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* [PATCH] staging: unisys: visornic: Replace GFP_ATOMIC with GFP_KERNEL
@ 2019-05-22 17:05 Hariprasad Kelam
2019-05-23 7:17 ` Greg Kroah-Hartman
0 siblings, 1 reply; 2+ messages in thread
From: Hariprasad Kelam @ 2019-05-22 17:05 UTC (permalink / raw)
To: David Kershner, Greg Kroah-Hartman, Petr Machata, David Ahern,
David S. Miller, Jann Horn, Hariprasad Kelam, sparmaintainer,
devel, linux-kernel
As per below information
GFP_KERNEL FLAG
This is a normal allocation and might block. This is the flag to use in
process context code when it is safe to sleep.
GFP_ATOMIC FLAG
The allocation is high-priority and does not sleep. This is the flag to
use in interrupt handlers, bottom halves and other situations where you
cannot sleep
And we can take advantage of GFP_KERNEL , as when system is in low
memory chances of getting success is high compared to GFP_ATOMIC.
As visornic_probe is in process context we can use GPF_KERNEL.
Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
---
drivers/staging/unisys/visornic/visornic_main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/unisys/visornic/visornic_main.c b/drivers/staging/unisys/visornic/visornic_main.c
index 1c1a470..9d4f1da 100644
--- a/drivers/staging/unisys/visornic/visornic_main.c
+++ b/drivers/staging/unisys/visornic/visornic_main.c
@@ -1861,12 +1861,12 @@ static int visornic_probe(struct visor_device *dev)
skb_queue_head_init(&devdata->xmitbufhead);
/* create a cmdrsp we can use to post and unpost rcv buffers */
- devdata->cmdrsp_rcv = kmalloc(SIZEOF_CMDRSP, GFP_ATOMIC);
+ devdata->cmdrsp_rcv = kmalloc(SIZEOF_CMDRSP, GFP_KERNEL);
if (!devdata->cmdrsp_rcv) {
err = -ENOMEM;
goto cleanup_rcvbuf;
}
- devdata->xmit_cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_ATOMIC);
+ devdata->xmit_cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_KERNEL);
if (!devdata->xmit_cmdrsp) {
err = -ENOMEM;
goto cleanup_cmdrsp_rcv;
--
2.7.4
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] staging: unisys: visornic: Replace GFP_ATOMIC with GFP_KERNEL
2019-05-22 17:05 [PATCH] staging: unisys: visornic: Replace GFP_ATOMIC with GFP_KERNEL Hariprasad Kelam
@ 2019-05-23 7:17 ` Greg Kroah-Hartman
0 siblings, 0 replies; 2+ messages in thread
From: Greg Kroah-Hartman @ 2019-05-23 7:17 UTC (permalink / raw)
To: Hariprasad Kelam
Cc: David Kershner, Petr Machata, David Ahern, David S. Miller,
Jann Horn, sparmaintainer, devel, linux-kernel
On Wed, May 22, 2019 at 10:35:30PM +0530, Hariprasad Kelam wrote:
> As per below information
>
> GFP_KERNEL FLAG
>
> This is a normal allocation and might block. This is the flag to use in
> process context code when it is safe to sleep.
>
> GFP_ATOMIC FLAG
>
> The allocation is high-priority and does not sleep. This is the flag to
> use in interrupt handlers, bottom halves and other situations where you
> cannot sleep
>
> And we can take advantage of GFP_KERNEL , as when system is in low
> memory chances of getting success is high compared to GFP_ATOMIC.
>
> As visornic_probe is in process context we can use GPF_KERNEL.
Ah, nice catch! Will go queue this up now, thanks.
greg k-h
^ permalink raw reply [flat|nested] 2+ messages in thread
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2019-05-22 17:05 [PATCH] staging: unisys: visornic: Replace GFP_ATOMIC with GFP_KERNEL Hariprasad Kelam
2019-05-23 7:17 ` Greg Kroah-Hartman
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