lkml.org 
[lkml]   [2015]   [May]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 18/98] include/uapi/sound/emu10k1.h: added EMU10K1 version of DECLARE_BITMAP etc macros
At Sun, 31 May 2015 09:18:57 +0200,
Takashi Iwai wrote:
>
> At Sat, 30 May 2015 17:38:10 +0200,
> Mikko Rapeli wrote:
> >
> > Fixes userspace compilation error:
> >
> > error: expected specifier-qualifier-list before ‘DECLARE_BITMAP’
> > DECLARE_BITMAP(gpr_valid, 0x200); /* bitmask of valid initializers */
> >
> > DECLARE_BITMAP etc macros are not meant for userspace headers and thus
> > added here as private copies for emu10k.h.
> >
> > Fix was suggested by Arnd Bergmann <arnd@arndb.de> in message
> > <2168807.4Yxh5gl11Q@wuerfel> on lkml.
> >
> > Signed-off-by: Mikko Rapeli <mikko.rapeli@iki.fi>
> > ---
> > include/uapi/sound/emu10k1.h | 23 ++++++++++++++++++++---
> > 1 file changed, 20 insertions(+), 3 deletions(-)
> >
> > diff --git a/include/uapi/sound/emu10k1.h b/include/uapi/sound/emu10k1.h
> > index ec1535b..7575f0f 100644
> > --- a/include/uapi/sound/emu10k1.h
> > +++ b/include/uapi/sound/emu10k1.h
> > @@ -34,6 +34,23 @@
> >
> > #define EMU10K1_FX8010_PCM_COUNT 8
> >
> > +/*
> > + * Following definitions are copies from kernel headers to support compiling
> > + * this header file in userspace. The definitions are not generally available
> > + * in uapi headers so the needed things are copied here wtih __EMU10k1 prefix.
> > + */
> > +
> > +/* From include/linux/bitops.h */
> > +#define __EMU10K1_BITS_PER_BYTE 8
> > +/* From include/linux/kernel.h */
> > +#define __EMU10K1_DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
> > +/* From include/linux/bitops.h */
> > +#define __EMU10K1_BITS_TO_LONGS(nr) \
> > + __EMU10K1_DIV_ROUND_UP(nr, __EMU10K1_BITS_PER_BYTE * sizeof(long))
> > +/* From include/linux/types.h */
> > +#define __EMU10K1_DECLARE_BITMAP(name,bits) \
> > + unsigned long name[__EMU10K1_BITS_TO_LONGS(bits)]
>
> This is way too complicated just for a few expansion of the aligned
> size arrays, IMO. Rather simplify it like below with a comment:
>
> /* the array must be aligned to unsigned long (i.e. 4 or 8 bytes) */
> #define __EMU10K1_DECLARE_BITMAP(name) \
> unsigned long name[(bits) / sizeof(unsigned long)]

Crap, of course, it must be multiplied with 8.

/* the array must be aligned to unsigned long (i.e. 32 or 64) */
#define __EMU10K1_DECLARE_BITMAP(name) \
unsigned long name[(bits) / (sizeof(unsigned long) * 8)]


Takashi


\
 
 \ /
  Last update: 2015-05-31 10:21    [W:0.121 / U:5.012 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site