linux-kernel - [PATCH] mm/hmm.c: remove redundant variables align_start and align

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Message-Id: <20180714161124.3923-1-colin.king@canonical.com>
Date:   Sat, 14 Jul 2018 17:11:24 +0100
From:   Colin King <colin.king@...onical.com>
To:     Jérôme Glisse <jglisse@...hat.com>,
        linux-mm@...ck.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mm/hmm.c: remove redundant variables align_start and align_end

From: Colin Ian King <colin.king@...onical.com>

Variables align_start and align_end are being assigned but are
never used hence they are redundant and can be removed.

Cleans up clang warnings:
warning: variable 'align_start' set but not used [-Wunused-but-set-variable]
warning: variable 'align_size' set but not used [-Wunused-but-set-variable]

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 mm/hmm.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/mm/hmm.c b/mm/hmm.c
index caf9df27599e..76e7a058b32f 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -973,10 +973,7 @@ static RADIX_TREE(hmm_devmem_radix, GFP_KERNEL);
 
 static void hmm_devmem_radix_release(struct resource *resource)
 {
-	resource_size_t key, align_start, align_size;
-
-	align_start = resource->start & ~(PA_SECTION_SIZE - 1);
-	align_size = ALIGN(resource_size(resource), PA_SECTION_SIZE);
+	resource_size_t key;
 
 	mutex_lock(&hmm_devmem_lock);
 	for (key = resource->start;
-- 
2.17.1