[PATCH] staging: lustre: lnet: remove dead code

[PATCH] staging: lustre: lnet: remove dead code

[Dmitriy Cherkasov]

Remove code which was permanently disabled with ifdefs.

This also resolves the following checkpatch warning which was
triggered by the dead code:

WARNING: space prohibited before semicolon

Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>
---
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
index 5540de6..7c487fa 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
@@ -521,13 +521,7 @@ struct ksock_proto {
 
 static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
 {
-#if 1
 	return crc32_le(crc, p, len);
-#else
-	while (len-- > 0)
-		crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
-	return crc;
-#endif
 }
 
 static inline int
-- 
1.9.1

Re: [PATCH] staging: lustre: lnet: remove dead code

[Greg Kroah-Hartman]

On Wed, Jun 28, 2017 at 09:42:36PM -0700, Dmitriy Cherkasov wrote:
> Remove code which was permanently disabled with ifdefs.
> 
> This also resolves the following checkpatch warning which was
> triggered by the dead code:
> 
> WARNING: space prohibited before semicolon
> 
> Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>
> ---
>  drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> index 5540de6..7c487fa 100644
> --- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> +++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> @@ -521,13 +521,7 @@ struct ksock_proto {
>  
>  static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
>  {
> -#if 1
>  	return crc32_le(crc, p, len);

Even better yet, why not just replace the callers of this tiny function,
with crc32_le() instead and delete this useless wrapper?

thanks,

greg k-h

[PATCH v2] staging: lustre: lnet: remove dead code and crc32_le() wrapper

[Dmitriy Cherkasov]

After removing code which was premanently disabled with ifdefs, the
function ksocknal_csum() becomes just a wrapper for crc32_le(). Remove
this useless wrapper and instead call crc32_le() directly.

This also resolves the following checkpatch warning which was
triggered by the dead code:

WARNING: space prohibited before semicolon

Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>
---
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h     | 11 -----------
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c | 10 +++++-----
 2 files changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
index 5540de6..9eb169d 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
@@ -519,17 +519,6 @@ struct ksock_proto {
 #define CPU_MASK_NONE   0UL
 #endif
 
-static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
-{
-#if 1
-	return crc32_le(crc, p, len);
-#else
-	while (len-- > 0)
-		crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
-	return crc;
-#endif
-}
-
 static inline int
 ksocknal_route_mask(void)
 {
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
index 8a036f4..a3735da 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
@@ -201,7 +201,7 @@
 			if (fragnob > sum)
 				fragnob = sum;
 
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
+			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
 							   iov[i].iov_base,
 							   fragnob);
 		}
@@ -243,7 +243,7 @@
 			if (fragnob > sum)
 				fragnob = sum;
 
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
+			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
 							   base, fragnob);
 
 			kunmap(kiov[i].bv_page);
@@ -265,7 +265,7 @@
 
 	tx->tx_msg.ksm_csum = 0;
 
-	csum = ksocknal_csum(~0, tx->tx_iov[0].iov_base,
+	csum = crc32_le(~0, tx->tx_iov[0].iov_base,
 			     tx->tx_iov[0].iov_len);
 
 	if (tx->tx_kiov) {
@@ -273,13 +273,13 @@
 			base = kmap(tx->tx_kiov[i].bv_page) +
 			       tx->tx_kiov[i].bv_offset;
 
-			csum = ksocknal_csum(csum, base, tx->tx_kiov[i].bv_len);
+			csum = crc32_le(csum, base, tx->tx_kiov[i].bv_len);
 
 			kunmap(tx->tx_kiov[i].bv_page);
 		}
 	} else {
 		for (i = 1; i < tx->tx_niov; i++)
-			csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
+			csum = crc32_le(csum, tx->tx_iov[i].iov_base,
 					     tx->tx_iov[i].iov_len);
 	}
 
-- 
1.9.1

Re: [PATCH v2] staging: lustre: lnet: remove dead code and crc32_le() wrapper

[Joe Perches]

On Fri, 2017-06-30 at 03:29 +0000, Dmitriy Cherkasov wrote:
> After removing code which was premanently disabled with ifdefs, the
> function ksocknal_csum() becomes just a wrapper for crc32_le(). Remove
> this useless wrapper and instead call crc32_le() directly.
> 
> This also resolves the following checkpatch warning which was
> triggered by the dead code:
> 
> WARNING: space prohibited before semicolon

Please use checkpatch on your proposed patches before
sending them.

> diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
[]
> @@ -201,7 +201,7 @@
>  			if (fragnob > sum)
>  				fragnob = sum;
>  
> -			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
> +			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
>  							   iov[i].iov_base,
>  							   fragnob);

Please realign the subsequent lines to the open parenthesis.

>  		}
> @@ -243,7 +243,7 @@
>  			if (fragnob > sum)
>  				fragnob = sum;
>  
> -			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
> +			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
>  							   base, fragnob);

etc...

[PATCH v3] staging: lustre: lnet: remove dead code and crc32_le() wrapper

[Dmitriy Cherkasov]

After removing code which was premanently disabled with ifdefs, the
function ksocknal_csum() becomes just a wrapper for crc32_le(). Remove
this useless wrapper and instead call crc32_le() directly.

This also resolves the following checkpatch warning which was
triggered by the dead code:

WARNING: space prohibited before semicolon

Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>
---
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h     | 11 -----------
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c | 14 +++++++-------
 2 files changed, 7 insertions(+), 18 deletions(-)

diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
index 5540de6..9eb169d 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
@@ -519,17 +519,6 @@ struct ksock_proto {
 #define CPU_MASK_NONE   0UL
 #endif
 
-static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
-{
-#if 1
-	return crc32_le(crc, p, len);
-#else
-	while (len-- > 0)
-		crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
-	return crc;
-#endif
-}
-
 static inline int
 ksocknal_route_mask(void)
 {
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
index 8a036f4..5e7e4e1 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
@@ -201,7 +201,7 @@
 			if (fragnob > sum)
 				fragnob = sum;
 
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
+			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
 							   iov[i].iov_base,
 							   fragnob);
 		}
@@ -243,7 +243,7 @@
 			if (fragnob > sum)
 				fragnob = sum;
 
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
+			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
 							   base, fragnob);
 
 			kunmap(kiov[i].bv_page);
@@ -265,22 +265,22 @@
 
 	tx->tx_msg.ksm_csum = 0;
 
-	csum = ksocknal_csum(~0, tx->tx_iov[0].iov_base,
-			     tx->tx_iov[0].iov_len);
+	csum = crc32_le(~0, tx->tx_iov[0].iov_base,
+			tx->tx_iov[0].iov_len);
 
 	if (tx->tx_kiov) {
 		for (i = 0; i < tx->tx_nkiov; i++) {
 			base = kmap(tx->tx_kiov[i].bv_page) +
 			       tx->tx_kiov[i].bv_offset;
 
-			csum = ksocknal_csum(csum, base, tx->tx_kiov[i].bv_len);
+			csum = crc32_le(csum, base, tx->tx_kiov[i].bv_len);
 
 			kunmap(tx->tx_kiov[i].bv_page);
 		}
 	} else {
 		for (i = 1; i < tx->tx_niov; i++)
-			csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
-					     tx->tx_iov[i].iov_len);
+			csum = crc32_le(csum, tx->tx_iov[i].iov_base,
+					tx->tx_iov[i].iov_len);
 	}
 
 	if (*ksocknal_tunables.ksnd_inject_csum_error) {
-- 
1.9.1

Re: [PATCH v2] staging: lustre: lnet: remove dead code and crc32_le() wrapper

[Dmitriy Cherkasov]

On 06/30/2017, Joe Perches wrote:

> Please use checkpatch on your proposed patches before
> sending them.

