From: Borislav Petkov <bp@alien8.de>
To: Eric Biggers <ebiggers@kernel.org>
Cc: x86@kernel.org, Thomas Gleixner <tglx@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
linux-kernel@vger.kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH] x86/fpu: Remove unnecessary checks for X86_FEATURE_FPU
Date: Wed, 23 Sep 2026 14:14:50 -0700 [thread overview]
Message-ID: <20260923211450.GBarRBSoXGFKvUBwe7@fat_crate.local> (raw)
In-Reply-To: <20260831185706.90103-1-ebiggers@kernel.org>
On Mon, Aug 31, 2026 at 11:57:06AM -0700, Eric Biggers wrote:
> Since commit ab05214025ee ("x86/fpu: Remove MATH_EMULATION and related
> glue code"), X86_FEATURE_FPU is mandatory. If it's absent, the kernel
> halts execution in fpu__init_system_early_generic(). Remove unnecessary
> checks for X86_FEATURE_FPU that occur later in core x86 code.
>
> Signed-off-by: Eric Biggers <ebiggers@kernel.org>
> ---
> arch/x86/kernel/fpu/bugs.c | 4 ----
> arch/x86/kernel/fpu/core.c | 2 +-
> arch/x86/kernel/fpu/init.c | 2 --
> arch/x86/kernel/fpu/xstate.c | 5 -----
> 4 files changed, 1 insertion(+), 12 deletions(-)
Sashiko might have a point here:
https://sashiko.dev/#/patchset/20260831185706.90103-1-ebiggers%40kernel.org
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2026-09-23 21:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-31 18:57 Eric Biggers
2026-08-31 19:59 ` H. Peter Anvin
2026-09-23 21:14 ` Borislav Petkov [this message]
2026-09-24 3:24 ` Eric Biggers
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