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-rw-r--r--arch/i386/kernel/setup.c16
-rw-r--r--arch/x86_64/kernel/e820.c16
2 files changed, 16 insertions, 16 deletions
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index fa0c69eb937..f3d808451d2 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -1300,7 +1300,7 @@ legacy_init_iomem_resources(struct resource *code_resource, struct resource *dat
*/
static void __init register_memory(void)
{
- unsigned long gapstart, gapsize;
+ unsigned long gapstart, gapsize, round;
unsigned long long last;
int i;
@@ -1345,14 +1345,14 @@ static void __init register_memory(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("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n",
pci_mem_start, gapstart, gapsize);
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);