linux-kernel - [PATCH v2 5/8] lib: vdso: Remove checks on return value for 32 bit vDSO

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Date:   Fri, 30 Aug 2019 14:58:59 +0100
From:   Vincenzo Frascino <vincenzo.frascino@....com>
To:     linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     catalin.marinas@....com, will@...nel.org, paul.burton@...s.com,
        tglx@...utronix.de, salyzyn@...roid.com, 0x7f454c46@...il.com,
        luto@...nel.org
Subject: [PATCH v2 5/8] lib: vdso: Remove checks on return value for 32 bit vDSO

Since all the architectures that support the generic vDSO library have
been converted to support the 32 bit fallbacks it is not required
anymore to check the return value of __cvdso_clock_get*time32_common()
before updating the old_timespec fields.

Remove the related checks from the generic vdso library.

Cc: Thomas Gleixner <tglx@...utronix.de>
CC: Andy Lutomirski <luto@...nel.org>
References: c60a32ea4f45 ("lib/vdso/32: Provide legacy syscall fallbacks")
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>
---
 lib/vdso/gettimeofday.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c
index 2c4b311c226d..d5bc16748f81 100644
--- a/lib/vdso/gettimeofday.c
+++ b/lib/vdso/gettimeofday.c
@@ -129,10 +129,10 @@ __cvdso_clock_gettime32(clockid_t clock, struct old_timespec32 *res)
 	if (unlikely(ret))
 		return clock_gettime32_fallback(clock, res);
 
-	if (likely(!ret)) {
-		res->tv_sec = ts.tv_sec;
-		res->tv_nsec = ts.tv_nsec;
-	}
+	/* For ret == 0 */
+	res->tv_sec = ts.tv_sec;
+	res->tv_nsec = ts.tv_nsec;
+
 	return ret;
 }
 #endif /* BUILD_VDSO32 */
@@ -238,10 +238,10 @@ __cvdso_clock_getres_time32(clockid_t clock, struct old_timespec32 *res)
 	if (unlikely(ret))
 		return clock_getres32_fallback(clock, res);
 
-	if (likely(!ret)) {
-		res->tv_sec = ts.tv_sec;
-		res->tv_nsec = ts.tv_nsec;
-	}
+	/* For ret == 0 */
+	res->tv_sec = ts.tv_sec;
+	res->tv_nsec = ts.tv_nsec;
+
 	return ret;
 }
 #endif /* BUILD_VDSO32 */
-- 
2.23.0