Whoops! Sorry about that. Fixed and re-sent.

[PATCH v4] staging: lustre: lnet: remove dead code and crc32_le() wrapper

[Dmitriy Cherkasov]

After removing code which was permanently disabled with ifdefs, the
function ksocknal_csum() becomes just a wrapper for crc32_le(). Remove
this useless wrapper and instead call crc32_le() directly.

This also resolves the following checkpatch warning which was
triggered by the dead code:

WARNING: space prohibited before semicolon

Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>
---

Changes since v3:
	* fixed spacing issues
	* fixed typo in commit message

 drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h  | 11 -----------
 .../staging/lustre/lnet/klnds/socklnd/socklnd_lib.c  | 20 ++++++++++----------
 2 files changed, 10 insertions(+), 21 deletions(-)

diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
index 5540de6..9eb169d 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
@@ -519,17 +519,6 @@ struct ksock_proto {
 #define CPU_MASK_NONE   0UL
 #endif
 
-static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
-{
-#if 1
-	return crc32_le(crc, p, len);
-#else
-	while (len-- > 0)
-		crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
-	return crc;
-#endif
-}
-
 static inline int
 ksocknal_route_mask(void)
 {
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
index 8a036f4..41715cd 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
@@ -201,9 +201,9 @@
 			if (fragnob > sum)
 				fragnob = sum;
 
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
-							   iov[i].iov_base,
-							   fragnob);
+			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
+							iov[i].iov_base,
+							fragnob);
 		}
 		conn->ksnc_msg.ksm_csum = saved_csum;
 	}
@@ -243,8 +243,8 @@
 			if (fragnob > sum)
 				fragnob = sum;
 
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
-							   base, fragnob);
+			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
+							base, fragnob);
 
 			kunmap(kiov[i].bv_page);
 		}
@@ -265,22 +265,22 @@
 
 	tx->tx_msg.ksm_csum = 0;
 
-	csum = ksocknal_csum(~0, tx->tx_iov[0].iov_base,
-			     tx->tx_iov[0].iov_len);
+	csum = crc32_le(~0, tx->tx_iov[0].iov_base,
+			tx->tx_iov[0].iov_len);
 
 	if (tx->tx_kiov) {
 		for (i = 0; i < tx->tx_nkiov; i++) {
 			base = kmap(tx->tx_kiov[i].bv_page) +
 			       tx->tx_kiov[i].bv_offset;
 
-			csum = ksocknal_csum(csum, base, tx->tx_kiov[i].bv_len);
+			csum = crc32_le(csum, base, tx->tx_kiov[i].bv_len);
 
 			kunmap(tx->tx_kiov[i].bv_page);
 		}
 	} else {
 		for (i = 1; i < tx->tx_niov; i++)
-			csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
-					     tx->tx_iov[i].iov_len);
+			csum = crc32_le(csum, tx->tx_iov[i].iov_base,
+					tx->tx_iov[i].iov_len);
 	}
 
 	if (*ksocknal_tunables.ksnd_inject_csum_error) {
-- 
1.9.1

Re: [PATCH v3] staging: lustre: lnet: remove dead code and crc32_le() wrapper

[Greg Kroah-Hartman]

On Fri, Jun 30, 2017 at 03:52:46AM +0000, Dmitriy Cherkasov wrote:
> After removing code which was premanently disabled with ifdefs, the
> function ksocknal_csum() becomes just a wrapper for crc32_le(). Remove
> this useless wrapper and instead call crc32_le() directly.
> 
> This also resolves the following checkpatch warning which was
> triggered by the dead code:
> 
> WARNING: space prohibited before semicolon
> 
> Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>
> ---
>  drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h     | 11 -----------
>  drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c | 14 +++++++-------
>  2 files changed, 7 insertions(+), 18 deletions(-)

What changed from previous versions of this patch?  You need to put that
information below the --- line, as documented.

v4? :)

thanks,

greg k-h

Re: [PATCH v4] staging: lustre: lnet: remove dead code and crc32_le() wrapper

[Dmitriy Cherkasov]

On 06/29/2017 10:50 PM, Dmitriy Cherkasov wrote:
> After removing code which was permanently disabled with ifdefs, the
> function ksocknal_csum() becomes just a wrapper for crc32_le(). Remove
> this useless wrapper and instead call crc32_le() directly.
> 

Any feedback on v4 please?

