From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 24 Nov 2009 08:56:17 +0000 (+0900)
Subject: sh: Apply the sleazy FPU changes for SH-2A FPU as well.
X-Git-Tag: upstream/snapshot3+hdmi~16124^2~59
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0f09e197a39c081fa8c2752ee65919cb6cba963a;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

sh: Apply the sleazy FPU changes for SH-2A FPU as well.

This plugs in the fpu_counter manipulation for the SH-2A side also.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/arch/sh/kernel/cpu/sh2a/fpu.c b/arch/sh/kernel/cpu/sh2a/fpu.c
index 13817ee..d395ce5 100644
--- a/arch/sh/kernel/cpu/sh2a/fpu.c
+++ b/arch/sh/kernel/cpu/sh2a/fpu.c
@@ -608,18 +608,18 @@ BUILD_TRAP_HANDLER(fpu_error)
 	force_sig(SIGFPE, tsk);
 }
 
-BUILD_TRAP_HANDLER(fpu_state_restore)
+void fpu_state_restore(struct pt_regs *regs)
 {
 	struct task_struct *tsk = current;
-	TRAP_HANDLER_DECL;
 
 	grab_fpu(regs);
-	if (!user_mode(regs)) {
+	if (unlikely(!user_mode(regs))) {
 		printk(KERN_ERR "BUG: FPU is used in kernel mode.\n");
+		BUG();
 		return;
 	}
 
-	if (used_math()) {
+	if (likely(used_math())) {
 		/* Using the FPU again.  */
 		restore_fpu(tsk);
 	} else	{
@@ -628,4 +628,12 @@ BUILD_TRAP_HANDLER(fpu_state_restore)
 		set_used_math();
 	}
 	task_thread_info(tsk)->status |= TS_USEDFPU;
+	tsk->fpu_counter++;
+}
+
+BUILD_TRAP_HANDLER(fpu_state_restore)
+{
+	TRAP_HANDLER_DECL;
+
+	fpu_state_restore(regs);
 }