lkml.org 
[lkml]   [2015]   [Feb]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v2 1/1] drivers/base: Remove unnecessary OOM message
From
On Mon, Feb 9, 2015 at 3:45 AM, Quentin Lambert
<lambert.quentin@gmail.com> wrote:
> This patch reduces the kernel size by removing error messages that duplicate
> the normal OOM message.
>
> A simplified version of the semantic patch that finds this problem is as
> follows: (http://coccinelle.lip6.fr)
>
> @@
> identifier f,print,l;
> expression e;
> constant char[] c;
> @@
>
> e = \(kzalloc\|kmalloc\|devm_kzalloc\|devm_kmalloc\)(...);
> if (e == NULL) {
> <+...
> - print(...,c,...);
> ... when any
> (
> goto l;
> |
> return ...;
> )
> ...+> }
>
> Signed-off-by: Quentin Lambert <lambert.quentin@gmail.com>
> ---
> This post http://lwn.net/Articles/627419/ points out that the messages
> will not be printed anyway. That being said it also explains that introducing
> a low-order memory-allocation failures would result in a better kernel.
> Although it is unlikely to change, I wasn't sure whether or not it should be
> mentionned in the commit message.
>
>
> drivers/base/firmware_class.c | 1 -
> drivers/base/power/clock_ops.c | 4 +---
> drivers/base/power/opp.c | 8 ++------

^^ for OPP:
Acked-by: Nishanth Menon <nm@ti.com>

> 3 files changed, 3 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
> index 58470c3..c3293f0 100644
> --- a/drivers/base/firmware_class.c
> +++ b/drivers/base/firmware_class.c
> @@ -855,7 +855,6 @@ fw_create_instance(struct firmware *firmware, const char *fw_name,
>
> fw_priv = kzalloc(sizeof(*fw_priv), GFP_KERNEL);
> if (!fw_priv) {
> - dev_err(device, "%s: kmalloc failed\n", __func__);
> fw_priv = ERR_PTR(-ENOMEM);
> goto exit;
> }
> diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
> index d626576..7fdd017 100644
> --- a/drivers/base/power/clock_ops.c
> +++ b/drivers/base/power/clock_ops.c
> @@ -81,10 +81,8 @@ static int __pm_clk_add(struct device *dev, const char *con_id,
> return -EINVAL;
>
> ce = kzalloc(sizeof(*ce), GFP_KERNEL);
> - if (!ce) {
> - dev_err(dev, "Not enough memory for clock entry.\n");
> + if (!ce)
> return -ENOMEM;
> - }
>
> if (con_id) {
> ce->con_id = kstrdup(con_id, GFP_KERNEL);
> diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
> index 15bf299..677fb28 100644
> --- a/drivers/base/power/opp.c
> +++ b/drivers/base/power/opp.c
> @@ -474,10 +474,8 @@ static int _opp_add_dynamic(struct device *dev, unsigned long freq,
>
> /* allocate new OPP node */
> new_opp = kzalloc(sizeof(*new_opp), GFP_KERNEL);
> - if (!new_opp) {
> - dev_warn(dev, "%s: Unable to create new OPP node\n", __func__);
> + if (!new_opp)
> return -ENOMEM;
> - }
>
> /* Hold our list modification lock here */
> mutex_lock(&dev_opp_list_lock);
> @@ -695,10 +693,8 @@ static int _opp_set_availability(struct device *dev, unsigned long freq,
>
> /* keep the node allocated */
> new_opp = kmalloc(sizeof(*new_opp), GFP_KERNEL);
> - if (!new_opp) {
> - dev_warn(dev, "%s: Unable to create OPP\n", __func__);
> + if (!new_opp)
> return -ENOMEM;
> - }
>
> mutex_lock(&dev_opp_list_lock);
>
> --
> 1.9.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-pm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html


--
---
Regards,
Nishanth Menon


\
 
 \ /
  Last update: 2015-02-09 16:01    [W:0.038 / U:7.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site