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From: Nam Cao <namcao@linutronix.de>
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To: Thomas =?utf-8?Q?Wei=C3=9Fschuh?= <thomas.weissschuh@linutronix.de>,
 Paul Walmsley
 <pjw@kernel.org>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou
 <aou@eecs.berkeley.edu>, Alexandre Ghiti <alex@ghiti.fr>, Nathan
 Chancellor <nathan@kernel.org>, Conor Dooley <conor.dooley@microchip.com>,
 Wende Tan <twd2.me@gmail.com>
Cc: Palmer Dabbelt <palmer@rivosinc.com>, linux-riscv@lists.infradead.org,
 linux-kernel@vger.kernel.org, Thomas =?utf-8?Q?Wei=C3=9Fschuh?=
 <thomas.weissschuh@linutronix.de>, kernel test robot <lkp@intel.com>,
 stable@vger.kernel.org
Subject: Re: [PATCH 0/2] riscv: vdso: Do not use LTO for the vDSO
In-Reply-To: <20260701-riscv-vdso-lto-v1-0-89db0cd82077@linutronix.de>
References: <20260701-riscv-vdso-lto-v1-0-89db0cd82077@linutronix.de>
Date: Thu, 02 Jul 2026 11:38:26 +0200
Message-ID: <87bjcpu3xp.fsf@yellow.woof>
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Thomas Wei=C3=9Fschuh <thomas.weissschuh@linutronix.de> writes:
> With LTO enabled the compiler assumes that the vDSO functions are not
> used and optimizes them away completely.
>
> Disable LTO for the vDSO, as these functions are hand-optimized anyways.
>
> Signed-off-by: Thomas Wei=C3=9Fschuh <thomas.weissschuh@linutronix.de>

Reviewed-by: Nam Cao <namcao@linutronix.de>