[PATCH 01/28] xor: assert that xor_blocks is not call from interrupt context

Christoph Hellwig
2026-03-27T06:17:59Z

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..df530ddc9f06 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;

+ WARN_ON_ONCE(!in_task() || irqs_disabled() || softirq_count());
+
p1 = (unsigned long *) srcs[0];
if (src_count == 1) {
active_template->do_2(bytes, dest, p1);
--
2.47.3