci_mem_start = (gapstart + 0xfffff) & ~0xfffff; + round = 0x100000; + while ((gapsize >> 4) > round) + round += round; + /* Fun with two's complement */ + pci_mem_start = (gapstart + round) & -round; printk(KERN_INFO "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n", pci_mem_start, gapstart, gapsize); |