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List:       linux-pci
Subject:    [PATCH 4/4] x86/pci: make pci_mem_start to be aligned only -v5
From:       Yinghai Lu <yinghai () kernel ! org>
Date:       2009-04-24 3:50:47
Message-ID: 49F13717.4010106 () kernel ! org
[Download RAW message or body]


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>

---
 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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