[PATCH] x86/pci: make pci_mem_start to be aligned only -v5 don't need to reserved one round after the gapstart. because have round up in via e820_reserve_stolen_ram already. [Impact: make more big space below 4g for assigning to unassigned pci devices] Reported-by: Yannick Signed-off-by: Yinghai Lu --- arch/x86/kernel/e820.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) Index: linux-2.6/arch/x86/kernel/e820.c =================================================================== --- linux-2.6.orig/arch/x86/kernel/e820.c +++ linux-2.6/arch/x86/kernel/e820.c @@ -617,7 +617,7 @@ __init int e820_search_gap(unsigned long */ __init void e820_setup_gap(void) { - unsigned long gapstart, gapsize, round; + unsigned long gapstart, gapsize; int found; gapstart = 0x10000000; @@ -635,14 +635,9 @@ __init void e820_setup_gap(void) #endif /* - * See how much we want to round up: start off with - * rounding to the next 1MB area. + * e820_reserve_stolen_ram protect stolen RAM already */ - round = 0x100000; - while ((gapsize >> 4) > round) - round += round; - /* Fun with two's complement */ - pci_mem_start = (gapstart + round) & -round; + pci_mem_start = gapstart; printk(KERN_INFO "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",