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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-03 09:11:02 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-03 09:11:02 -0800 |
| commit | 2a32f2db132264c356aea30a8270d3e68d96c509 (patch) | |
| tree | f98f0e1b9d85c7964b8fc149f451ae77072c3c27 /kernel/resource.c | |
| parent | feaf77d51a6e2e95f60c8095ac7282e610ede798 (diff) | |
| parent | f41496607e03ab99f263b8e26689ad0fc853007f (diff) | |
| download | lwn-2a32f2db132264c356aea30a8270d3e68d96c509.tar.gz lwn-2a32f2db132264c356aea30a8270d3e68d96c509.zip | |
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.c | 9 |
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; |