Greg KH
gregk****@linux*****
2017年 8月 29日 (火) 15:30:15 JST
ForkOn Thu, Jul 06, 2017 at 09:34:18AM -0700, Babu Moger wrote:
> Resending the series per Greg KH's request.
>
> Found this problem while enabling queued rwlock on SPARC.
> The parameter CONFIG_CPU_BIG_ENDIAN is used to clear the
> specific byte in qrwlock structure. Without this parameter,
> we clear the wrong byte.
> Here is the code in include/asm-generic/qrwlock.h
>
> static inline u8 *__qrwlock_write_byte(struct qrwlock *lock)
> {
> return (u8 *)lock + 3 * IS_BUILTIN(CONFIG_CPU_BIG_ENDIAN);
> }
>
> Also found few more references of this parameter in
> drivers/of/base.c
> drivers/of/fdt.c
> drivers/tty/serial/earlycon.c
> drivers/tty/serial/serial_core.c
>
> Here is our previous discussion.
> https://lkml.org/lkml/2017/5/24/620
>
> Based on the discussion, it was decided to add CONFIG_CPU_BIG_ENDIAN
> for all the fixed big endian architecture(frv, h8300, m68k, openrisc,
> parisc and sparc). And warn if there are inconsistencies in this definition.
Did this series ever get picked up by anyone? I don't know whose tree
it should go through if not, anyone have any ideas? I guess I could,
but arch-specific stuff is odd...
thanks,
greg k-h