On Thu, Jul 12, 2018 at 2:59 PM, Jordan Crouse wrote:
> Add a put function for the coredump printer to bypass printf()
> for constant strings for a speed boost.
s/put/puts/ (and in the $subject)
BR,
-R
>
> v2: Add EXPORT_SYMBOL for _drm_puts_coredump
> Signed-off-by: Jordan Crouse
> ---
> drivers/gpu/drm/drm_print.c | 43 +
> include/drm/drm_print.h | 2 ++
> 2 files changed, 45 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c
> index bef8f0ec5d73..ff20f4a764c8 100644
> --- a/drivers/gpu/drm/drm_print.c
> +++ b/drivers/gpu/drm/drm_print.c
> @@ -30,6 +30,49 @@
> #include
> #include
>
> +void __drm_puts_coredump(struct drm_printer *p, const char *str)
> +{
> + struct drm_print_iterator *iterator = p->arg;
> +
> + ssize_t len;
> +
> + if (!iterator->remain)
> + return;
> +
> + if (iterator->offset < iterator->start) {
> + ssize_t copy;
> +
> + len = strlen(str);
> +
> + if (iterator->offset + len <= iterator->start) {
> + iterator->offset += len;
> + return;
> + }
> +
> + copy = len - (iterator->start - iterator->offset);
> +
> + if (copy > iterator->remain)
> + copy = iterator->remain;
> +
> + /* Copy out the bit of the string that we need */
> + memcpy(iterator->data,
> + str + (iterator->start - iterator->offset), copy);
> +
> + iterator->offset = iterator->start + copy;
> + iterator->remain -= copy;
> + } else {
> + ssize_t pos = iterator->offset - iterator->start;
> +
> + len = min_t(ssize_t, strlen(str), iterator->remain);
> +
> + memcpy(iterator->data + pos, str, len);
> +
> + iterator->offset += len;
> + iterator->remain -= len;
> + }
> +}
> +EXPORT_SYMBOL(__drm_puts_coredump);
> +
> void __drm_printfn_coredump(struct drm_printer *p, struct va_format *vaf)
> {
> struct drm_print_iterator *iterator = p->arg;
> diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
> index 3bc6ba4b7b2c..2a903ee7b428 100644
> --- a/include/drm/drm_print.h
> +++ b/include/drm/drm_print.h
> @@ -75,6 +75,7 @@ struct drm_printer {
> };
>
> void __drm_printfn_coredump(struct drm_printer *p, struct va_format *vaf);
> +void __drm_puts_coredump(struct drm_printer *p, const char *str);
> void __drm_printfn_seq_file(struct drm_printer *p, struct va_format *vaf);
> void __drm_puts_seq_file(struct drm_printer *p, const char *str);
> void __drm_printfn_info(struct drm_printer *p, struct va_format *vaf);
> @@ -129,6 +130,7 @@ drm_coredump_printer(struct drm_print_iterator *iter)
> {
> struct drm_printer p = {
> .printfn = __drm_printfn_coredump,
> + .puts = __drm_puts_coredump,
> .arg = iter,
> };
> return p;
> --
> 2.17.1
>
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