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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>
This commit is contained in:
Thomas Bogendoerfer 2021-04-01 14:56:34 +02:00
parent dfad83cb71
commit 9a91dd501c
1 changed files with 0 additions and 8 deletions
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8
arch/mips/kernel/ftrace.c
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@ -90,7 +90,6 @@ static int ftrace_modify_code_2(unsigned long ip, unsigned int new_code1,
unsigned int new_code2) unsigned int new_code2)
{ {
int faulted; int faulted;
mm_segment_t old_fs;
safe_store_code(new_code1, ip, faulted); safe_store_code(new_code1, ip, faulted);
if (unlikely(faulted)) if (unlikely(faulted))
@ -102,10 +101,7 @@ static int ftrace_modify_code_2(unsigned long ip, unsigned int new_code1,
return -EFAULT; return -EFAULT;
ip -= 4; ip -= 4;
old_fs = get_fs();
set_fs(KERNEL_DS);
flush_icache_range(ip, ip + 8); flush_icache_range(ip, ip + 8);
set_fs(old_fs);
return 0; return 0;
} }
@ -114,7 +110,6 @@ static int ftrace_modify_code_2r(unsigned long ip, unsigned int new_code1,
unsigned int new_code2) unsigned int new_code2)
{ {
int faulted; int faulted;
mm_segment_t old_fs;
ip += 4; ip += 4;
safe_store_code(new_code2, ip, faulted); 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)) if (unlikely(faulted))
return -EFAULT; return -EFAULT;
old_fs = get_fs();
set_fs(KERNEL_DS);
flush_icache_range(ip, ip + 8); flush_icache_range(ip, ip + 8);
set_fs(old_fs);
return 0; return 0;
} }