From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Richard Henderson <richard.henderson@linaro.org>,
Matt Turner <mattst88@gmail.com>,
Magnus Lindholm <linmag7@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
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Huacai Chen <chenhuacai@kernel.org>,
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Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
"Christophe Leroy (CS GROUP)" <chleroy@kernel.org>,
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Palmer Dabbelt <palmer@dabbelt.com>,
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Li Nan <linan122@huawei.com>, "Theodore Ts'o" <tytso@mit.edu>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
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linux-raid@vger.kernel.org
Subject: [PATCH 01/27] xor: assert that xor_blocks is not from preemptible user context
Date: Wed, 11 Mar 2026 08:03:33 +0100 [thread overview]
Message-ID: <20260311070416.972667-2-hch@lst.de> (raw)
In-Reply-To: <20260311070416.972667-1-hch@lst.de>
Most of the optimized xor_blocks versions require FPU/vector registers,
which generally are not supported in interrupt context.
Both callers already are in user context, so enforce this at the highest
level.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
crypto/xor.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/crypto/xor.c b/crypto/xor.c
index f39621a57bb3..676d7401af43 100644
--- a/crypto/xor.c
+++ b/crypto/xor.c
@@ -28,6 +28,8 @@ xor_blocks(unsigned int src_count, unsigned int bytes, void *dest, void **srcs)
{
unsigned long *p1, *p2, *p3, *p4;
+ lockdep_assert_preemption_enabled();
+
p1 = (unsigned long *) srcs[0];
if (src_count == 1) {
active_template->do_2(bytes, dest, p1);
--
2.47.3
next prev parent reply other threads:[~2026-03-11 7:05 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-11 7:03 cleanup the RAID5 XOR library v2 Christoph Hellwig
2026-03-11 7:03 ` Christoph Hellwig [this message]
2026-03-11 7:03 ` [PATCH 02/27] arm/xor: remove in_interrupt() handling Christoph Hellwig
2026-03-11 7:03 ` [PATCH 03/27] um/xor: cleanup xor.h Christoph Hellwig
2026-03-11 8:45 ` Richard Weinberger
2026-03-11 7:03 ` [PATCH 04/27] xor: move to lib/raid/ Christoph Hellwig
2026-03-11 7:03 ` [PATCH 05/27] xor: small cleanups Christoph Hellwig
2026-03-11 7:03 ` [PATCH 06/27] xor: cleanup registration and probing Christoph Hellwig
2026-03-11 7:03 ` [PATCH 07/27] xor: split xor.h Christoph Hellwig
2026-03-11 7:03 ` [PATCH 08/27] xor: remove macro abuse for XOR implementation registrations Christoph Hellwig
2026-03-11 7:03 ` [PATCH 09/27] xor: move generic implementations out of asm-generic/xor.h Christoph Hellwig
2026-03-11 7:03 ` [PATCH 10/27] alpha: move the XOR code to lib/raid/ Christoph Hellwig
2026-03-16 22:12 ` Magnus Lindholm
2026-03-11 7:03 ` [PATCH 11/27] arm: " Christoph Hellwig
2026-03-11 7:03 ` [PATCH 12/27] arm64: " Christoph Hellwig
2026-03-11 7:03 ` [PATCH 13/27] loongarch: " Christoph Hellwig
2026-03-11 7:03 ` [PATCH 14/27] powerpc: " Christoph Hellwig
2026-03-11 7:03 ` [PATCH 15/27] riscv: " Christoph Hellwig
2026-03-11 7:03 ` [PATCH 16/27] sparc: " Christoph Hellwig
2026-03-11 7:03 ` [PATCH 17/27] s390: " Christoph Hellwig
2026-03-11 7:03 ` [PATCH 18/27] x86: " Christoph Hellwig
2026-03-11 7:03 ` [PATCH 19/27] xor: avoid indirect calls for arm64-optimized ops Christoph Hellwig
2026-03-11 7:03 ` [PATCH 20/27] xor: make xor.ko self-contained in lib/raid/ Christoph Hellwig
2026-03-11 7:03 ` [PATCH 21/27] xor: add a better public API Christoph Hellwig
2026-03-11 7:03 ` [PATCH 22/27] async_xor: use xor_gen Christoph Hellwig
2026-03-11 7:03 ` [PATCH 23/27] btrfs: " Christoph Hellwig
2026-03-12 6:14 ` David Sterba
2026-03-11 7:03 ` [PATCH 24/27] xor: pass the entire operation to the low-level ops Christoph Hellwig
2026-03-11 7:03 ` [PATCH 25/27] xor: use static_call for xor_gen Christoph Hellwig
2026-03-11 7:03 ` [PATCH 26/27] random: factor out a __limit_random_u32_below helper Christoph Hellwig
2026-03-11 22:29 ` Eric Biggers
2026-03-12 8:38 ` David Laight
2026-03-12 13:46 ` Jason A. Donenfeld
2026-03-11 7:03 ` [PATCH 27/27] xor: add a kunit test case Christoph Hellwig
2026-03-12 0:54 ` Eric Biggers
2026-03-11 18:57 ` cleanup the RAID5 XOR library v2 Andrew Morton
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