6.6-stable review patch. If anyone has any objections, please let me know.
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From: Andy Shevchenko andriy.shevchenko@linux.intel.com
[ Upstream commit ba1eccc114ffc62c4495a5e15659190fa2c42308 ]
There are already a couple of places where we may replace a few lines of code by calling a helper, which increases readability while deduplicating the code.
Introduce is_type_match() helper and use it.
Link: https://lkml.kernel.org/r/20240925154355.1170859-3-andriy.shevchenko@linux.i... Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Cc: Rasmus Villemoes linux@rasmusvillemoes.dk Signed-off-by: Andrew Morton akpm@linux-foundation.org Stable-dep-of: 6fb3acdebf65 ("Reinstate "resource: avoid unnecessary lookups in find_next_iomem_res()"") Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/resource.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-)
diff --git a/kernel/resource.c b/kernel/resource.c index dcc3b564c0537..67410132b40e1 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -310,6 +310,11 @@ int release_resource(struct resource *old)
EXPORT_SYMBOL(release_resource);
+static bool is_type_match(struct resource *p, unsigned long flags, unsigned long desc) +{ + return (p->flags & flags) == flags && (desc == IORES_DESC_NONE || desc == p->desc); +} + /** * find_next_iomem_res - Finds the lowest iomem resource that covers part of * [@start..@end]. @@ -352,13 +357,9 @@ static int find_next_iomem_res(resource_size_t start, resource_size_t end, if (p->end < start) continue;
- if ((p->flags & flags) != flags) - continue; - if ((desc != IORES_DESC_NONE) && (desc != p->desc)) - continue; - /* Found a match, break */ - break; + if (is_type_match(p, flags, desc)) + break; }
if (p) { @@ -501,7 +502,7 @@ static int __region_intersects(struct resource *parent, resource_size_t start, int type = 0; int other = 0; struct resource *p, *dp; struct resource res, o; - bool is_type, covered; + bool covered;
res.start = start; res.end = start + size - 1; @@ -509,9 +510,7 @@ static int __region_intersects(struct resource *parent, resource_size_t start, for (p = parent->child; p ; p = p->sibling) { if (!resource_intersection(p, &res, &o)) continue; - is_type = (p->flags & flags) == flags && - (desc == IORES_DESC_NONE || desc == p->desc); - if (is_type) { + if (is_type_match(p, flags, desc)) { type++; continue; } @@ -531,9 +530,7 @@ static int __region_intersects(struct resource *parent, resource_size_t start, for_each_resource(p, dp, false) { if (!resource_overlaps(dp, &res)) continue; - is_type = (dp->flags & flags) == flags && - (desc == IORES_DESC_NONE || desc == dp->desc); - if (is_type) { + if (is_type_match(dp, flags, desc)) { type++; /* * Range from 'o.start' to 'dp->start'