linux-kernel - [PATCH] crypto: LLVMLinux: aligned-attribute.patch

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Date:	Thu, 27 Mar 2014 14:41:37 -0700
From:	behanw@...verseincode.com
To:	herbert@...dor.apana.org.au, davem@...emloft.net
Cc:	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, dwmw2@...radead.org,
	pageexec@...email.hu, Mark Charlebois <charlebm@...il.com>,
	Behan Webster <behanw@...verseincode.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jonathan Corbet <corbet@....net>
Subject: [PATCH] crypto: LLVMLinux: aligned-attribute.patch

From: Mark Charlebois <charlebm@...il.com>

__attribute__((aligned)) applies the default alignment for the largest scalar
type for the target ABI. gcc allows it to be applied inline to a defined type.
Clang only allows it to be applied to a type definition (PR11071).

Making it into 2 lines makes it more readable and works with both compilers.

Author: Mark Charlebois <charlebm@...il.com>
Signed-off-by: Mark Charlebois <charlebm@...il.com>
Signed-off-by: Behan Webster <behanw@...verseincode.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Jonathan Corbet <corbet@....net>
---
 crypto/shash.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crypto/shash.c b/crypto/shash.c
index 929058a..47c7139 100644
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -67,7 +67,8 @@ EXPORT_SYMBOL_GPL(crypto_shash_setkey);
 static inline unsigned int shash_align_buffer_size(unsigned len,
 						   unsigned long mask)
 {
-	return len + (mask & ~(__alignof__(u8 __attribute__ ((aligned))) - 1));
+	typedef u8 __attribute__ ((aligned)) u8_aligned;
+	return len + (mask & ~(__alignof__(u8_aligned) - 1));
 }
 
 static int shash_update_unaligned(struct shash_desc *desc, const u8 *data,
-- 
1.8.3.2

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