lkml.org 
[lkml]   [2006]   [Nov]   [25]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] Avoid truncating to 'long' in ALIGN() macro
FromRoland Dreier <>
DateSat, 25 Nov 2006 14:56:22 -0800
 > Perhaps a better way to fix this is to use
 > typeof() like other similar macros do.

I tried doing

#define ALIGN(x,a)				\
	({					\
		typeof(x) _a = (a);		\
		((x) + _a - 1) & ~(_a - 1);	\
	})
but that won't compile because of <net/neighbour.h>:

	unsigned char		ha[ALIGN(MAX_ADDR_LEN, sizeof(unsigned long))];

gcc says:

/scratch/Ksrc/linux-merge/include/net/neighbour.h:104: error: braced-group within expression allowed only inside a function

I guess that could be fixed by changing that declaration but now this
is starting to feel like early 2.6.20 material.

 - R.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-11-25 23:01    [from the cache]
©2003-2008