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Message-Id: <1483144873-2932-1-git-send-email-gidisrael@gmail.com>
Date: Sat, 31 Dec 2016 06:11:13 +0530
From: gidisrael@...il.com
To: herbert@...dor.apana.org.au, davem@...emloft.net,
nhorman@...driver.com, akpm@...ux-foundation.org,
geert@...ux-m68k.org, joe@...ches.com, linux-kernel@...r.kernel.org
Cc: Gideon Israel Dsouza <gidisrael@...il.com>
Subject: [PATCH] This continues from this commit: 52f5684c8e1e ("kernel: use macros from compiler.h instead of __attribute__((...))")
From: Gideon Israel Dsouza <gidisrael@...il.com>
Very sorry about the previous broken patch. Here is an updated one.
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.
RFC: There are many places where __attribute((unused)) is used. There are
two macros for the exact same macro inside compiler-gcc.h:
__always_unused and __maybe_unused. I'm not sure which to have used to
replace instances inside /crypto. Should there perhaps be just an unused
macro. There are 1830 instances of __maybe_unused inside the kernel
code and 110 uses of__always_unused excluding my changes.
Signed-off-by: Gideon Israel Dsouza <gidisrael@...il.com>
---
crypto/ablkcipher.c | 5 +++--
crypto/acompress.c | 3 ++-
crypto/aead.c | 3 ++-
crypto/ahash.c | 3 ++-
crypto/akcipher.c | 3 ++-
crypto/blkcipher.c | 7 ++++---
crypto/cts.c | 5 +++--
crypto/kpp.c | 3 ++-
crypto/pcbc.c | 3 ++-
crypto/rng.c | 3 ++-
crypto/scompress.c | 3 ++-
crypto/shash.c | 9 +++++----
crypto/skcipher.c | 3 ++-
include/linux/compiler-gcc.h | 1 +
14 files changed, 34 insertions(+), 20 deletions(-)
diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index d676fc5..764aca2 100644
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -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));
+ __always_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));
+ __always_unused;
static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher;
diff --git a/crypto/acompress.c b/crypto/acompress.c
index 887783d..4cb3ad5 100644
--- a/crypto/acompress.c
+++ b/crypto/acompress.c
@@ -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));
+ __always_unused;
static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
{
diff --git a/crypto/aead.c b/crypto/aead.c
index 3f5c5ff..725d513 100644
--- a/crypto/aead.c
+++ b/crypto/aead.c
@@ -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));
+ __always_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);
diff --git a/crypto/ahash.c b/crypto/ahash.c
index 2ce8bcb..35b7871 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -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));
+ __always_unused;
static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
{
seq_printf(m, "type : ahash\n");
diff --git a/crypto/akcipher.c b/crypto/akcipher.c
index def301e..5443759 100644
--- a/crypto/akcipher.c
+++ b/crypto/akcipher.c
@@ -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));
+ __always_unused;
static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index a832426..f418366 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -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));
+ __always_unused;
static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
seq_printf(m, "type : blkcipher\n");
diff --git a/crypto/cts.c b/crypto/cts.c
index 00254d7..a1335d6 100644
--- a/crypto/cts.c
+++ b/crypto/cts.c
@@ -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;
diff --git a/crypto/kpp.c b/crypto/kpp.c
index d36ce05..2de95c4 100644
--- a/crypto/kpp.c
+++ b/crypto/kpp.c
@@ -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));
+ __always_unused;
static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
{
diff --git a/crypto/pcbc.c b/crypto/pcbc.c
index e4538e0..11d2486 100644
--- a/crypto/pcbc.c
+++ b/crypto/pcbc.c
@@ -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);
diff --git a/crypto/rng.c b/crypto/rng.c
index b81cffb..ac9ddd6 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -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));
+ __always_unused;
static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
{
seq_printf(m, "type : rng\n");
diff --git a/crypto/scompress.c b/crypto/scompress.c
index 35e396d..873ea88 100644
--- a/crypto/scompress.c
+++ b/crypto/scompress.c
@@ -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));
+ __always_unused;
static void crypto_scomp_show(struct seq_file *m, struct crypto_alg *alg)
{
diff --git a/crypto/shash.c b/crypto/shash.c
index a051541..9f277b3 100644
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -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));
+ __always_unused;
static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg)
{
struct shash_alg *salg = __crypto_shash_alg(alg);
diff --git a/crypto/skcipher.c b/crypto/skcipher.c
index 0e1e6c3..fd61a1f 100644
--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -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));
+ __always_unused;
static void crypto_skcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
struct skcipher_alg *skcipher = container_of(alg, struct skcipher_alg,
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 0444b13..fddd1a5 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -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__))
--
2.7.4
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