sh: Optimized flush_icache_range() implementation.

Add implementation of flush_icache_range() suitable for signal handler
and kprobes. Remove flush_cache_sigtramp() and change signal.c to use
flush_icache_range().

Signed-off-by: Chris Smith <chris.smith@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 2 insertions, 8 deletions

diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 46170a9a7221..eee29257a8ae 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -398,10 +398,7 @@ static int setup_frame(int sig, struct k_sigaction *ka,
         pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n",
                  current->comm, task_pid_nr(current), frame, regs->pc, regs->pr);
 
-        flush_cache_sigtramp(regs->pr);
-
-        if ((-regs->pr & (L1_CACHE_BYTES-1)) < sizeof(frame->retcode))
-                flush_cache_sigtramp(regs->pr + L1_CACHE_BYTES);
+        flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));
 
         return 0;
 
@@ -486,10 +483,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n",
                  current->comm, task_pid_nr(current), frame, regs->pc, regs->pr);
 
-        flush_cache_sigtramp(regs->pr);
-
-        if ((-regs->pr & (L1_CACHE_BYTES-1)) < sizeof(frame->retcode))
-                flush_cache_sigtramp(regs->pr + L1_CACHE_BYTES);
+        flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));
 
         return 0;