The patch titled Subject: lib: add weak __clzsi2()/__clzdi2() functions has been added to the -mm tree. Its filename is lib-add-weak-__clzsi2-__clzdi2-functions.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Chanho Min <chanho.min@xxxxxxx> Subject: lib: add weak __clzsi2()/__clzdi2() functions Some architectures need __clzsi2() or __clzdi2() for __builtin_clz and It causes build failure. They can be implemented using the fls() and overridden by linking arch-specific versions may not be implemented yet. Needed by the forthcoming lz4 decompressor patches. See https://lkml.org/lkml/2013/4/18/603 Signed-off-by: Chanho Min <chanho.min@xxxxxxx> Reported-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- lib/Makefile | 2 +- lib/clz.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+), 1 deletion(-) diff -puN lib/Makefile~lib-add-weak-__clzsi2-__clzdi2-functions lib/Makefile --- a/lib/Makefile~lib-add-weak-__clzsi2-__clzdi2-functions +++ a/lib/Makefile @@ -23,7 +23,7 @@ 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 \ - gcd.o lcm.o list_sort.o uuid.o flex_array.o \ + gcd.o lcm.o list_sort.o uuid.o flex_array.o clz.o\ bsearch.o find_last_bit.o find_next_bit.o llist.o memweight.o kfifo.o obj-y += string_helpers.o obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o diff -puN /dev/null lib/clz.c --- /dev/null +++ a/lib/clz.c @@ -0,0 +1,36 @@ +/* + * lib/clz.c + * + * Copyright (C) 2013 Chanho Min <chanho.min@xxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * __clzsi2/_clzdi2() can be overridden by linking arch-specific versions. + */ + +#include <linux/export.h> +#include <linux/kernel.h> + +int __weak __clzsi2(int val) +{ + return BITS_PER_LONG - fls(val); +} +EXPORT_SYMBOL(__clzsi2); + +#if BITS_PER_LONG == 32 +int __weak __clzdi2(long val) +{ + return BITS_PER_LONG - fls((int)val); +} +EXPORT_SYMBOL(__clzdi2); +#elif BITS_PER_LONG == 64 +int __weak __clzdi2i(long val) +{ + return BITS_PER_LONG - fls64((u64)val); +} +EXPORT_SYMBOL(__clzdi2); +#else +#error BITS_PER_LONG not 32 or 64 +#endif _ Patches currently in -mm which might be from chanho.min@xxxxxxx are origin.patch lib-add-weak-__clzsi2-__clzdi2-functions.patch lib-add-weak-__clzsi2-__clzdi2-functions-fix.patch lib-add-lz4-compressor-module.patch lib-add-lz4-compressor-module-fix.patch crypto-add-lz4-cryptographic-api.patch crypto-add-lz4-cryptographic-api-fix.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