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crypto: Replaced gcc specific attributes with macros from compiler.h 

Continuing from this commit: 52f5684c8e
("kernel: use macros from compiler.h instead of __attribute__((...))")

I submitted 4 total patches. They are part of task I've taken up to
increase compiler portability in the kernel. I've cleaned up the
subsystems under /kernel /mm /block and /security, this patch targets
/crypto.

There is <linux/compiler.h> which provides macros for various gcc specific
constructs. Eg: __weak for __attribute__((weak)). I've cleaned all
instances of gcc specific attributes with the right macros for the crypto
subsystem.

I had to make one additional change into compiler-gcc.h for the case when
one wants to use this: __attribute__((aligned) and not specify an alignment
factor. From the gcc docs, this will result in the largest alignment for
that data type on the target machine so I've named the macro
__aligned_largest. Please advise if another name is more appropriate.

Signed-off-by: Gideon Israel Dsouza <gidisrael@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
zero-colors
Gideon Israel Dsouza 2016-12-31 21:26:23 +05:30 committed by Herbert Xu
parent d2110224a6
commit d8c34b949d
14 changed files with 34 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
crypto/ablkcipher.c
View File

@ -19,6 +19,7 @@
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include <crypto/scatterwalk.h>
@ -394,7 +395,7 @@ static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher;
@ -468,7 +469,7 @@ static int crypto_givcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher;

3
crypto/acompress.c
View File

@ -20,6 +20,7 @@
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include <crypto/internal/acompress.h>
#include <crypto/internal/scompress.h>
@ -50,7 +51,7 @@ static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
{

3
crypto/aead.c
View File

@ -24,6 +24,7 @@
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include "internal.h"
@ -132,7 +133,7 @@ static int crypto_aead_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg)
{
struct aead_alg *aead = container_of(alg, struct aead_alg, base);

3
crypto/ahash.c
View File

@ -23,6 +23,7 @@
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include "internal.h"
@ -493,7 +494,7 @@ static int crypto_ahash_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
{
seq_printf(m, "type : ahash\n");

3
crypto/akcipher.c
View File

@ -17,6 +17,7 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/crypto.h>
#include <linux/compiler.h>
#include <crypto/algapi.h>
#include <linux/cryptouser.h>
#include <net/netlink.h>
@ -47,7 +48,7 @@ static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
{

7
crypto/blkcipher.c
View File

@ -1,6 +1,6 @@
/*
* Block chaining cipher operations.
*
*
* Generic encrypt/decrypt wrapper for ciphers, handles operations across
* multiple page boundaries by using temporary blocks. In user context,
* the kernel is given a chance to schedule us once per page.
@ -9,7 +9,7 @@
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include "internal.h"
@ -534,7 +535,7 @@ static int crypto_blkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
seq_printf(m, "type : blkcipher\n");

5
crypto/cts.c
View File

@ -49,6 +49,7 @@
#include <linux/scatterlist.h>
#include <crypto/scatterwalk.h>
#include <linux/slab.h>
#include <linux/compiler.h>
struct crypto_cts_ctx {
struct crypto_skcipher *child;
@ -103,7 +104,7 @@ static int cts_cbc_encrypt(struct skcipher_request *req)
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct skcipher_request *subreq = &rctx->subreq;
int bsize = crypto_skcipher_blocksize(tfm);
u8 d[bsize * 2] __attribute__ ((aligned(__alignof__(u32))));
u8 d[bsize * 2] __aligned(__alignof__(u32));
struct scatterlist *sg;
unsigned int offset;
int lastn;
@ -183,7 +184,7 @@ static int cts_cbc_decrypt(struct skcipher_request *req)
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct skcipher_request *subreq = &rctx->subreq;
int bsize = crypto_skcipher_blocksize(tfm);
u8 d[bsize * 2] __attribute__ ((aligned(__alignof__(u32))));
u8 d[bsize * 2] __aligned(__alignof__(u32));
struct scatterlist *sg;
unsigned int offset;
u8 *space;

3
crypto/kpp.c
View File

@ -19,6 +19,7 @@
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include <crypto/kpp.h>
#include <crypto/internal/kpp.h>
@ -47,7 +48,7 @@ static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
{

3
crypto/pcbc.c
View File

@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/compiler.h>
struct crypto_pcbc_ctx {
struct crypto_cipher *child;
@ -146,7 +147,7 @@ static int crypto_pcbc_decrypt_inplace(struct skcipher_request *req,
unsigned int nbytes = walk->nbytes;
u8 *src = walk->src.virt.addr;
u8 *iv = walk->iv;
u8 tmpbuf[bsize] __attribute__ ((aligned(__alignof__(u32))));
u8 tmpbuf[bsize] __aligned(__alignof__(u32));
do {
memcpy(tmpbuf, src, bsize);

3
crypto/rng.c
View File

@ -23,6 +23,7 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include "internal.h"
@ -95,7 +96,7 @@ static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
{
seq_printf(m, "type : rng\n");

3
crypto/scompress.c
View File

@ -18,6 +18,7 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/crypto.h>
#include <linux/compiler.h>
#include <linux/vmalloc.h>
#include <crypto/algapi.h>
#include <linux/cryptouser.h>
@ -57,7 +58,7 @@ static int crypto_scomp_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_scomp_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_scomp_show(struct seq_file *m, struct crypto_alg *alg)
{

9
crypto/shash.c
View File

@ -19,6 +19,7 @@
#include <linux/seq_file.h>
#include <linux/cryptouser.h>
#include <net/netlink.h>
#include <linux/compiler.h>
#include "internal.h"
@ -67,7 +68,7 @@ EXPORT_SYMBOL_GPL(crypto_shash_setkey);
static inline unsigned int shash_align_buffer_size(unsigned len,
unsigned long mask)
{
typedef u8 __attribute__ ((aligned)) u8_aligned;
typedef u8 __aligned_largest u8_aligned;
return len + (mask & ~(__alignof__(u8_aligned) - 1));
}
@ -80,7 +81,7 @@ static int shash_update_unaligned(struct shash_desc *desc, const u8 *data,
unsigned int unaligned_len = alignmask + 1 -
((unsigned long)data & alignmask);
u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)]
__attribute__ ((aligned));
__aligned_largest;
u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
int err;
@ -116,7 +117,7 @@ static int shash_final_unaligned(struct shash_desc *desc, u8 *out)
struct shash_alg *shash = crypto_shash_alg(tfm);
unsigned int ds = crypto_shash_digestsize(tfm);
u8 ubuf[shash_align_buffer_size(ds, alignmask)]
__attribute__ ((aligned));
__aligned_largest;
u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
int err;
@ -403,7 +404,7 @@ static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg)
#endif
static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg)
{
struct shash_alg *salg = __crypto_shash_alg(alg);

3
crypto/skcipher.c
View File

@ -19,6 +19,7 @@
#include <crypto/scatterwalk.h>
#include <linux/bug.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/rtnetlink.h>
@ -807,7 +808,7 @@ static void crypto_skcipher_free_instance(struct crypto_instance *inst)
}
static void crypto_skcipher_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
__maybe_unused;
static void crypto_skcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
struct skcipher_alg *skcipher = container_of(alg, struct skcipher_alg,

1
include/linux/compiler-gcc.h
View File

@ -116,6 +116,7 @@
*/
#define __pure __attribute__((pure))
#define __aligned(x) __attribute__((aligned(x)))
#define __aligned_largest __attribute__((aligned))
#define __printf(a, b) __attribute__((format(printf, a, b)))
#define __scanf(a, b) __attribute__((format(scanf, a, b)))
#define __attribute_const__ __attribute__((__const__))