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authorWei Yang <richardw.yang@linux.intel.com>2019-03-05 11:34:32 +0300
committerIngo Molnar <mingo@kernel.org>2019-04-19 13:59:36 +0300
commitf6c6010a07734103a31faa0cc977641b358c45b0 (patch)
tree083827fdeff31a4f9da7a8e281492ae8cd592a39 /kernel/resource.c
parent6455959819bf2469190ae9f6b4ccebaa9827e884 (diff)
downloadlinux-f6c6010a07734103a31faa0cc977641b358c45b0.tar.xz
mm/resource: Use resource_overlaps() to simplify region_intersects()
The three checks in region_intersects() are basically an open-coded version of resource_overlaps() - so use the real thing. Also fix typos in comments while at it. Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Reviewed-by: Like Xu <like.xu@linux.intel.com> Reviewed-by: Yuan Yao <yuan.yao@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: akpm@linux-foundation.org Cc: bhelgaas@google.com Cc: bp@suse.de Cc: dan.j.williams@intel.com Cc: jack@suse.cz Cc: rdunlap@infradead.org Cc: tiwai@suse.de Link: http://lkml.kernel.org/r/20190305083432.23675-1-richardw.yang@linux.intel.com [ Rewrote the changelog. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/resource.c')
-rw-r--r--kernel/resource.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index 92190f62ebc5..8c15f846e8ef 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -520,21 +520,20 @@ EXPORT_SYMBOL_GPL(page_is_ram);
int region_intersects(resource_size_t start, size_t size, unsigned long flags,
unsigned long desc)
{
- resource_size_t end = start + size - 1;
+ struct resource res;
int type = 0; int other = 0;
struct resource *p;
+ res.start = start;
+ res.end = start + size - 1;
+
read_lock(&resource_lock);
for (p = iomem_resource.child; p ; p = p->sibling) {
bool is_type = (((p->flags & flags) == flags) &&
((desc == IORES_DESC_NONE) ||
(desc == p->desc)));
- if (start >= p->start && start <= p->end)
- is_type ? type++ : other++;
- if (end >= p->start && end <= p->end)
- is_type ? type++ : other++;
- if (p->start >= start && p->end <= end)
+ if (resource_overlaps(p, &res))
is_type ? type++ : other++;
}
read_unlock(&resource_lock);