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authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-03 09:11:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-03 09:11:02 -0800
commit2a32f2db132264c356aea30a8270d3e68d96c509 (patch)
treef98f0e1b9d85c7964b8fc149f451ae77072c3c27 /kernel/resource.c
parentfeaf77d51a6e2e95f60c8095ac7282e610ede798 (diff)
parentf41496607e03ab99f263b8e26689ad0fc853007f (diff)
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: resource: Fix broken indentation resource: Fix generic page_is_ram() for partial RAM pages x86, paravirt: Remove kmap_atomic_pte paravirt op. x86, vmi: Disable highmem PTE allocation even when CONFIG_HIGHPTE=y x86, xen: Disable highmem PTE allocation even when CONFIG_HIGHPTE=y
Diffstat (limited to 'kernel/resource.c')
-rw-r--r--kernel/resource.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index 4e9d87fd7bc5..2d5be5d9bf5f 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -304,7 +304,7 @@ int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
void *arg, int (*func)(unsigned long, unsigned long, void *))
{
struct resource res;
- unsigned long pfn, len;
+ unsigned long pfn, end_pfn;
u64 orig_end;
int ret = -1;
@@ -314,9 +314,10 @@ int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
orig_end = res.end;
while ((res.start < res.end) &&
(find_next_system_ram(&res, "System RAM") >= 0)) {
- pfn = (unsigned long)(res.start >> PAGE_SHIFT);
- len = (unsigned long)((res.end + 1 - res.start) >> PAGE_SHIFT);
- ret = (*func)(pfn, len, arg);
+ pfn = (res.start + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ end_pfn = (res.end + 1) >> PAGE_SHIFT;
+ if (end_pfn > pfn)
+ ret = (*func)(pfn, end_pfn - pfn, arg);
if (ret)
break;
res.start = res.end + 1;