* [PATCH -next] habanalabs: use GFP_ATOMIC under spin lock
@ 2019-02-22 5:46 Wei Yongjun
2019-02-22 7:04 ` Greg Kroah-Hartman
0 siblings, 1 reply; 4+ messages in thread
From: Wei Yongjun @ 2019-02-22 5:46 UTC (permalink / raw)
To: Oded Gabbay, Arnd Bergmann, Greg Kroah-Hartman, Omer Shpigelman
Cc: Wei Yongjun, linux-kernel, kernel-janitors
A spin lock is taken here so we should use GFP_ATOMIC.
Fixes: 0feaf86d4e69 ("habanalabs: add virtual memory and MMU modules")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
---
drivers/misc/habanalabs/memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/habanalabs/memory.c b/drivers/misc/habanalabs/memory.c
index 9236e52852c6..9e3491dc3b55 100644
--- a/drivers/misc/habanalabs/memory.c
+++ b/drivers/misc/habanalabs/memory.c
@@ -120,7 +120,7 @@ static int alloc_device_memory(struct hl_ctx *ctx, struct hl_mem_in *args,
spin_lock(&vm->idr_lock);
handle = idr_alloc(&vm->phys_pg_pack_handles, phys_pg_pack, 1, 0,
- GFP_KERNEL);
+ GFP_ATOMIC);
spin_unlock(&vm->idr_lock);
if (handle < 0) {
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH -next] habanalabs: use GFP_ATOMIC under spin lock
2019-02-22 5:46 [PATCH -next] habanalabs: use GFP_ATOMIC under spin lock Wei Yongjun
@ 2019-02-22 7:04 ` Greg Kroah-Hartman
2019-02-22 7:11 ` Oded Gabbay
0 siblings, 1 reply; 4+ messages in thread
From: Greg Kroah-Hartman @ 2019-02-22 7:04 UTC (permalink / raw)
To: Wei Yongjun
Cc: Oded Gabbay, Arnd Bergmann, Omer Shpigelman, linux-kernel,
kernel-janitors
On Fri, Feb 22, 2019 at 05:46:01AM +0000, Wei Yongjun wrote:
> A spin lock is taken here so we should use GFP_ATOMIC.
>
> Fixes: 0feaf86d4e69 ("habanalabs: add virtual memory and MMU modules")
> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
> ---
> drivers/misc/habanalabs/memory.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/misc/habanalabs/memory.c b/drivers/misc/habanalabs/memory.c
> index 9236e52852c6..9e3491dc3b55 100644
> --- a/drivers/misc/habanalabs/memory.c
> +++ b/drivers/misc/habanalabs/memory.c
> @@ -120,7 +120,7 @@ static int alloc_device_memory(struct hl_ctx *ctx, struct hl_mem_in *args,
>
> spin_lock(&vm->idr_lock);
> handle = idr_alloc(&vm->phys_pg_pack_handles, phys_pg_pack, 1, 0,
> - GFP_KERNEL);
> + GFP_ATOMIC);
> spin_unlock(&vm->idr_lock);
>
> if (handle < 0) {
>
>
>
Ah, nice catch!
Oded, any objection to me taking this patch?
greg k-h
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH -next] habanalabs: use GFP_ATOMIC under spin lock
2019-02-22 7:04 ` Greg Kroah-Hartman
@ 2019-02-22 7:11 ` Oded Gabbay
2019-02-22 7:44 ` Greg Kroah-Hartman
0 siblings, 1 reply; 4+ messages in thread
From: Oded Gabbay @ 2019-02-22 7:11 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: Wei Yongjun, Arnd Bergmann, Omer Shpigelman,
Linux-Kernel@Vger. Kernel. Org, kernel-janitors
On Fri, Feb 22, 2019 at 9:04 AM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Fri, Feb 22, 2019 at 05:46:01AM +0000, Wei Yongjun wrote:
> > A spin lock is taken here so we should use GFP_ATOMIC.
> >
> > Fixes: 0feaf86d4e69 ("habanalabs: add virtual memory and MMU modules")
> > Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
> > ---
> > drivers/misc/habanalabs/memory.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/misc/habanalabs/memory.c b/drivers/misc/habanalabs/memory.c
> > index 9236e52852c6..9e3491dc3b55 100644
> > --- a/drivers/misc/habanalabs/memory.c
> > +++ b/drivers/misc/habanalabs/memory.c
> > @@ -120,7 +120,7 @@ static int alloc_device_memory(struct hl_ctx *ctx, struct hl_mem_in *args,
> >
> > spin_lock(&vm->idr_lock);
> > handle = idr_alloc(&vm->phys_pg_pack_handles, phys_pg_pack, 1, 0,
> > - GFP_KERNEL);
> > + GFP_ATOMIC);
> > spin_unlock(&vm->idr_lock);
> >
> > if (handle < 0) {
> >
> >
> >
>
> Ah, nice catch!
>
> Oded, any objection to me taking this patch?
>
> greg k-h
No, of course not.
This patch is:
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH -next] habanalabs: use GFP_ATOMIC under spin lock
2019-02-22 7:11 ` Oded Gabbay
@ 2019-02-22 7:44 ` Greg Kroah-Hartman
0 siblings, 0 replies; 4+ messages in thread
From: Greg Kroah-Hartman @ 2019-02-22 7:44 UTC (permalink / raw)
To: Oded Gabbay
Cc: Wei Yongjun, Arnd Bergmann, Omer Shpigelman,
Linux-Kernel@Vger. Kernel. Org, kernel-janitors
On Fri, Feb 22, 2019 at 09:11:17AM +0200, Oded Gabbay wrote:
> On Fri, Feb 22, 2019 at 9:04 AM Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > On Fri, Feb 22, 2019 at 05:46:01AM +0000, Wei Yongjun wrote:
> > > A spin lock is taken here so we should use GFP_ATOMIC.
> > >
> > > Fixes: 0feaf86d4e69 ("habanalabs: add virtual memory and MMU modules")
> > > Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
> > > ---
> > > drivers/misc/habanalabs/memory.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/misc/habanalabs/memory.c b/drivers/misc/habanalabs/memory.c
> > > index 9236e52852c6..9e3491dc3b55 100644
> > > --- a/drivers/misc/habanalabs/memory.c
> > > +++ b/drivers/misc/habanalabs/memory.c
> > > @@ -120,7 +120,7 @@ static int alloc_device_memory(struct hl_ctx *ctx, struct hl_mem_in *args,
> > >
> > > spin_lock(&vm->idr_lock);
> > > handle = idr_alloc(&vm->phys_pg_pack_handles, phys_pg_pack, 1, 0,
> > > - GFP_KERNEL);
> > > + GFP_ATOMIC);
> > > spin_unlock(&vm->idr_lock);
> > >
> > > if (handle < 0) {
> > >
> > >
> > >
> >
> > Ah, nice catch!
> >
> > Oded, any objection to me taking this patch?
> >
> > greg k-h
> No, of course not.
> This patch is:
> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Great, will go queue it up now, thanks.
greg k-h
^ permalink raw reply [flat|nested] 4+ messages in thread
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2019-02-22 5:46 [PATCH -next] habanalabs: use GFP_ATOMIC under spin lock Wei Yongjun
2019-02-22 7:04 ` Greg Kroah-Hartman
2019-02-22 7:11 ` Oded Gabbay
2019-02-22 7:44 ` Greg Kroah-Hartman
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