From 9a91dd501c2b98b6a1677affa514e30452b9c908 Mon Sep 17 00:00:00 2001
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: Thu, 1 Apr 2021 14:56:34 +0200
Subject: [PATCH] MIPS: kernel: Remove not needed set_fs calls
flush_icache_range always does flush kernel address ranges, so no
need to do the set_fs dance.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
arch/mips/kernel/ftrace.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c
index 666b9969c1bda..8c401e42301cb 100644
--- a/arch/mips/kernel/ftrace.c
+++ b/arch/mips/kernel/ftrace.c
@@ -90,7 +90,6 @@ static int ftrace_modify_code_2(unsigned long ip, unsigned int new_code1,
unsigned int new_code2)
{
int faulted;
- mm_segment_t old_fs;
safe_store_code(new_code1, ip, faulted);
if (unlikely(faulted))
@@ -102,10 +101,7 @@ static int ftrace_modify_code_2(unsigned long ip, unsigned int new_code1,
return -EFAULT;
ip -= 4;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
flush_icache_range(ip, ip + 8);
- set_fs(old_fs);
return 0;
}
@@ -114,7 +110,6 @@ static int ftrace_modify_code_2r(unsigned long ip, unsigned int new_code1,
unsigned int new_code2)
{
int faulted;
- mm_segment_t old_fs;
ip += 4;
safe_store_code(new_code2, ip, faulted);
@@ -126,10 +121,7 @@ static int ftrace_modify_code_2r(unsigned long ip, unsigned int new_code1,
if (unlikely(faulted))
return -EFAULT;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
flush_icache_range(ip, ip + 8);
- set_fs(old_fs);
return 0;
}
--
GitLab