From b1468f3071f7312bdc78c380dd01273b5e4459c1 Mon Sep 17 00:00:00 2001 From: Thomas Bogendoerfer Date: Wed, 10 Feb 2021 17:16:13 +0100 Subject: Revert "MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes" This reverts commit 6ebda44f366478d1eea180d93154e7d97b591f50. All icache flushes in this code paths are done via flush_icache_range(), which only uses normal cache instruction. And this is the correct thing for EVA mode, too. So no need to do set_fs(KERNEL_DS) here. Signed-off-by: Thomas Bogendoerfer Reviewed-by: Christoph Hellwig --- arch/mips/kernel/ftrace.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'arch/mips/kernel/ftrace.c') diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c index f57e68f40a34..666b9969c1bd 100644 --- a/arch/mips/kernel/ftrace.c +++ b/arch/mips/kernel/ftrace.c @@ -73,7 +73,6 @@ static inline void ftrace_dyn_arch_init_insns(void) static int ftrace_modify_code(unsigned long ip, unsigned int new_code) { int faulted; - mm_segment_t old_fs; /* *(unsigned int *)ip = new_code; */ safe_store_code(new_code, ip, faulted); @@ -81,10 +80,7 @@ static int ftrace_modify_code(unsigned long ip, unsigned int new_code) 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; } -- cgit v1.2.3