kcov: remove pointless current != NULL check

__sanitizer_cov_trace_pc() is a hot code, so it's worth to remove
pointless '!current' check.  Current is never NULL.

Link: http://lkml.kernel.org/r/20170929162221.32500-1-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/kcov.c b/kernel/kcov.c
index fc6af9e..d9f9fa9 100644 (file)
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -62,7 +62,7 @@ void notrace __sanitizer_cov_trace_pc(void)
         * We are interested in code coverage as a function of a syscall inputs,
         * so we ignore code executed in interrupts.
         */
-       if (!t || !in_task())
+       if (!in_task())
                return;
        mode = READ_ONCE(t->kcov_mode);
        if (mode == KCOV_MODE_TRACE) {