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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Kent Gibson <warthog618@gmail.com>,
	linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Linus Walleij <linus.walleij@linaro.org>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1 1/2] gpiolib: Split fastpath array to two
Date: Tue, 25 May 2021 21:35:17 +0300	[thread overview]
Message-ID: <20210525183518.63149-1-andriy.shevchenko@linux.intel.com> (raw)

Split fastpath array to two, i.e. for mask and for bits.
At the same time declare them as bitmaps.

This makes code better to read and gives a clue about use of
bitmap API.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/gpiolib.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 97a69362a584..79df075f8b82 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2540,21 +2540,24 @@ int gpiod_get_array_value_complex(bool raw, bool can_sleep,
 
 	while (i < array_size) {
 		struct gpio_chip *gc = desc_array[i]->gdev->chip;
-		unsigned long fastpath[2 * BITS_TO_LONGS(FASTPATH_NGPIO)];
+		DECLARE_BITMAP(fastpath_mask, FASTPATH_NGPIO);
+		DECLARE_BITMAP(fastpath_bits, FASTPATH_NGPIO);
 		unsigned long *mask, *bits;
 		int first, j;
 
 		if (likely(gc->ngpio <= FASTPATH_NGPIO)) {
-			mask = fastpath;
+			mask = fastpath_mask;
+			bits = fastpath_bits;
 		} else {
 			mask = kmalloc_array(2 * BITS_TO_LONGS(gc->ngpio),
 					   sizeof(*mask),
 					   can_sleep ? GFP_KERNEL : GFP_ATOMIC);
 			if (!mask)
 				return -ENOMEM;
+
+			bits = mask + BITS_TO_LONGS(gc->ngpio);
 		}
 
-		bits = mask + BITS_TO_LONGS(gc->ngpio);
 		bitmap_zero(mask, gc->ngpio);
 
 		if (!can_sleep)
@@ -2577,7 +2580,7 @@ int gpiod_get_array_value_complex(bool raw, bool can_sleep,
 
 		ret = gpio_chip_get_multiple(gc, mask, bits);
 		if (ret) {
-			if (mask != fastpath)
+			if (mask != fastpath_mask)
 				kfree(mask);
 			return ret;
 		}
@@ -2598,7 +2601,7 @@ int gpiod_get_array_value_complex(bool raw, bool can_sleep,
 						       j);
 		}
 
-		if (mask != fastpath)
+		if (mask != fastpath_mask)
 			kfree(mask);
 	}
 	return 0;
@@ -2823,21 +2826,24 @@ int gpiod_set_array_value_complex(bool raw, bool can_sleep,
 
 	while (i < array_size) {
 		struct gpio_chip *gc = desc_array[i]->gdev->chip;
-		unsigned long fastpath[2 * BITS_TO_LONGS(FASTPATH_NGPIO)];
+		DECLARE_BITMAP(fastpath_mask, FASTPATH_NGPIO);
+		DECLARE_BITMAP(fastpath_bits, FASTPATH_NGPIO);
 		unsigned long *mask, *bits;
 		int count = 0;
 
 		if (likely(gc->ngpio <= FASTPATH_NGPIO)) {
-			mask = fastpath;
+			mask = fastpath_mask;
+			bits = fastpath_bits;
 		} else {
 			mask = kmalloc_array(2 * BITS_TO_LONGS(gc->ngpio),
 					   sizeof(*mask),
 					   can_sleep ? GFP_KERNEL : GFP_ATOMIC);
 			if (!mask)
 				return -ENOMEM;
+
+			bits = mask + BITS_TO_LONGS(gc->ngpio);
 		}
 
-		bits = mask + BITS_TO_LONGS(gc->ngpio);
 		bitmap_zero(mask, gc->ngpio);
 
 		if (!can_sleep)
@@ -2882,7 +2888,7 @@ int gpiod_set_array_value_complex(bool raw, bool can_sleep,
 		if (count != 0)
 			gpio_chip_set_multiple(gc, mask, bits);
 
-		if (mask != fastpath)
+		if (mask != fastpath_mask)
 			kfree(mask);
 	}
 	return 0;
-- 
2.30.2


             reply	other threads:[~2021-05-25 18:35 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-25 18:35 Andy Shevchenko [this message]
2021-05-25 18:35 ` [PATCH v1 2/2] gpiolib: Switch to bitmap_alloc() Andy Shevchenko
2021-05-28  0:41   ` Linus Walleij
2021-05-28 14:15   ` Bartosz Golaszewski
2021-05-28  0:40 ` [PATCH v1 1/2] gpiolib: Split fastpath array to two Linus Walleij
2021-05-28 14:16 ` Bartosz Golaszewski

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