From nobody Thu Apr 9 13:31:43 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D5EE63815E8 for ; Fri, 27 Feb 2026 06:43:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772174610; cv=none; b=GijbawT8k1qgcH3K8EjykPZo9RTtjopbMo1v4AADzlEf1ojn4H/FRG+oJ5/KRQ2k2fkUibsYhtYI1UDC21hiS4WXpdak3J/17KSx30Lg4l/76WQ03b44XtxXQ3n4AV+Yk2wh9CcLgQLQzssalo9p2DBvvmLLrxpgy+Co5Ifvxo8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772174610; c=relaxed/simple; bh=FWGn65km4mZGmqXRzZnz9sDOew6o+2aJLfEuo+bn3UI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=rGLct1aIisWayWYXuE2mM6IndNWKH2BW5b1aJVw/434yk5TfjdqhuXbK/bHlHDp6X6gaMdZiBvkVXZqYnmqHnrba7Vgv9SBMNyB0GsaxuGQ/S2/B6hW/GZHa9bUTDG+IozwBNHpX/1l4S0+FsFaUbsKZgMdNW6J5jtl10AUiLGI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=NE1SRM7M; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=xQxDSbgX; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="NE1SRM7M"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="xQxDSbgX" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1772174606; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=u7q4giRSxVgb3vhRVyBnmqHJAlGmF9q7NXovmHnnyhg=; b=NE1SRM7Mw2uGk71myIBLZMwBsiYv8OJYBuKJW1GaAiBDyprRhJUmcDdLZbRKmMtKyBWuuk rdVLC8UAVZ78lIEQTLmMj49mXv4W6rHm1Gqz1DFKkMjqJaTTMiI60L/xuZQc1aOENZQoOM xGGCVCfSS1to6MRHhdPejIEfLjr/xYDw+yNCZUsaG3n4SMqm2Xz8aJMVp1sr98Z8EXrh+w t+vSAV2OS+fnY/B5VkRdepvj4B3rNrnfrFM75GC0NFj58yofYY/jW0ajTkXyupApw6QLiy IhwOzn5WzuplZeeX0j9WanhW4d9mhv7FR4yY5bPoac8REwaEJfzplTi3ybJuNA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1772174606; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=u7q4giRSxVgb3vhRVyBnmqHJAlGmF9q7NXovmHnnyhg=; b=xQxDSbgXen0rL3P4kVgWWSHzb28Ok4mFXeFGzv3Zi603zoQzNenadlWdjGyfu/FpNcfiIU EMqT1mwu9eTEFcCw== Date: Fri, 27 Feb 2026 07:43:22 +0100 Subject: [PATCH 3/4] vdso/gettimeofday: Add a helper to test if a clock is namespaced Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260227-vdso-cleanups-v1-3-c848b4bc4850@linutronix.de> References: <20260227-vdso-cleanups-v1-0-c848b4bc4850@linutronix.de> In-Reply-To: <20260227-vdso-cleanups-v1-0-c848b4bc4850@linutronix.de> To: Andy Lutomirski , Thomas Gleixner , Vincenzo Frascino Cc: linux-kernel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Developer-Signature: v=1; a=ed25519-sha256; t=1772174604; l=2441; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=FWGn65km4mZGmqXRzZnz9sDOew6o+2aJLfEuo+bn3UI=; b=ObndgDaqQaieXld2J+oirgcjwxWoY0+SQORO9DeDr0J4bolYXqP6udVo8ueITgn0wG4f5OgUR 3NAYRxv1XcHAojQ80fsExkS8XZfbCOP0y/5VYE4PcOGujQqdJpKh/kG X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= Currently this logic is duplicate multiple times. Add a helper for it to make the code more readable. Signed-off-by: Thomas Wei=C3=9Fschuh --- include/vdso/helpers.h | 7 ++++++- lib/vdso/gettimeofday.c | 9 +++------ 2 files changed, 9 insertions(+), 7 deletions(-) diff --git a/include/vdso/helpers.h b/include/vdso/helpers.h index 0064c30cc40c..3dd67ed85c2e 100644 --- a/include/vdso/helpers.h +++ b/include/vdso/helpers.h @@ -7,6 +7,11 @@ #include #include =20 +static __always_inline bool vdso_is_timens_clock(const struct vdso_clock *= vc) +{ + return IS_ENABLED(CONFIG_TIME_NS) && vc->clock_mode =3D=3D VDSO_CLOCKMODE= _TIMENS; +} + static __always_inline u32 vdso_read_begin(const struct vdso_clock *vc) { u32 seq; @@ -32,7 +37,7 @@ static __always_inline u32 vdso_read_begin(const struct v= dso_clock *vc) static __always_inline bool vdso_read_begin_timens(const struct vdso_clock= *vc, u32 *seq) { while (unlikely((*seq =3D READ_ONCE(vc->seq)) & 1)) { - if (IS_ENABLED(CONFIG_TIME_NS) && vc->clock_mode =3D=3D VDSO_CLOCKMODE_T= IMENS) + if (vdso_is_timens_clock(vc)) return true; cpu_relax(); } diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c index e49369676928..2faed7851635 100644 --- a/lib/vdso/gettimeofday.c +++ b/lib/vdso/gettimeofday.c @@ -343,8 +343,7 @@ __cvdso_gettimeofday_data(const struct vdso_time_data *= vd, } =20 if (unlikely(tz !=3D NULL)) { - if (IS_ENABLED(CONFIG_TIME_NS) && - vc->clock_mode =3D=3D VDSO_CLOCKMODE_TIMENS) + if (vdso_is_timens_clock(vc)) vd =3D __arch_get_vdso_u_timens_data(vd); =20 tz->tz_minuteswest =3D vd[CS_HRES_COARSE].tz_minuteswest; @@ -367,8 +366,7 @@ __cvdso_time_data(const struct vdso_time_data *vd, __ke= rnel_old_time_t *time) const struct vdso_clock *vc =3D vd->clock_data; __kernel_old_time_t t; =20 - if (IS_ENABLED(CONFIG_TIME_NS) && - vc->clock_mode =3D=3D VDSO_CLOCKMODE_TIMENS) { + if (vdso_is_timens_clock(vc)) { vd =3D __arch_get_vdso_u_timens_data(vd); vc =3D vd->clock_data; } @@ -399,8 +397,7 @@ bool __cvdso_clock_getres_common(const struct vdso_time= _data *vd, clockid_t cloc if (!vdso_clockid_valid(clock)) return false; =20 - if (IS_ENABLED(CONFIG_TIME_NS) && - vc->clock_mode =3D=3D VDSO_CLOCKMODE_TIMENS) + if (vdso_is_timens_clock(vc)) vd =3D __arch_get_vdso_u_timens_data(vd); =20 /* --=20 2.53.0