From: Colin Cross <ccross@android.com>
Date: Sat, 17 Sep 2011 01:41:06 +0000 (-0700)
Subject: Revert "ARM: vfp: ensure that thread flushing works if preempted"
X-Git-Tag: firefly_0821_release~7613^2~302
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5b82de08fff8b06d3facdacf38255f20f7769382;p=firefly-linux-kernel-4.4.55.git

Revert "ARM: vfp: ensure that thread flushing works if preempted"

This reverts commit 4f77fd436e53acf5bc0a06a24331f64b07fb33ec.
---

diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 50dbe3545c04..445a99610a10 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -89,27 +89,24 @@ static void vfp_thread_flush(struct thread_info *thread)
 	union vfp_state *vfp = &thread->vfpstate;
 	unsigned int cpu;
 
+	memset(vfp, 0, sizeof(union vfp_state));
+
+	vfp->hard.fpexc = FPEXC_EN;
+	vfp->hard.fpscr = FPSCR_ROUND_NEAREST;
+#ifdef CONFIG_SMP
+	vfp->hard.cpu = NR_CPUS;
+#endif
+
 	/*
 	 * Disable VFP to ensure we initialize it first.  We must ensure
-	 * that the modification of vfp_current_hw_state[] and hardware
-	 * disable are done for the same CPU and without preemption.
-	 *
-	 * Do this first to ensure that preemption won't overwrite our
-	 * state saving should access to the VFP be enabled at this point.
+	 * that the modification of vfp_current_hw_state[] and hardware disable
+	 * are done for the same CPU and without preemption.
 	 */
 	cpu = get_cpu();
 	if (vfp_current_hw_state[cpu] == vfp)
 		vfp_current_hw_state[cpu] = NULL;
 	fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
 	put_cpu();
-
-	memset(vfp, 0, sizeof(union vfp_state));
-
-	vfp->hard.fpexc = FPEXC_EN;
-	vfp->hard.fpscr = FPSCR_ROUND_NEAREST;
-#ifdef CONFIG_SMP
-	vfp->hard.cpu = NR_CPUS;
-#endif
 }
 
 static void vfp_thread_exit(struct thread_info *thread)