[PATCH 01/25] xor: assert that xor_blocks is not called from interrupt context

[Christoph Hellwig]

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@xxxxxx>
---
 crypto/xor.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/crypto/xor.c b/crypto/xor.c
index f39621a57bb3..864f3604e867 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_interrupt());
+
 	p1 = (unsigned long *) srcs[0];
 	if (src_count == 1) {
 		active_template->do_2(bytes, dest, p1);
-- 
2.47.3