From: Christopher Covington <cov@codeaurora.org>
Date: Wed, 3 Apr 2013 18:01:01 +0000 (+0100)
Subject: arm64: Fix task tracing
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3325732f3b223812e54ac67dbb0a8ea7c99cf519;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

arm64: Fix task tracing

For accurate accounting call contextidr_thread_switch before a
task is scheduled, rather than after, when the 'next' variable has a
different meaning since we switched the stacks.

Signed-off-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 0337cdb0667b..c2cc2493481b 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -311,11 +311,11 @@ struct task_struct *__switch_to(struct task_struct *prev,
 	fpsimd_thread_switch(next);
 	tls_thread_switch(next);
 	hw_breakpoint_thread_switch(next);
+	contextidr_thread_switch(next);
 
 	/* the actual thread switch */
 	last = cpu_switch_to(prev, next);
 
-	contextidr_thread_switch(next);
 	return last;
 }