diff options
| author | Leonid Yegoshin | 2013-12-16 13:06:55 +0100 |
|---|---|---|
| committer | Ralf Baechle | 2014-03-26 23:09:18 +0100 |
| commit | 6ebda44f366478d1eea180d93154e7d97b591f50 (patch) | |
| tree | 88a32637a7ad46a690692a3603b369c4f9485515 /arch/mips/kernel/ftrace.c | |
| parent | MIPS: asm: r4kcache: Add EVA cache flushing functions (diff) | |
| download | kernel-qcow2-linux-6ebda44f366478d1eea180d93154e7d97b591f50.tar.gz kernel-qcow2-linux-6ebda44f366478d1eea180d93154e7d97b591f50.tar.xz kernel-qcow2-linux-6ebda44f366478d1eea180d93154e7d97b591f50.zip | |
MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes
When flushing the icache, make sure the address limit is correct
so the appropriate 'cache' instruction will be used. This has no
impact on cores operating in non-eva mode. However, when EVA is
enabled, we ensure that 'cache' will be used instead of 'cachee'.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Diffstat (limited to 'arch/mips/kernel/ftrace.c')
| -rw-r--r-- | arch/mips/kernel/ftrace.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c index 185ba258361b..ddcc3500248d 100644 --- a/arch/mips/kernel/ftrace.c +++ b/arch/mips/kernel/ftrace.c @@ -90,6 +90,7 @@ 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); @@ -97,7 +98,10 @@ static int ftrace_modify_code(unsigned long ip, unsigned int new_code) if (unlikely(faulted)) return -EFAULT; + old_fs = get_fs(); + set_fs(get_ds()); flush_icache_range(ip, ip + 8); + set_fs(old_fs); return 0; } |