x86: clean up find_e820_area(), 64-bit

Change size to unsigned long, becase caller and user all used unsigned long.
Also make bad_addr take an alignment parameter.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 12 insertions, 10 deletions

diff --git a/arch/x86/kernel/e820_64.c b/arch/x86/kernel/e820_64.c
index 9be697126013..a8694a35352b 100644
--- a/arch/x86/kernel/e820_64.c
+++ b/arch/x86/kernel/e820_64.c
@@ -95,7 +95,8 @@ void __init early_res_to_bootmem(void)
 }
 
 /* Check for already reserved areas */
-static inline int bad_addr(unsigned long *addrp, unsigned long size)
+static inline int
+bad_addr(unsigned long *addrp, unsigned long size, unsigned long align)
 {
         int i;
         unsigned long addr = *addrp, last;
@@ -105,7 +106,7 @@ again:
         for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
                 struct early_res *r = &early_res[i];
                 if (last >= r->start && addr < r->end) {
-                        *addrp = addr = r->end;
+                        *addrp = addr = round_up(r->end, align);
                         changed = 1;
                         goto again;
                 }
@@ -174,26 +175,27 @@ int __init e820_all_mapped(unsigned long start, unsigned long end,
  * Find a free area with specified alignment in a specific range.
  */
 unsigned long __init find_e820_area(unsigned long start, unsigned long end,
-                                    unsigned size, unsigned long align)
+                                    unsigned long size, unsigned long align)
 {
         int i;
-        unsigned long mask = ~(align - 1);
 
         for (i = 0; i < e820.nr_map; i++) {
                 struct e820entry *ei = &e820.map[i];
-                unsigned long addr = ei->addr, last;
+                unsigned long addr, last;
+                unsigned long ei_last;
 
                 if (ei->type != E820_RAM)
                         continue;
+                addr = round_up(ei->addr, align);
+                ei_last = ei->addr + ei->size;
                 if (addr < start)
-                        addr = start;
-                if (addr > ei->addr + ei->size)
+                        addr = round_up(start, align);
+                if (addr > ei_last)
                         continue;
-                while (bad_addr(&addr, size) && addr+size <= ei->addr+ei->size)
+                while (bad_addr(&addr, size, align) && addr+size <= ei_last)
                         ;
-                addr = (addr + align - 1) & mask;
                 last = addr + size;
-                if (last > ei->addr + ei->size)
+                if (last > ei_last)
                         continue;
                 if (last > end)
                         continue;