[PATCH] drivers/usb/gadget/udc/r8a66597-udc.c: Deinline pipe_change, save 2176 bytes

[PATCH] drivers/usb/gadget/udc/r8a66597-udc.c: Deinline pipe_change, save 2176 bytes

[Denys Vlasenko]

This function compiles to 298 bytes of machine code, has ~10 callsites.

This is a USB 2.0 device, USB 2.0 is limited to 35 MB/s, so should be almost never CPU bound.
No need to optimize for speed this agressively.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
CC: Felipe Balbi <balbi@ti.com>
CC: linux-usb@vger.kernel.org
CC: linux-kernel@vger.kernel.org
---
 drivers/usb/gadget/udc/r8a66597-udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/r8a66597-udc.c b/drivers/usb/gadget/udc/r8a66597-udc.c
index baa0609..1d79a47 100644
--- a/drivers/usb/gadget/udc/r8a66597-udc.c
+++ b/drivers/usb/gadget/udc/r8a66597-udc.c
@@ -296,7 +296,7 @@ static void r8a66597_change_curpipe(struct r8a66597 *r8a66597, u16 pipenum,
 	} while ((tmp & mask) != loop);
 }
 
-static inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
+static void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
 {
 	struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum];
 
-- 
2.1.0

Re: [PATCH] drivers/usb/gadget/udc/r8a66597-udc.c: Deinline pipe_change, save 2176 bytes

[Felipe Balbi]

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Hi,

Denys Vlasenko <dvlasenk@redhat.com> writes:
> This function compiles to 298 bytes of machine code, has ~10 callsites.

fair enough

> This is a USB 2.0 device, USB 2.0 is limited to 35 MB/s, so should be

it's not limited to 35MB/sec, sorry. USB 2.0 has a theoretical maximum
of 60MB/sec. But 44MB/sec is what people consider 'possible'. I've
gotten to 41MB/sec with g_mas_storage gadget.

> almost never CPU bound.
>
> No need to optimize for speed this agressively.
>
> Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
> CC: Felipe Balbi <balbi@ti.com>
> CC: linux-usb@vger.kernel.org
> CC: linux-kernel@vger.kernel.org
> ---
>  drivers/usb/gadget/udc/r8a66597-udc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/gadget/udc/r8a66597-udc.c b/drivers/usb/gadget/udc/r8a66597-udc.c
> index baa0609..1d79a47 100644
> --- a/drivers/usb/gadget/udc/r8a66597-udc.c
> +++ b/drivers/usb/gadget/udc/r8a66597-udc.c
> @@ -296,7 +296,7 @@ static void r8a66597_change_curpipe(struct r8a66597 *r8a66597, u16 pipenum,
>  	} while ((tmp & mask) != loop);
>  }
>  
> -static inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
> +static void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
>  {
>  	struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum];
>  
> -- 
> 2.1.0
>
> --
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-- 
balbi

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Re: [PATCH] drivers/usb/gadget/udc/r8a66597-udc.c: Deinline pipe_change, save 2176 bytes

[Felipe Balbi]

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Hi again,

Felipe Balbi <felipe.balbi@linux.intel.com> writes:
> Denys Vlasenko <dvlasenk@redhat.com> writes:
>> This function compiles to 298 bytes of machine code, has ~10 callsites.
>
> fair enough
>
>> This is a USB 2.0 device, USB 2.0 is limited to 35 MB/s, so should be
>
> it's not limited to 35MB/sec, sorry. USB 2.0 has a theoretical maximum
> of 60MB/sec. But 44MB/sec is what people consider 'possible'. I've
> gotten to 41MB/sec with g_mas_storage gadget.

also, you need to break you commit log lines at 72 characters. Please,
fix and resend

-- 
balbi

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