[PATCH 1/3] net: vxge: Use time_is_before_jiffies() for time comparison

[PATCH 1/3] net: vxge: Use time_is_before_jiffies() for time comparison

[Manuel Schölling]

To be future-proof and for better readability the time comparisons are modified
to use time_is_before_jiffies() instead of plain, error-prone math.

Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
---
 drivers/net/ethernet/neterion/vxge/vxge-main.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/neterion/vxge/vxge-main.c b/drivers/net/ethernet/neterion/vxge/vxge-main.c
index d107bcb..79f42db 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-main.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-main.c
@@ -2122,7 +2122,7 @@ static int vxge_open_vpaths(struct vxgedev *vdev)
 static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
 {
 	fifo->interrupt_count++;
-	if (jiffies > fifo->jiffies + HZ / 100) {
+	if (time_is_before_jiffies(fifo->jiffies + HZ / 100)) {
 		struct __vxge_hw_fifo *hw_fifo = fifo->handle;
 
 		fifo->jiffies = jiffies;
@@ -2150,7 +2150,7 @@ static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
 static void adaptive_coalesce_rx_interrupts(struct vxge_ring *ring)
 {
 	ring->interrupt_count++;
-	if (jiffies > ring->jiffies + HZ / 100) {
+	if (time_is_before_jiffies(ring->jiffies + HZ / 100)) {
 		struct __vxge_hw_ring *hw_ring = ring->handle;
 
 		ring->jiffies = jiffies;
-- 
1.7.10.4

(unknown),

[Manuel Schölling]

Sorry, contrary to the subject of the previous email, this is a single file patch.
Patches 2-3 do not exist

[PATCH] net: vxge: Use time_is_before_jiffies() for time comparison

[Manuel Schölling]

To be future-proof and for better readability the time comparisons are modified
to use time_is_before_jiffies() instead of plain, error-prone math.

Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
---
 drivers/net/ethernet/neterion/vxge/vxge-main.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/neterion/vxge/vxge-main.c b/drivers/net/ethernet/neterion/vxge/vxge-main.c
index d107bcb..79f42db 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-main.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-main.c
@@ -2122,7 +2122,7 @@ static int vxge_open_vpaths(struct vxgedev *vdev)
 static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
 {
 	fifo->interrupt_count++;
-	if (jiffies > fifo->jiffies + HZ / 100) {
+	if (time_is_before_jiffies(fifo->jiffies + HZ / 100)) {
 		struct __vxge_hw_fifo *hw_fifo = fifo->handle;
 
 		fifo->jiffies = jiffies;
@@ -2150,7 +2150,7 @@ static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
 static void adaptive_coalesce_rx_interrupts(struct vxge_ring *ring)
 {
 	ring->interrupt_count++;
-	if (jiffies > ring->jiffies + HZ / 100) {
+	if (time_is_before_jiffies(ring->jiffies + HZ / 100)) {
 		struct __vxge_hw_ring *hw_ring = ring->handle;
 
 		ring->jiffies = jiffies;
-- 
1.7.10.4

Re: [PATCH 1/3] net: vxge: Use time_is_before_jiffies() for time comparison

[Manuel Schoelling]

Sorry, contrary to the subject of this mail, this is a single file
patch.
Patches 2-3 do not exist.

On Mo, 2014-05-19 at 18:47 +0200, Manuel Schölling wrote:
> To be future-proof and for better readability the time comparisons are modified
> to use time_is_before_jiffies() instead of plain, error-prone math.
> 
> Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
> ---
>  drivers/net/ethernet/neterion/vxge/vxge-main.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/neterion/vxge/vxge-main.c b/drivers/net/ethernet/neterion/vxge/vxge-main.c
> index d107bcb..79f42db 100644
> --- a/drivers/net/ethernet/neterion/vxge/vxge-main.c
> +++ b/drivers/net/ethernet/neterion/vxge/vxge-main.c
> @@ -2122,7 +2122,7 @@ static int vxge_open_vpaths(struct vxgedev *vdev)
>  static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
>  {
>  	fifo->interrupt_count++;
> -	if (jiffies > fifo->jiffies + HZ / 100) {
> +	if (time_is_before_jiffies(fifo->jiffies + HZ / 100)) {
>  		struct __vxge_hw_fifo *hw_fifo = fifo->handle;
>  
>  		fifo->jiffies = jiffies;
> @@ -2150,7 +2150,7 @@ static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
>  static void adaptive_coalesce_rx_interrupts(struct vxge_ring *ring)
>  {
>  	ring->interrupt_count++;
> -	if (jiffies > ring->jiffies + HZ / 100) {
> +	if (time_is_before_jiffies(ring->jiffies + HZ / 100)) {
>  		struct __vxge_hw_ring *hw_ring = ring->handle;
>  
>  		ring->jiffies = jiffies;

