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4 Commits

Author SHA1 Message Date
Guenter Roeck
fb5d69a5cd csky: bitops: Remove duplicate __clear_bit define 
Building csky:allmodconfig results in the following build error.

In file included from ./include/linux/bitops.h:33,
                 from ./include/linux/log2.h:12,
                 from kernel/bounds.c:13:
./arch/csky/include/asm/bitops.h:77: error: "__clear_bit" redefined

Since commit 9248e52fec ("locking/atomic: simplify non-atomic wrappers"),
__clear_bit is defined in include/asm-generic/bitops/non-atomic.h,
and the define in the csky include file is no longer necessary or useful.
Remove it.

Fixes: 9248e52fec ("locking/atomic: simplify non-atomic wrappers")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guo Ren <guoren@kernel.org>
 2021-10-16 07:20:12 +08:00
Guo Ren
6607aa6f6b csky: Fixup compile error 
: error: C++ style comments are not allowed in ISO C90
 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
 ^
error: (this will be reported only once per input file)

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
 2021-02-27 22:04:14 +08:00
Matthew Wilcox
3fc2579e6f fls: change parameter to unsigned int 
When testing in userspace, UBSAN pointed out that shifting into the sign
bit is undefined behaviour.  It doesn't really make sense to ask for the
highest set bit of a negative value, so just turn the argument type into
an unsigned int.

Some architectures (eg ppc) already had it declared as an unsigned int,
so I don't expect too many problems.

Link: http://lkml.kernel.org/r/20181105221117.31828-1-willy@infradead.org
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2019-01-04 13:13:46 -08:00
Guo Ren
735ee005c3 csky: Misc headers 
This patch adds csky registers' definition, bitops, byteorder,
asm-offsets codes.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
 2018-10-26 00:54:26 +08:00