[PATCH v5] staging: lustre: lnet: remove dead code and useless wrapper

[Dmitriy Cherkasov]

After removing commented out code, ksocknal_csum() becomes a useless 
wrapper for crc32_le(). Remove it, and instead call crc32_le() directly.

Fixes the following checkpatch warning:

WARNING: space prohibited before semicolon

Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>
---
v5:
	- fix incomplete patch changelog
	- improve code alignment
	- reword commit message and summary to be more concise
v4:
	- fix spacing issues
	- fix typo in commit message
	- add patch changelog
v3:
	- fix spacing and alignment issues 
	  (suggested by Joe Perches)
v2:
	- remove ksocknal_csum() and call crc32_le() directly
	  (suggested by Greg KH)
	- update commit message and summary to reflect these changes

 drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h  | 11 -----------
 .../staging/lustre/lnet/klnds/socklnd/socklnd_lib.c  | 20 ++++++++++----------
 2 files changed, 10 insertions(+), 21 deletions(-)

diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
index 5540de6..9eb169d 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
@@ -519,17 +519,6 @@ struct ksock_proto {
 #define CPU_MASK_NONE   0UL
 #endif
 
-static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
-{
-#if 1
-	return crc32_le(crc, p, len);
-#else
-	while (len-- > 0)
-		crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
-	return crc;
-#endif
-}
-
 static inline int
 ksocknal_route_mask(void)
 {
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
index 8a036f4..9c328dc 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
@@ -201,9 +201,9 @@
 			if (fragnob > sum)
 				fragnob = sum;
 
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
-							   iov[i].iov_base,
-							   fragnob);
+			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
+						      iov[i].iov_base,
+						      fragnob);
 		}
 		conn->ksnc_msg.ksm_csum = saved_csum;
 	}
@@ -243,8 +243,8 @@
 			if (fragnob > sum)
 				fragnob = sum;
 
-			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
-							   base, fragnob);
+			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
+						      base, fragnob);
 
 			kunmap(kiov[i].bv_page);
 		}
@@ -265,22 +265,22 @@
 
 	tx->tx_msg.ksm_csum = 0;
 
-	csum = ksocknal_csum(~0, tx->tx_iov[0].iov_base,
-			     tx->tx_iov[0].iov_len);
+	csum = crc32_le(~0, tx->tx_iov[0].iov_base,
+			tx->tx_iov[0].iov_len);
 
 	if (tx->tx_kiov) {
 		for (i = 0; i < tx->tx_nkiov; i++) {
 			base = kmap(tx->tx_kiov[i].bv_page) +
 			       tx->tx_kiov[i].bv_offset;
 
-			csum = ksocknal_csum(csum, base, tx->tx_kiov[i].bv_len);
+			csum = crc32_le(csum, base, tx->tx_kiov[i].bv_len);
 
 			kunmap(tx->tx_kiov[i].bv_page);
 		}
 	} else {
 		for (i = 1; i < tx->tx_niov; i++)
-			csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
-					     tx->tx_iov[i].iov_len);
+			csum = crc32_le(csum, tx->tx_iov[i].iov_base,
+					tx->tx_iov[i].iov_len);
 	}
 
 	if (*ksocknal_tunables.ksnd_inject_csum_error) {
-- 
1.9.1

Re: [PATCH v5] staging: lustre: lnet: remove dead code and useless wrapper

[Dilger, Andreas]

