The patch titled Subject: string: introduce memweight() has been removed from the -mm tree. Its filename was string-introduce-memweight.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Akinobu Mita <akinobu.mita@xxxxxxxxx> Subject: string: introduce memweight() memweight() is the function that counts the total number of bits set in memory area. Unlike bitmap_weight(), memweight() takes pointer and size in bytes to specify a memory area which does not need to be aligned to long-word boundary. [akpm@xxxxxxxxxxxxxxxxxxxx: rename `w' to `ret'] Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx> Cc: Anders Larsen <al@xxxxxxxxxxx> Cc: Alasdair Kergon <agk@xxxxxxxxxx> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Cc: Mark Fasheh <mfasheh@xxxxxxxx> Cc: Joel Becker <jlbec@xxxxxxxxxxxx> Cc: Jan Kara <jack@xxxxxxx> Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx> Cc: "Theodore Ts'o" <tytso@xxxxxxx> Cc: Matthew Wilcox <matthew@xxxxxx> Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/string.h | 3 +++ lib/Makefile | 2 +- lib/memweight.c | 38 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 42 insertions(+), 1 deletion(-) diff -puN include/linux/string.h~string-introduce-memweight include/linux/string.h --- a/include/linux/string.h~string-introduce-memweight +++ a/include/linux/string.h @@ -145,4 +145,7 @@ static inline bool strstarts(const char return strncmp(str, prefix, strlen(prefix)) == 0; } #endif + +extern size_t memweight(const void *ptr, size_t bytes); + #endif /* _LINUX_STRING_H_ */ diff -puN lib/Makefile~string-introduce-memweight lib/Makefile --- a/lib/Makefile~string-introduce-memweight +++ a/lib/Makefile @@ -22,7 +22,7 @@ lib-y += kobject.o klist.o obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \ bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \ string_helpers.o gcd.o lcm.o list_sort.o uuid.o flex_array.o \ - bsearch.o find_last_bit.o find_next_bit.o llist.o + bsearch.o find_last_bit.o find_next_bit.o llist.o memweight.o obj-y += kstrtox.o obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o diff -puN /dev/null lib/memweight.c --- /dev/null +++ a/lib/memweight.c @@ -0,0 +1,38 @@ +#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); _ Patches currently in -mm which might be from akinobu.mita@xxxxxxxxx are origin.patch fault-injection-fix-failcmdsh-warning.patch linux-next.patch ocfs2-use-find_last_bit.patch ocfs2-use-bitmap_weight.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html