diff options
| author | Wei Yang <richardw.yang@linux.intel.com> | 2019-03-05 16:34:32 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-04-19 12:59:36 +0200 |
| commit | f6c6010a07734103a31faa0cc977641b358c45b0 (patch) | |
| tree | 083827fdeff31a4f9da7a8e281492ae8cd592a39 /kernel/resource.c | |
| parent | 6455959819bf2469190ae9f6b4ccebaa9827e884 (diff) | |
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.c | 11 |
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); |