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23 October 2021, 00:29:24 UTC
Revision 2f727f50f620f44f25ecb615767dc8611f64c988 authored by Linus Torvalds on 12 March 2014, 22:36:04 UTC, committed by Linus Torvalds on 12 March 2014, 22:36:04 UTC 
Merge tag 'sound-3.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
 
Pull sound fixes from Takashi Iwai:
 "A few fixes for ASoC (N810 DT init fix, DPCM error path fix and a
  couple of MFD init fixes), and a fix for a Lenovo laptop.  All small
  and trivial fixes, suitable for rc7"

* tag 'sound-3.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ASoC: 88pm860: Fix IO setup
  ASoC: si476x: Fix IO setup
  ALSA: hda - Fix loud click noise with IdeaPad 410Y
  ASoC: pcm: free path list before exiting from error conditions
  ASoC: n810: fix init with DT boot
2 parent s 33807f4 + 5e3a227
Raw File
Tip revision: 2f727f50f620f44f25ecb615767dc8611f64c988 authored by Linus Torvalds on 12 March 2014, 22:36:04 UTC
Merge tag 'sound-3.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Tip revision: 2f727f5
memweight.c 
#include <linux/export.h>
#include <linux/bug.h>
#include <linux/bitmap.h>

/**
 * memweight - count the total number of bits set in memory area
 * @ptr: pointer to the start of the area
 * @bytes: the size of the area
 */
size_t memweight(const void *ptr, size_t bytes)
{
	size_t ret = 0;
	size_t longs;
	const unsigned char *bitmap = ptr;

	for (; bytes > 0 && ((unsigned long)bitmap) % sizeof(long);
			bytes--, bitmap++)
		ret += hweight8(*bitmap);

	longs = bytes / sizeof(long);
	if (longs) {
		BUG_ON(longs >= INT_MAX / BITS_PER_LONG);
		ret += bitmap_weight((unsigned long *)bitmap,
				longs * BITS_PER_LONG);
		bytes -= longs * sizeof(long);
		bitmap += longs * sizeof(long);
	}
	/*
	 * The reason that this last loop is distinct from the preceding
	 * bitmap_weight() call is to compute 1-bits in the last region smaller
	 * than sizeof(long) properly on big-endian systems.
	 */
	for (; bytes > 0; bytes--, bitmap++)
		ret += hweight8(*bitmap);

	return ret;
}
EXPORT_SYMBOL(memweight);
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