linux-kernel - [tip: x86/kaslr] x86/kaslr: Drop redundant cur_entry from __process_mem

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Message-ID: <159675714018.3192.1265605139963105539.tip-bot2@tip-bot2>
Date:   Thu, 06 Aug 2020 23:39:00 -0000
From:   "tip-bot2 for Arvind Sankar" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Arvind Sankar <nivedita@...m.mit.edu>,
        Ingo Molnar <mingo@...nel.org>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/kaslr] x86/kaslr: Drop redundant cur_entry from
 __process_mem_region()

The following commit has been merged into the x86/kaslr branch of tip:

Commit-ID:     3f9412c73053a5be311607e42560c1303a873be7
Gitweb:        https://git.kernel.org/tip/3f9412c73053a5be311607e42560c1303a873be7
Author:        Arvind Sankar <nivedita@...m.mit.edu>
AuthorDate:    Tue, 28 Jul 2020 18:57:07 -04:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Fri, 31 Jul 2020 11:08:17 +02:00

x86/kaslr: Drop redundant cur_entry from __process_mem_region()

cur_entry is only used as cur_entry.start + cur_entry.size, which is
always equal to end.

Signed-off-by: Arvind Sankar <nivedita@...m.mit.edu>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/20200728225722.67457-7-nivedita@alum.mit.edu
---
 arch/x86/boot/compressed/kaslr.c |  9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 848346f..f2454ee 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -624,7 +624,6 @@ static void __process_mem_region(struct mem_vector *entry,
 {
 	struct mem_vector region, overlap;
 	unsigned long start_orig, end;
-	struct mem_vector cur_entry;
 
 	/* Ignore entries entirely below our minimum. */
 	if (entry->start + entry->size < minimum)
@@ -634,11 +633,9 @@ static void __process_mem_region(struct mem_vector *entry,
 	end = min(entry->size + entry->start, mem_limit);
 	if (entry->start >= end)
 		return;
-	cur_entry.start = entry->start;
-	cur_entry.size = end - entry->start;
 
-	region.start = cur_entry.start;
-	region.size = cur_entry.size;
+	region.start = entry->start;
+	region.size = end - entry->start;
 
 	/* Give up if slot area array is full. */
 	while (slot_area_index < MAX_SLOT_AREA) {
@@ -652,7 +649,7 @@ static void __process_mem_region(struct mem_vector *entry,
 		region.start = ALIGN(region.start, CONFIG_PHYSICAL_ALIGN);
 
 		/* Did we raise the address above the passed in memory entry? */
-		if (region.start > cur_entry.start + cur_entry.size)
+		if (region.start > end)
 			return;
 
 		/* Reduce size by any delta from the original address. */