linux-kernel - [PATCH v3 08/21] x86/kaslr: Drop redundant variable in __process_mem

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Message-Id: <20200728225722.67457-9-nivedita@alum.mit.edu>
Date:   Tue, 28 Jul 2020 18:57:09 -0400
From:   Arvind Sankar <nivedita@...m.mit.edu>
To:     Kees Cook <keescook@...omium.org>, x86@...nel.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH v3 08/21] x86/kaslr: Drop redundant variable in __process_mem_region

region.size can be trimmed to store the portion of the region before the
overlap, instead of a separate mem_vector variable.

Signed-off-by: Arvind Sankar <nivedita@...m.mit.edu>
---
 arch/x86/boot/compressed/kaslr.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index e978c3508814..8cc47faea56d 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -664,11 +664,8 @@ static void __process_mem_region(struct mem_vector *entry,
 
 		/* Store beginning of region if holds at least image_size. */
 		if (overlap.start >= region.start + image_size) {
-			struct mem_vector beginning;
-
-			beginning.start = region.start;
-			beginning.size = overlap.start - region.start;
-			process_gb_huge_pages(&beginning, image_size);
+			region.size = overlap.start - region.start;
+			process_gb_huge_pages(&region, image_size);
 		}
 
 		/* Return if overlap extends to or past end of region. */
-- 
2.26.2