On Jul 7, 2017, at 16:03, Dmitriy Cherkasov <dmitriy@oss-tech.org> wrote:
> 
> After removing commented out code, ksocknal_csum() becomes a useless 
> wrapper for crc32_le(). Remove it, and instead call crc32_le() directly.
> 
> Fixes the following checkpatch warning:
> 
> WARNING: space prohibited before semicolon
> 
> Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>

Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>


> ---
> v5:
> 	- fix incomplete patch changelog
> 	- improve code alignment
> 	- reword commit message and summary to be more concise
> v4:
> 	- fix spacing issues
> 	- fix typo in commit message
> 	- add patch changelog
> v3:
> 	- fix spacing and alignment issues 
> 	  (suggested by Joe Perches)
> v2:
> 	- remove ksocknal_csum() and call crc32_le() directly
> 	  (suggested by Greg KH)
> 	- update commit message and summary to reflect these changes
> 
> drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h  | 11 -----------
> .../staging/lustre/lnet/klnds/socklnd/socklnd_lib.c  | 20 ++++++++++----------
> 2 files changed, 10 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> index 5540de6..9eb169d 100644
> --- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> +++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> @@ -519,17 +519,6 @@ struct ksock_proto {
> #define CPU_MASK_NONE   0UL
> #endif
> 
> -static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
> -{
> -#if 1
> -	return crc32_le(crc, p, len);
> -#else
> -	while (len-- > 0)
> -		crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
> -	return crc;
> -#endif
> -}
> -
> static inline int
> ksocknal_route_mask(void)
> {
> diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
> index 8a036f4..9c328dc 100644
> --- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
> +++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
> @@ -201,9 +201,9 @@
> 			if (fragnob > sum)
> 				fragnob = sum;
> 
> -			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
> -							   iov[i].iov_base,
> -							   fragnob);
> +			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
> +						      iov[i].iov_base,
> +						      fragnob);
> 		}
> 		conn->ksnc_msg.ksm_csum = saved_csum;
> 	}
> @@ -243,8 +243,8 @@
> 			if (fragnob > sum)
> 				fragnob = sum;
> 
> -			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
> -							   base, fragnob);
> +			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
> +						      base, fragnob);
> 
> 			kunmap(kiov[i].bv_page);
> 		}
> @@ -265,22 +265,22 @@
> 
> 	tx->tx_msg.ksm_csum = 0;
> 
> -	csum = ksocknal_csum(~0, tx->tx_iov[0].iov_base,
> -			     tx->tx_iov[0].iov_len);
> +	csum = crc32_le(~0, tx->tx_iov[0].iov_base,
> +			tx->tx_iov[0].iov_len);
> 
> 	if (tx->tx_kiov) {
> 		for (i = 0; i < tx->tx_nkiov; i++) {
> 			base = kmap(tx->tx_kiov[i].bv_page) +
> 			       tx->tx_kiov[i].bv_offset;
> 
> -			csum = ksocknal_csum(csum, base, tx->tx_kiov[i].bv_len);
> +			csum = crc32_le(csum, base, tx->tx_kiov[i].bv_len);
> 
> 			kunmap(tx->tx_kiov[i].bv_page);
> 		}
> 	} else {
> 		for (i = 1; i < tx->tx_niov; i++)
> -			csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
> -					     tx->tx_iov[i].iov_len);
> +			csum = crc32_le(csum, tx->tx_iov[i].iov_base,
> +					tx->tx_iov[i].iov_len);
> 	}
> 
> 	if (*ksocknal_tunables.ksnd_inject_csum_error) {
> -- 
> 1.9.1
> 

Cheers, Andreas
--
Andreas Dilger
Lustre Principal Architect
Intel Corporation

Re: [PATCH v5] staging: lustre: lnet: remove dead code and useless wrapper

[Dilger, Andreas]

