Messages in this thread | | | Date | Sun, 8 Dec 2002 00:52:55 +0100 | From | "J.A. Magallon" <> | Subject | Re: [RFC][PATCH] net drivers and cache alignment |
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On 2002.12.08 Andrew Morton wrote: >"J.A. Magallon" wrote: >> >> #define __cacheline_start struct { } ____cacheline_aligned; > >That will generate a warning on faster^Wolder versions of gcc. > >mnm:/home/akpm> gcc t2.c >t2.c:11: warning: unnamed struct/union that defines no instances >t2.c:15: warning: unnamed struct/union that defines no instances >mnm:/home/akpm> gcc -v >Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/2.95.3/specs >gcc version 2.95.3 20010315 (release) >
And how 'bout this (do not have any gcc oldie available to test):
#define __cacheline_start union { int :0; } ____cacheline_aligned;
It passes gcc-3.2 -Wall... I think it's nicer to insert __c_s than to go field by field marking them...
-- J.A. Magallon <jamagallon@able.es> \ Software is like sex: werewolf.able.es \ It's better when it's free Mandrake Linux release 9.1 (Cooker) for i586 Linux 2.4.20-jam1 (gcc 3.2 (Mandrake Linux 9.1 3.2-4mdk)) - 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/
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