linux-kernel - [PATCH 1/5] arch/arc: unwind.c: replace swap function with built-in one

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Message-Id: <20170071553964024@myt2-dc4bba9bb23c.qloud-c.yandex.net>
Date:   Sat, 30 Mar 2019 19:40:24 +0300
From:   Andrey Abramov <st5pub@...dex.ru>
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Subject: [PATCH 1/5] arch/arc: unwind.c: replace swap function with built-in one

Replace swap_eh_frame_hdr_table_entries with built-in one, because
swap_eh_frame_hdr_table_entries does a simple byte to byte swap.

Signed-off-by: Andrey Abramov <st5pub@...dex.ru>
---
 arch/arc/kernel/unwind.c | 20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c
index 271e9fafa479..7610fe84afea 100644
--- a/arch/arc/kernel/unwind.c
+++ b/arch/arc/kernel/unwind.c
@@ -248,20 +248,6 @@ static int cmp_eh_frame_hdr_table_entries(const void *p1, const void *p2)
 	return (e1->start > e2->start) - (e1->start < e2->start);
 }
 
-static void swap_eh_frame_hdr_table_entries(void *p1, void *p2, int size)
-{
-	struct eh_frame_hdr_table_entry *e1 = p1;
-	struct eh_frame_hdr_table_entry *e2 = p2;
-	unsigned long v;
-
-	v = e1->start;
-	e1->start = e2->start;
-	e2->start = v;
-	v = e1->fde;
-	e1->fde = e2->fde;
-	e2->fde = v;
-}
-
 static void init_unwind_hdr(struct unwind_table *table,
 			    void *(*alloc) (unsigned long))
 {
@@ -354,10 +340,8 @@ static void init_unwind_hdr(struct unwind_table *table,
 	}
 	WARN_ON(n != header->fde_count);
 
-	sort(header->table,
-	     n,
-	     sizeof(*header->table),
-	     cmp_eh_frame_hdr_table_entries, swap_eh_frame_hdr_table_entries);
+	sort(header->table, n,
+	     sizeof(*header->table), cmp_eh_frame_hdr_table_entries, NULL);
 
 	table->hdrsz = hdrSize;
 	smp_wmb();
-- 
2.21.0