| Message ID | e08df764e7046178ada4ec066852c0ce65410373.1730547933.git.christophe.jaillet@wanadoo.fr (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | dmaengine: idxd: Remove a useless mutex | expand |
On 11/2/24 04:46, Christophe JAILLET wrote: > ida_alloc()/ida_free() don't need any mutex, so remove this one. > > It was introduced by commit e6fd6d7e5f0f ("dmaengine: idxd: add a device to > represent the file opened"). > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Fenghua Yu <fenghua.yu@intel.com> Thanks. -Fenghua > --- > See: > https://elixir.bootlin.com/linux/v6.11.2/source/lib/idr.c#L375 > https://elixir.bootlin.com/linux/v6.11.2/source/lib/idr.c#L484 > --- > drivers/dma/idxd/cdev.c | 5 ----- > 1 file changed, 5 deletions(-) > > diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c > index 57f1bf2ab20b..ff94ee892339 100644 > --- a/drivers/dma/idxd/cdev.c > +++ b/drivers/dma/idxd/cdev.c > @@ -28,7 +28,6 @@ struct idxd_cdev_context { > * global to avoid conflict file names. > */ > static DEFINE_IDA(file_ida); > -static DEFINE_MUTEX(ida_lock); > > /* > * ictx is an array based off of accelerator types. enum idxd_type > @@ -123,9 +122,7 @@ static void idxd_file_dev_release(struct device *dev) > struct idxd_device *idxd = wq->idxd; > int rc; > > - mutex_lock(&ida_lock); > ida_free(&file_ida, ctx->id); > - mutex_unlock(&ida_lock); > > /* Wait for in-flight operations to complete. */ > if (wq_shared(wq)) { > @@ -284,9 +281,7 @@ static int idxd_cdev_open(struct inode *inode, struct file *filp) > } > > idxd_cdev = wq->idxd_cdev; > - mutex_lock(&ida_lock); > ctx->id = ida_alloc(&file_ida, GFP_KERNEL); > - mutex_unlock(&ida_lock); > if (ctx->id < 0) { > dev_warn(dev, "ida alloc failure\n"); > goto failed_ida;
On 11/2/24 4:46 AM, Christophe JAILLET wrote: > ida_alloc()/ida_free() don't need any mutex, so remove this one. > > It was introduced by commit e6fd6d7e5f0f ("dmaengine: idxd: add a device to > represent the file opened"). > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Dave Jiang <dave.jiang@intel.com> > --- > See: > https://elixir.bootlin.com/linux/v6.11.2/source/lib/idr.c#L375 > https://elixir.bootlin.com/linux/v6.11.2/source/lib/idr.c#L484 > --- > drivers/dma/idxd/cdev.c | 5 ----- > 1 file changed, 5 deletions(-) > > diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c > index 57f1bf2ab20b..ff94ee892339 100644 > --- a/drivers/dma/idxd/cdev.c > +++ b/drivers/dma/idxd/cdev.c > @@ -28,7 +28,6 @@ struct idxd_cdev_context { > * global to avoid conflict file names. > */ > static DEFINE_IDA(file_ida); > -static DEFINE_MUTEX(ida_lock); > > /* > * ictx is an array based off of accelerator types. enum idxd_type > @@ -123,9 +122,7 @@ static void idxd_file_dev_release(struct device *dev) > struct idxd_device *idxd = wq->idxd; > int rc; > > - mutex_lock(&ida_lock); > ida_free(&file_ida, ctx->id); > - mutex_unlock(&ida_lock); > > /* Wait for in-flight operations to complete. */ > if (wq_shared(wq)) { > @@ -284,9 +281,7 @@ static int idxd_cdev_open(struct inode *inode, struct file *filp) > } > > idxd_cdev = wq->idxd_cdev; > - mutex_lock(&ida_lock); > ctx->id = ida_alloc(&file_ida, GFP_KERNEL); > - mutex_unlock(&ida_lock); > if (ctx->id < 0) { > dev_warn(dev, "ida alloc failure\n"); > goto failed_ida;
diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c index 57f1bf2ab20b..ff94ee892339 100644 --- a/drivers/dma/idxd/cdev.c +++ b/drivers/dma/idxd/cdev.c @@ -28,7 +28,6 @@ struct idxd_cdev_context { * global to avoid conflict file names. */ static DEFINE_IDA(file_ida); -static DEFINE_MUTEX(ida_lock); /* * ictx is an array based off of accelerator types. enum idxd_type @@ -123,9 +122,7 @@ static void idxd_file_dev_release(struct device *dev) struct idxd_device *idxd = wq->idxd; int rc; - mutex_lock(&ida_lock); ida_free(&file_ida, ctx->id); - mutex_unlock(&ida_lock); /* Wait for in-flight operations to complete. */ if (wq_shared(wq)) { @@ -284,9 +281,7 @@ static int idxd_cdev_open(struct inode *inode, struct file *filp) } idxd_cdev = wq->idxd_cdev; - mutex_lock(&ida_lock); ctx->id = ida_alloc(&file_ida, GFP_KERNEL); - mutex_unlock(&ida_lock); if (ctx->id < 0) { dev_warn(dev, "ida alloc failure\n"); goto failed_ida;
ida_alloc()/ida_free() don't need any mutex, so remove this one. It was introduced by commit e6fd6d7e5f0f ("dmaengine: idxd: add a device to represent the file opened"). Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> --- See: https://elixir.bootlin.com/linux/v6.11.2/source/lib/idr.c#L375 https://elixir.bootlin.com/linux/v6.11.2/source/lib/idr.c#L484 --- drivers/dma/idxd/cdev.c | 5 ----- 1 file changed, 5 deletions(-)