Re: A question on printascii
thanks a lot Chris. Will try it out.
On Fri, Jul 20, 2012 at 9:24 AM, Chris Ball wrote:
> Hi Shashidhar,
>
> On Wed, Jul 18 2012, Shashidhar Hiremath wrote:
>> I want to use printascii to debug my serial driver. How do I enable
>> it and use the feature.
>> Currently I have enabled in menuconfig and done an extern on the
>> printascii api, this doesn't seem to work, So any hints for debugging
>> serial drivers ?
>
> Sounds like you want this patch, against linux-next:
>
> diff --git a/kernel/printk.c b/kernel/printk.c
> index 3991862..36abce8 100644
> --- a/kernel/printk.c
> +++ b/kernel/printk.c
> @@ -45,6 +45,8 @@
>
> #include
>
> +extern void printascii(char *);
> +
> #define CREATE_TRACE_POINTS
> #include
>
> @@ -1542,6 +1544,8 @@ asmlinkage int vprintk_emit(int facility, int level,
> */
> text_len = vscnprintf(text, sizeof(textbuf), fmt, args);
>
> + printascii(text);
> +
> /* mark and strip a trailing newline */
> if (text_len && text[text_len-1] == '\n') {
> text_len--;
>
> --
> Chris Ball
Re: A question on printascii
Hi Shashidhar,
On Wed, Jul 18 2012, Shashidhar Hiremath wrote:
> I want to use printascii to debug my serial driver. How do I enable
> it and use the feature.
> Currently I have enabled in menuconfig and done an extern on the
> printascii api, this doesn't seem to work, So any hints for debugging
> serial drivers ?
Sounds like you want this patch, against linux-next:
diff --git a/kernel/printk.c b/kernel/printk.c
index 3991862..36abce8 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -45,6 +45,8 @@
#include
+extern void printascii(char *);
+
#define CREATE_TRACE_POINTS
#include
@@ -1542,6 +1544,8 @@ asmlinkage int vprintk_emit(int facility, int level,
*/
text_len = vscnprintf(text, sizeof(textbuf), fmt, args);
+ printascii(text);
+
/* mark and strip a trailing newline */
if (text_len && text[text_len-1] == '\n') {
text_len--;
--
Chris Ball
Re: A question on printascii
I am working on ARM architecture. On Wed, Jul 18, 2012 at 9:33 PM, Randy Dunlap wrote: > On 07/18/2012 06:03 AM, Shashidhar Hiremath wrote: > >> HI, >> I want to use printascii to debug my serial driver. How do I enable >> it and use the feature. >> Currently I have enabled in menuconfig and done an extern on the >> printascii api, this doesn't seem to work, So any hints for debugging >> serial drivers ? >> > > > Enabled what/where in menuconfig? > > It looks like only a few CPU architecures or platforms > implement "printascii". What architecture/platform are you trying > to use it on? > > -- > ~Randy -- regards, Shashidhar Hiremath -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: A question on printascii
On 07/18/2012 06:03 AM, Shashidhar Hiremath wrote: > HI, > I want to use printascii to debug my serial driver. How do I enable > it and use the feature. > Currently I have enabled in menuconfig and done an extern on the > printascii api, this doesn't seem to work, So any hints for debugging > serial drivers ? > Enabled what/where in menuconfig? It looks like only a few CPU architecures or platforms implement "printascii". What architecture/platform are you trying to use it on? -- ~Randy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
A question on printascii
HI, I want to use printascii to debug my serial driver. How do I enable it and use the feature. Currently I have enabled in menuconfig and done an extern on the printascii api, this doesn't seem to work, So any hints for debugging serial drivers ? -- regards, Shashidhar Hiremath -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
