Re: [patch] crypto: sha256-mb - cleanup a || vs | typo

[Tim Chen]

On Fri, Jul 01, 2016 at 12:13:30PM +0200, Ingo Molnar wrote:
> 
> * Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
---
 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