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Message-ID: <20160708162803.GA29111@linux.intel.com>
Date: Fri, 8 Jul 2016 09:28:03 -0700
From: Tim Chen <tim.c.chen@...ux.intel.com>
To: Ingo Molnar <mingo@...nel.org>
Cc: Herbert Xu <herbert@...dor.apana.org.au>,
"H. Peter Anvin" <hpa@...or.com>,
Dan Carpenter <dan.carpenter@...cle.com>,
"David S. Miller" <davem@...emloft.net>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
Megha Dey <megha.dey@...el.com>,
"Wang, Rui Y" <rui.y.wang@...el.com>,
Denys Vlasenko <dvlasenk@...hat.com>,
Xiaodong Liu <xiaodong.liu@...el.com>,
linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
kernel-janitors@...r.kernel.org,
Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [patch] crypto: sha256-mb - cleanup a || vs | typo
On Fri, Jul 01, 2016 at 12:13:30PM +0200, Ingo Molnar wrote:
>
> * Herbert Xu <herbert@...dor.apana.org.au> wrote:
>
> > On Fri, Jul 01, 2016 at 09:55:59AM +0200, Ingo Molnar wrote:
> > >
> > > Plus:
> > >
> > > > > > /* Compute how many bytes to copy from user buffer into
> > > > > > * extra block
> > > > > > */
> > >
> > > please use the customary (multi-line) comment style:
> >
> > This is the customary comment style of the networking stack and
> > the crypto API. So please don't change it.
>
> Guys, do you even read your own code??
>
> That 'standard' is not being enforced consistently at all. Even in this very
> series there's an example of that weird comment not being followed:
>
> +++ b/arch/x86/crypto/sha1-mb/sha1_mb.c
> @@ -304,7 +304,7 @@ static struct sha1_hash_ctx *sha1_ctx_mgr_submit(struct sha1_ctx_mgr *mgr,
> /*
> * Compute how many bytes to copy from user buffer into
> * extra block
>
> See how this comment block uses the standard coding style, while the next patch
> has this weird coding style:
>
> - if ((ctx->partial_block_buffer_length) | (len < SHA256_BLOCK_SIZE)) {
> + if ((ctx->partial_block_buffer_length) || (len < SHA256_BLOCK_SIZE)) {
Sorry I was on vacation and didn't get to respond earlier.
Let's switch the above from | to || so the code logic is
clearer. Also clean up various multi-line comment style
inconsistencies in patch below.
Thanks.
Tim
---
From: Tim Chen <tim.c.chen@...ux.intel.com>
Subject: [PATCH] crypto: Cleanup sha multi-buffer code to use || instead of |
for condition comparison and cleanup multiline comment style
In sha*_ctx_mgr_submit, we currently use the | operator instead of ||
((ctx->partial_block_buffer_length) | (len < SHA1_BLOCK_SIZE))
Switching it to || and remove extraneous paranthesis to
adhere to coding style.
Also cleanup inconsistent multiline comment style.
Signed-off-by: Tim Chen <tim.c.chen@...ux.intel.com>
---
arch/x86/crypto/sha1-mb/sha1_mb.c | 2 +-
arch/x86/crypto/sha256-mb/sha256_mb.c | 11 +++++++----
arch/x86/crypto/sha512-mb/sha512_mb.c | 11 +++++++----
3 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/arch/x86/crypto/sha1-mb/sha1_mb.c b/arch/x86/crypto/sha1-mb/sha1_mb.c
index 561b286..9e5b671 100644
--- a/arch/x86/crypto/sha1-mb/sha1_mb.c
+++ b/arch/x86/crypto/sha1-mb/sha1_mb.c
@@ -304,7 +304,7 @@ static struct sha1_hash_ctx *sha1_ctx_mgr_submit(struct sha1_ctx_mgr *mgr,
* Or if the user's buffer contains less than a whole block,
* append as much as possible to the extra block.
