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Subject[PATCH 6/8] sparc: Use bitmap_find_next_zero_area
Date
Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
arch/sparc/kernel/ldc.c | 16 ++++------------
arch/sparc/mm/sun4c.c | 17 +++++------------
2 files changed, 9 insertions(+), 24 deletions(-)

diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c
index adf5f27..aa27d26 100644
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -14,6 +14,7 @@
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/init.h>
+#include <linux/bitmap.h>

#include <asm/hypervisor.h>
#include <asm/iommu.h>
@@ -1875,7 +1876,7 @@ EXPORT_SYMBOL(ldc_read);
static long arena_alloc(struct ldc_iommu *iommu, unsigned long npages)
{
struct iommu_arena *arena = &iommu->arena;
- unsigned long n, i, start, end, limit;
+ unsigned long n, start, end, limit;
int pass;

limit = arena->limit;
@@ -1883,7 +1884,7 @@ static long arena_alloc(struct ldc_iommu *iommu, unsigned long npages)
pass = 0;

again:
- n = find_next_zero_bit(arena->map, limit, start);
+ n = bitmap_find_next_zero_area(arena->map, limit, start, npages, 0);
end = n + npages;
if (unlikely(end >= limit)) {
if (likely(pass < 1)) {
@@ -1896,16 +1897,7 @@ again:
return -1;
}
}
-
- for (i = n; i < end; i++) {
- if (test_bit(i, arena->map)) {
- start = i + 1;
- goto again;
- }
- }
-
- for (i = n; i < end; i++)
- __set_bit(i, arena->map);
+ bitmap_set(arena->map, n, npages);

arena->hint = end;

diff --git a/arch/sparc/mm/sun4c.c b/arch/sparc/mm/sun4c.c
index 2ffacd6..a89baf0 100644
--- a/arch/sparc/mm/sun4c.c
+++ b/arch/sparc/mm/sun4c.c
@@ -17,6 +17,7 @@
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/scatterlist.h>
+#include <linux/bitmap.h>

#include <asm/sections.h>
#include <asm/page.h>
@@ -1021,20 +1022,12 @@ static char *sun4c_lockarea(char *vaddr, unsigned long size)
npages = (((unsigned long)vaddr & ~PAGE_MASK) +
size + (PAGE_SIZE-1)) >> PAGE_SHIFT;

- scan = 0;
local_irq_save(flags);
- for (;;) {
- scan = find_next_zero_bit(sun4c_iobuffer_map,
- iobuffer_map_size, scan);
- if ((base = scan) + npages > iobuffer_map_size) goto abend;
- for (;;) {
- if (scan >= base + npages) goto found;
- if (test_bit(scan, sun4c_iobuffer_map)) break;
- scan++;
- }
- }
+ base = bitmap_find_next_zero_area(sun4c_iobuffer_map, iobuffer_map_size,
+ 0, npages, 0);
+ if (base >= iobuffer_map_size)
+ goto abend;

-found:
high = ((base + npages) << PAGE_SHIFT) + sun4c_iobuffer_start;
high = SUN4C_REAL_PGDIR_ALIGN(high);
while (high > sun4c_iobuffer_high) {
--
1.5.4.3


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