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Message-ID: <1436535163.20619.216.camel@tiscali.nl>
Date: Fri, 10 Jul 2015 15:32:43 +0200
From: Paul Bolle <pebolle@...cali.nl>
To: Roy Pledge <Roy.Pledge@...escale.com>
Cc: linuxppc-dev@...ts.ozlabs.org, scottwood@...escale.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/11] soc/fsl: Introduce the DPAA BMan portal driver
On do, 2015-07-09 at 16:21 -0400, Roy Pledge wrote:
> --- a/drivers/soc/fsl/qbman/Kconfig
> +++ b/drivers/soc/fsl/qbman/Kconfig
> +config FSL_DPA_PIRQ_FAST
> + bool
> + default y
First used in 04/11.
> +config FSL_DPA_PIRQ_SLOW
> + bool
> + default y
> +
> +config FSL_DPA_PORTAL_SHARE
> + bool
> + default y
As in 02/11: these three symbols function as aliases for FSL_DPA. Why
are they needed?
> config FSL_BMAN
> tristate "BMan device management"
> default n
> help
> FSL DPAA BMan driver
>
> +config FSL_BMAN_PORTAL
> + tristate "BMan portal(s)"
> + default n
> + help
> + FSL BMan portal driver
> --- /dev/null
> +++ b/drivers/soc/fsl/qbman/bman_api.c
> +struct bman_portal {
> + [...]
> +#ifdef CONFIG_FSL_DPA_CAN_WAIT_SYNC
This check will always evaluate to true, right? (I'll only report this
once.)
> + struct bman_pool *rcri_owned; /* only 1 release WAIT_SYNC at
> a time */
> +#endif
> +#ifdef CONFIG_FSL_DPA_PORTAL_SHARE
Ditto.
> + raw_spinlock_t sharing_lock; /* only used if is_shared */
> + int is_shared;
> + struct bman_portal *sharing_redirect;
> +#endif
> + [...]
> +};
> +const struct bman_portal_config *bman_get_portal_config(void)
> +{
> + [...]
> +}
I couldn't find callers of this function.
> +EXPORT_SYMBOL(bman_get_portal_config);
Nor users of this export, obviously.
> +
> +u32 bman_irqsource_get(void)
> +{
> + [...]
> +}
Ditto.
> +EXPORT_SYMBOL(bman_irqsource_get);
Ditto.
> +int bman_p_irqsource_add(struct bman_portal *p, __maybe_unused u32 bits)
> +{
> + [...]
> +}
> +EXPORT_SYMBOL(bman_p_irqsource_add);
There seem to be no users of this export.
> +int bman_irqsource_add(__maybe_unused u32 bits)
> +{
> + [...]
> +}
Unused.
> +EXPORT_SYMBOL(bman_irqsource_add);
Ditto.
> +int bman_irqsource_remove(u32 bits)
> +{
> + [...]
> +}
Ditto.
> +EXPORT_SYMBOL(bman_irqsource_remove);
Ditto.
> +u32 bman_poll_slow(void)
> +{
> + [...]
> +}
Ditto.
> +EXPORT_SYMBOL(bman_poll_slow);
Ditto.
> +void bman_poll(void)
> +{
> + [...]
> +}
Ditto.
> +EXPORT_SYMBOL(bman_poll);
Ditto.
> +static inline struct bm_rcr_entry *try_rel_start(struct bman_portal **p,
> +#ifdef CONFIG_FSL_DPA_CAN_WAIT
Always true, right?
> + __maybe_unused struct bman_pool *pool,
> +#endif
> + __maybe_unused unsigned long *irqflags,
> + __maybe_unused u32 flags)
And this is a, well, novel way to declare a function.
> +{
> + [...]
> +}
> +int bman_flush_stockpile(struct bman_pool *pool, u32 flags)
> +{
> + [...]
> +}
Unused function.
> +EXPORT_SYMBOL(bman_flush_stockpile);
So unused export too.
> +#ifdef CONFIG_FSL_BMAN
> +u32 bman_query_free_buffers(struct bman_pool *pool)
> +{
> + return bm_pool_free_buffers(pool->params.bpid);
> +}
> +EXPORT_SYMBOL(bman_query_free_buffers);
> +
> +int bman_update_pool_thresholds(struct bman_pool *pool, const u32 *thresholds)
> +{
> + u32 bpid;
> +
> + bpid = bman_get_params(pool)->bpid;
> +
> + return bm_pool_set(bpid, thresholds);
> +}
> +EXPORT_SYMBOL(bman_update_pool_thresholds);
More of the same.
> +#endif
> --- /dev/null
> +++ b/drivers/soc/fsl/qbman/bman_portal.c
>
> +module_driver(bman_portal_driver,
> + bman_portal_driver_register, platform_driver_unregister);
No MODULE_LICENSE() here, nor in the other files that make up this
module. So loading this module will trigger a warning and taint the
kernel.
> --- /dev/null
> +++ b/drivers/soc/fsl/qbman/bman_utils.c
> +EXPORT_SYMBOL(bman_alloc_bpid_range);
Unused export.
> +EXPORT_SYMBOL(bman_release_bpid_range);
Ditto.
> +EXPORT_SYMBOL(bman_seed_bpid_range);
Ditto.
> +int bman_reserve_bpid_range(u32 bpid, u32 count)
> +{
> + return dpaa_resource_reserve(&bpalloc, bpid, count);
> +}
> +EXPORT_SYMBOL(bman_reserve_bpid_range);
Because bman_reserve_bpid() is unused, see below, this function and this
export are unused too.
> --- /dev/null
> +++ b/drivers/soc/fsl/qbman/dpaa_resource.c
>
> +#if defined(CONFIG_FSL_BMAN_PORTAL) || defined(CONFIG_FSL_BMAN_PORTAL_MODULE)
#if IS_ENABLED(CONFIG_FSL_BMAN_PORTAL)
> +#ifdef DPAA_RESOURCE_DEBUG
Never defined. So DUMP() is dead code.
> --- a/drivers/soc/fsl/qbman/dpaa_sys.h
> +++ b/drivers/soc/fsl/qbman/dpaa_sys.h
>
> +#define CONFIG_TRY_BETTER_MEMCPY
Please replace the CONFIG_ prefix with something else.
> +#ifdef CONFIG_TRY_BETTER_MEMCPY
This will always be true, right?
> [...]
> +#else
> +#define copy_words memcpy
> +#define copy_shorts memcpy
> +#define copy_bytes memcpy
> +#endif
> --- /dev/null
> +++ b/include/soc/fsl/bman.h
> +static inline int bman_reserve_bpid(u32 bpid)
> +{
> + return bman_reserve_bpid_range(bpid, 1);
> +}
Unused.
Thanks,
Paul Bolle
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