Commit ef91bb19 authored Aug 28, 2020 by Herbert Xu Committed by Linus Torvalds Aug 28, 2020

kernel.h: Silence sparse warning in lower_32_bits



I keep getting sparse warnings in crypto such as:

  CHECK   drivers/crypto/ccree/cc_hash.c
   drivers/crypto/ccree/cc_hash.c:49:9: warning: cast truncates bits from constant value (47b5481dbefa4fa4 becomes befa4fa4)
   drivers/crypto/ccree/cc_hash.c:49:26: warning: cast truncates bits from constant value (db0c2e0d64f98fa7 becomes 64f98fa7)
   [.. many more ..]

This patch removes the warning by adding a mask to keep sparse
happy.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent e3094285

include/linux/kernel.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -186,7 +186,7 @@
		* lower_32_bits - return bits 0-31 of a number
		* @n: the number we're accessing
		*/
		#define lower_32_bits(n) ((u32)(n))
		#define lower_32_bits(n) ((u32)((n) & 0xffffffff))

		struct completion;
		struct pt_regs;

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