*/
- if ((ctx->partial_block_buffer_length) | (len < SHA1_BLOCK_SIZE)) {
+ if (ctx->partial_block_buffer_length || len < SHA1_BLOCK_SIZE) {
/*
* Compute how many bytes to copy from user buffer into
* extra block
diff --git a/arch/x86/crypto/sha256-mb/sha256_mb.c b/arch/x86/crypto/sha256-mb/sha256_mb.c
index c9d5dcc..89fa85e 100644
--- a/arch/x86/crypto/sha256-mb/sha256_mb.c
+++ b/arch/x86/crypto/sha256-mb/sha256_mb.c
@@ -283,7 +283,8 @@ static struct sha256_hash_ctx *sha256_ctx_mgr_submit(struct sha256_ctx_mgr *mgr,
ctx->incoming_buffer = buffer;
ctx->incoming_buffer_length = len;
- /* Store the user's request flags and mark this ctx as currently
+ /*
+ * Store the user's request flags and mark this ctx as currently
* being processed.
*/
ctx->status = (flags & HASH_LAST) ?
@@ -299,8 +300,9 @@ static struct sha256_hash_ctx *sha256_ctx_mgr_submit(struct sha256_ctx_mgr *mgr,
* Or if the user's buffer contains less than a whole block,
* append as much as possible to the extra block.
*/
- if ((ctx->partial_block_buffer_length) | (len < SHA256_BLOCK_SIZE)) {
- /* Compute how many bytes to copy from user buffer into
+ if (ctx->partial_block_buffer_length || len < SHA256_BLOCK_SIZE) {
+ /*
+ * Compute how many bytes to copy from user buffer into
* extra block
*/
uint32_t copy_len = SHA256_BLOCK_SIZE -
@@ -323,7 +325,8 @@ static struct sha256_hash_ctx *sha256_ctx_mgr_submit(struct sha256_ctx_mgr *mgr,
/* The extra block should never contain more than 1 block */
assert(ctx->partial_block_buffer_length <= SHA256_BLOCK_SIZE);
- /* If the extra block buffer contains exactly 1 block,
+ /*
+ * If the extra block buffer contains exactly 1 block,
* it can be hashed.
*/
if (ctx->partial_block_buffer_length >= SHA256_BLOCK_SIZE) {
diff --git a/arch/x86/crypto/sha512-mb/sha512_mb.c b/arch/x86/crypto/sha512-mb/sha512_mb.c
index 676f0f2..f4cf5b7 100644
--- a/arch/x86/crypto/sha512-mb/sha512_mb.c
+++ b/arch/x86/crypto/sha512-mb/sha512_mb.c
@@ -253,7 +253,8 @@ static struct sha512_hash_ctx
int flags)
{
if (flags & (~HASH_ENTIRE)) {
- /* User should not pass anything other than FIRST, UPDATE, or
+ /*
+ * User should not pass anything other than FIRST, UPDATE, or
* LAST
*/
ctx->error = HASH_CTX_ERROR_INVALID_FLAGS;
@@ -284,7 +285,8 @@ static struct sha512_hash_ctx
ctx->partial_block_buffer_length = 0;
}
- /* If we made it here, there were no errors during this call to
+ /*
+ * If we made it here, there were no errors during this call to
* submit
*/
ctx->error = HASH_CTX_ERROR_NONE;
@@ -293,7 +295,8 @@ static struct sha512_hash_ctx
ctx->incoming_buffer = buffer;
ctx->incoming_buffer_length = len;
- /* Store the user's request flags and mark this ctx as currently being
+ /*
+ * Store the user's request flags and mark this ctx as currently being
* processed.
*/
ctx->status = (flags & HASH_LAST) ?
@@ -309,7 +312,7 @@ static struct sha512_hash_ctx
* Or if the user's buffer contains less than a whole block,
* append as much as possible to the extra block.
*/
- if ((ctx->partial_block_buffer_length) | (len < SHA512_BLOCK_SIZE)) {
+ if (ctx->partial_block_buffer_length || len < SHA512_BLOCK_SIZE) {
/* Compute how many bytes to copy from user buffer into extra
* block
*/
--
2.5.5
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