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 0337cdb..c2cc249 100644 (file)
--- 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;
 }