On Jul 7, 2017, at 16:03, Dmitriy Cherkasov <dmitriy@oss-tech.org> wrote:
> 
> After removing commented out code, ksocknal_csum() becomes a useless 
> wrapper for crc32_le(). Remove it, and instead call crc32_le() directly.
> 
> Fixes the following checkpatch warning:
> 
> WARNING: space prohibited before semicolon
> 
> Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>

Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>


> ---
> v5:
> 	- fix incomplete patch changelog
> 	- improve code alignment
> 	- reword commit message and summary to be more concise
> v4:
> 	- fix spacing issues
> 	- fix typo in commit message
> 	- add patch changelog
> v3:
> 	- fix spacing and alignment issues 
> 	  (suggested by Joe Perches)
> v2:
> 	- remove ksocknal_csum() and call crc32_le() directly
> 	  (suggested by Greg KH)
> 	- update commit message and summary to reflect these changes
> 
> drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h  | 11 -----------
> .../staging/lustre/lnet/klnds/socklnd/socklnd_lib.c  | 20 ++++++++++----------
> 2 files changed, 10 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> index 5540de6..9eb169d 100644
> --- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> +++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
> @@ -519,17 +519,6 @@ struct ksock_proto {
> #define CPU_MASK_NONE   0UL
> #endif
> 
> -static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
> -{
> -#if 1
> -	return crc32_le(crc, p, len);
> -#else
> -	while (len-- > 0)
> -		crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
> -	return crc;
> -#endif
> -}
> -
> static inline int
> ksocknal_route_mask(void)
> {
> diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
> index 8a036f4..9c328dc 100644
> --- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
> +++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_lib.c
> @@ -201,9 +201,9 @@
> 			if (fragnob > sum)
> 				fragnob = sum;
> 
> -			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
> -							   iov[i].iov_base,
> -							   fragnob);
> +			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
> +						      iov[i].iov_base,
> +						      fragnob);
> 		}
> 		conn->ksnc_msg.ksm_csum = saved_csum;
> 	}
> @@ -243,8 +243,8 @@
> 			if (fragnob > sum)
> 				fragnob = sum;
> 
> -			conn->ksnc_rx_csum = ksocknal_csum(conn->ksnc_rx_csum,
> -							   base, fragnob);
> +			conn->ksnc_rx_csum = crc32_le(conn->ksnc_rx_csum,
> +						      base, fragnob);
> 
> 			kunmap(kiov[i].bv_page);
> 		}
> @@ -265,22 +265,22 @@
> 
> 	tx->tx_msg.ksm_csum = 0;
> 
> -	csum = ksocknal_csum(~0, tx->tx_iov[0].iov_base,
> -			     tx->tx_iov[0].iov_len);
> +	csum = crc32_le(~0, tx->tx_iov[0].iov_base,
> +			tx->tx_iov[0].iov_len);
> 
> 	if (tx->tx_kiov) {
> 		for (i = 0; i < tx->tx_nkiov; i++) {
> 			base = kmap(tx->tx_kiov[i].bv_page) +
> 			       tx->tx_kiov[i].bv_offset;
> 
> -			csum = ksocknal_csum(csum, base, tx->tx_kiov[i].bv_len);
> +			csum = crc32_le(csum, base, tx->tx_kiov[i].bv_len);
> 
> 			kunmap(tx->tx_kiov[i].bv_page);
> 		}
> 	} else {
> 		for (i = 1; i < tx->tx_niov; i++)
> -			csum = ksocknal_csum(csum, tx->tx_iov[i].iov_base,
> -					     tx->tx_iov[i].iov_len);
> +			csum = crc32_le(csum, tx->tx_iov[i].iov_base,
> +					tx->tx_iov[i].iov_len);
> 	}
> 
> 	if (*ksocknal_tunables.ksnd_inject_csum_error) {
> -- 
> 1.9.1
> 

Cheers, Andreas
--
Andreas Dilger
Lustre Principal Architect
Intel Corporation