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From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>,
	Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
	platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH v5 11/14] software node: move small properties inline when copying
Date: Thu, 17 Oct 2019 09:04:36 -0700
Message-ID: <20191017160436.GH35946@dtor-ws> (raw)
In-Reply-To: <20191011230721.206646-12-dmitry.torokhov@gmail.com>

On Fri, Oct 11, 2019 at 04:07:18PM -0700, Dmitry Torokhov wrote:
> When copying/duplicating set of properties, move smaller properties that
> were stored separately directly inside property entry structures. We can
> move:
> 
> - up to 8 bytes from U8 arrays
> - up to 4 words
> - up to 2 double words
> - one U64 value
> - one or 2 strings.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
>  drivers/base/swnode.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
> index ae4b24ee2a54..546fc1b20095 100644
> --- a/drivers/base/swnode.c
> +++ b/drivers/base/swnode.c
> @@ -277,6 +277,16 @@ static int property_entry_copy_data(struct property_entry *dst,
>  		dst->value = src->value;
>  	}
>  
> +	if (!dst->is_inline && dst->length <= sizeof(dst->value)) {
> +		/* We have an opportunity to move the data inline */
> +		const void *tmp = dst->pointer;
> +
> +		memcpy(&dst->value, tmp, dst->length);
> +		dst->is_inline = true;
> +
> +		kfree(tmp);
> +	}

This chunk needs to be moved to after dst->length is assigned.  I'll
send updated version after I get more feedback.

> +
>  	dst->length = src->length;
>  	dst->type = src->type;
>  	dst->name = kstrdup(src->name, GFP_KERNEL);

Thanks.

-- 
Dmitry

  parent reply index

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-11 23:07 [PATCH v5 00/14] software node: add support for reference properties Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 01/14] software node: remove DEV_PROP_MAX Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 02/14] software node: introduce PROPERTY_ENTRY_ARRAY_XXX_LEN() Dmitry Torokhov
2019-10-15 12:02   ` Andy Shevchenko
2019-10-11 23:07 ` [PATCH v5 03/14] efi/apple-properties: use PROPERTY_ENTRY_U8_ARRAY_LEN Dmitry Torokhov
2019-10-15 12:01   ` Andy Shevchenko
2019-10-15 18:02     ` Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 04/14] software node: mark internal macros with double underscores Dmitry Torokhov
2019-10-15 12:03   ` Andy Shevchenko
2019-10-15 18:09     ` Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 05/14] software node: clean up property_copy_string_array() Dmitry Torokhov
2019-10-15 12:07   ` Andy Shevchenko
2019-10-15 18:12     ` Dmitry Torokhov
2019-10-16  7:53       ` Andy Shevchenko
2019-10-16 17:00         ` Dmitry Torokhov
2019-10-17  7:02           ` Andy Shevchenko
2019-10-11 23:07 ` [PATCH v5 06/14] software node: get rid of property_set_pointer() Dmitry Torokhov
2019-10-15 12:09   ` Andy Shevchenko
2019-10-15 18:14     ` Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 07/14] software node: remove property_entry_read_uNN_array functions Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 08/14] software node: unify PROPERTY_ENTRY_XXX macros Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 09/14] software node: simplify property_entry_read_string_array() Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 10/14] software node: rename is_array to is_inline Dmitry Torokhov
2019-10-14  7:37   ` Andy Shevchenko
2019-10-15 18:22     ` Dmitry Torokhov
2019-10-16  7:59       ` Andy Shevchenko
2019-10-16 16:54         ` Dmitry Torokhov
2019-10-17  7:16           ` Andy Shevchenko
2019-10-17 16:00             ` Dmitry Torokhov
2019-10-17 16:02   ` Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 11/14] software node: move small properties inline when copying Dmitry Torokhov
2019-10-15 12:20   ` Andy Shevchenko
2019-10-15 18:25     ` Dmitry Torokhov
2019-10-16  7:48       ` Andy Shevchenko
2019-10-16 16:01         ` Dmitry Torokhov
2019-10-16 16:18           ` Andy Shevchenko
2019-10-16 16:23             ` Andy Shevchenko
2019-10-16 16:44               ` Dmitry Torokhov
2019-10-17 16:04   ` Dmitry Torokhov [this message]
2019-10-11 23:07 ` [PATCH v5 12/14] software node: implement reference properties Dmitry Torokhov
2019-10-11 23:07 ` [PATCH v5 13/14] platform/x86: intel_cht_int33fe: use inline " Dmitry Torokhov
2019-10-16  8:01   ` Andy Shevchenko
2019-10-11 23:07 ` [PATCH v5 14/14] software node: remove separate handling of references Dmitry Torokhov
2019-10-14  7:38 ` [PATCH v5 00/14] software node: add support for reference properties Andy Shevchenko
2019-10-14 23:57   ` Dmitry Torokhov
2019-10-16  8:02     ` Andy Shevchenko

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