Re: [PATCH] net: vxge: Use time_is_before_jiffies() for time comparison

[Joe Perches]

On Mon, 2014-05-19 at 18:51 +0200, Manuel Schölling wrote:
> To be future-proof and for better readability the time comparisons are modified
> to use time_is_before_jiffies() instead of plain, error-prone math.

Hi again Manuel.

Just a couple of FYIs/nits:

The "net: " prefix in your patch subject is a little
misleading.  One reading might be that the patch is
to the net/ subsystem but it's for a driver.

It might be better as:

[PATCH] vxge: Use time_is_before_jiffies

Generally, just use the last directory name
for the subject prefix.

ie:  patching: foo/bar/baz/qux.c

subject prefix is generally:

[PATCH] baz: whatever changed...

and a single patch to a number of different files
in foo/bar/baz/*.[ch] is still

[PATCH] baz: etc...

Also, the time_is_(before|after)_jiffies variants
are not used particularly often in the kernel.

The form using of time_<foo>(jiffies, ...)
is used _far_ more often (and it saves a little
typing too).

time_before(<foo>, jiffies)
time_is_before_jiffies(<foo>)

$ git grep -E -w "time_is_(before|after|before_eq|after_eq)_jiffies" | wc -l
93
$ git grep -E "\btime_(before|after|before_eq|after_eq)+\s*\(.*jiffies" | wc -l
1695

<shrug>  Maybe there's some reading clarity using
the time_is_(before|after)_jiffies variants.


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[PATCH v3] vxge: Use time_before()

[Manuel Schölling]

Thanks for your hints. I tried to incorporate your points into this new version.

[PATCH] vxge: Use time_before()

[Manuel Schölling]

To be future-proof and for better readability the time comparisons are modified
to use time_before() instead of plain, error-prone math.

Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
---
 drivers/net/ethernet/neterion/vxge/vxge-main.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/neterion/vxge/vxge-main.c b/drivers/net/ethernet/neterion/vxge/vxge-main.c
index d107bcb..7a0dead 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-main.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-main.c
@@ -2122,7 +2122,7 @@ static int vxge_open_vpaths(struct vxgedev *vdev)
 static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
 {
 	fifo->interrupt_count++;
-	if (jiffies > fifo->jiffies + HZ / 100) {
+	if (time_before(fifo->jiffies + HZ / 100, jiffies)) {
 		struct __vxge_hw_fifo *hw_fifo = fifo->handle;
 
 		fifo->jiffies = jiffies;
@@ -2150,7 +2150,7 @@ static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
 static void adaptive_coalesce_rx_interrupts(struct vxge_ring *ring)
 {
 	ring->interrupt_count++;
-	if (jiffies > ring->jiffies + HZ / 100) {
+	if (time_before(ring->jiffies + HZ / 100, jiffies)) {
 		struct __vxge_hw_ring *hw_ring = ring->handle;
 
 		ring->jiffies = jiffies;
-- 
1.7.10.4

Re: [PATCH] vxge: Use time_before()

[David Miller]

From: Manuel Schölling <manuel.schoelling@gmx.de>
Date: Mon, 19 May 2014 22:59:04 +0200

> To be future-proof and for better readability the time comparisons are modified
> to use time_before() instead of plain, error-prone math.
> 
> Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>

Applied, thanks.