#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); ='emaclite-cleanup'>emaclite-cleanup</option> <option value='master' selected='selected'>master</option> <option value='nds-private-remove'>nds-private-remove</option> <option value='packet-loop-back'>packet-loop-back</option> <option value='packet-rx-pump-back'>packet-rx-pump-back</option> </select> <input type='submit' value='switch'/></form></td></tr> <tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table> <table class='tabs'><tr><td> <a href='/cgit.cgi/linux/net-next.git/'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?id=f35581d64e55fc65753a62957b3b98127d560d07'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa/pxa2xx-i2s.h'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/pxa/pxa2xx-i2s.h?id=f35581d64e55fc65753a62957b3b98127d560d07'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/pxa/pxa2xx-i2s.h?id=f35581d64e55fc65753a62957b3b98127d560d07'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/pxa/pxa2xx-i2s.h?id=f35581d64e55fc65753a62957b3b98127d560d07'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa/pxa2xx-i2s.h'> <input type='hidden' name='id' value='f35581d64e55fc65753a62957b3b98127d560d07'/><select name='qt'> <option value='grep'>log msg</option> <option value='author'>author</option> <option value='committer'>committer</option> <option value='range'>range</option> </select> <input class='txt' type='search' size='10' name='q' value=''/> <input type='submit' value='search'/> </form> </td></tr></table> <div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=f35581d64e55fc65753a62957b3b98127d560d07'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?id=f35581d64e55fc65753a62957b3b98127d560d07'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc?id=f35581d64e55fc65753a62957b3b98127d560d07'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa?id=f35581d64e55fc65753a62957b3b98127d560d07'>pxa</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa/pxa2xx-i2s.h?id=f35581d64e55fc65753a62957b3b98127d560d07'>pxa2xx-i2s.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa/pxa2xx-i2s.h?id=f35581d64e55fc65753a62957b3b98127d560d07&showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>