Messages in this thread | | | Date | Thu, 4 Nov 2010 10:52:51 +0800 | From | Américo Wang <> | Subject | Re: [2.6.37-rc1] /proc/vmstat failure. |
| |
On Thu, Nov 04, 2010 at 10:20:52AM +0800, Wu Fengguang wrote: >On Thu, Nov 04, 2010 at 05:54:48AM +0800, Tetsuo Handa wrote: >> Wu Fengguang wrote: >> > On Wed, Nov 03, 2010 at 07:11:11PM +0800, Tetsuo Handa wrote: >> > > Hello. >> > > >> > > "cat /proc/vmstat" triggered below failure. >> > > >> > > BUG: unable to handle kernel paging request at 07c06d16 >> > > IP: [<c050c336>] strnlen+0x6/0x20 >> > >> > It seems that m->private is of type (void *) while the original v is >> > (unsigned long *). Can be fixed by the following patch. >> >> Fixed by this patch. Thank you. > >Great, thanks! > >> By the way, GCC treats "(void *) + offset" as "(char *) + offset" >> but it is GCC specific extention. Maybe we should avoid such usage >> in order to avoid build failure for other compilers. > >"(void *) + offset" seems to be used quite often. > >I tried enable this gcc option, only to see huge amount of warnings. > > -Wpointer-arith > Warn about anything that depends on the "size of" a > function type or of "void". GNU C assigns these types a > size of 1, for convenience in calculations with "void *" > pointers and pointers to functions. >
Yup! I think it is good to have this.
>/cc/linux-next/scripts/mod/file2alias.c:88: warning: pointer of type ‘void *’ used in arithmetic ... >/cc/linux-next/scripts/mod/modpost.c:1565: warning: pointer of type ‘void *’ used in arithmetic >
No problem, this is from kbuild and most of them that I checked are actually fine, we can send patches to remove these warnings. -- 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/
| |