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Subject[PATCH 1/2] 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 reserve stolen ram already.

[Impact: make more big space below 4g for assigning to unassigned pci devices]

Reported-by: Yannick <yannick.roehlly@free.fr>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Jesse Barnes <jesse.barnes@intel.com>

---
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_resources_late 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",

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