From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>,
linux-acpi@vger.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v3 1/6] resource: Simplify region_intersects() by reducing conditionals
Date: Fri, 30 Oct 2020 19:25:51 +0200 [thread overview]
Message-ID: <20201030172556.21686-2-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20201030172556.21686-1-andriy.shevchenko@linux.intel.com>
Now we have for 'other' and 'type' variables
other type return
0 0 REGION_DISJOINT
0 x REGION_INTERSECTS
x 0 REGION_DISJOINT
x x REGION_MIXED
Obviously it's easier to check 'type' for 0 first instead of
currently checked 'other'.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
kernel/resource.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/kernel/resource.c b/kernel/resource.c
index 3ae2f56cc79d..82df80417489 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -557,13 +557,13 @@ int region_intersects(resource_size_t start, size_t size, unsigned long flags,
}
read_unlock(&resource_lock);
- if (other == 0)
- return type ? REGION_INTERSECTS : REGION_DISJOINT;
+ if (type == 0)
+ return REGION_DISJOINT;
- if (type)
- return REGION_MIXED;
+ if (other == 0)
+ return REGION_INTERSECTS;
- return REGION_DISJOINT;
+ return REGION_MIXED;
}
EXPORT_SYMBOL_GPL(region_intersects);
--
2.28.0
next prev parent reply other threads:[~2020-10-30 17:26 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 17:25 [PATCH v3 0/6] resource: introduce union(), intersection() API Andy Shevchenko
2020-10-30 17:25 ` Andy Shevchenko [this message]
2020-10-30 17:25 ` [PATCH v3 2/6] resource: Group resource_overlaps() with other inline helpers Andy Shevchenko
2020-10-30 17:25 ` [PATCH v3 3/6] resource: Introduce resource_union() for overlapping resources Andy Shevchenko
2020-10-30 17:25 ` [PATCH v3 4/6] resource: Introduce resource_intersection() " Andy Shevchenko
2020-10-30 17:25 ` [PATCH v3 5/6] PCI/ACPI: Replace open coded variant of resource_union() Andy Shevchenko
2020-10-30 17:25 ` [PATCH v3 6/6] ACPI: watchdog: " Andy Shevchenko
2020-11-02 19:29 ` [PATCH v3 0/6] resource: introduce union(), intersection() API Rafael J. Wysocki
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