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tc: less ugly check for bad sizeof(G)

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-02-10 06:28:09 +01:00
parent f133471302
commit 77350aa933
1 changed files with 4 additions and 6 deletions
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10
networking/tc.c
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@ -43,17 +43,15 @@ struct globals {
__u32 filter_proto; __u32 filter_proto;
} FIX_ALIASING; } FIX_ALIASING;
#define G (*(struct globals*)&bb_common_bufsiz1) #define G (*(struct globals*)&bb_common_bufsiz1)
struct BUG_G_too_big {
char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
};
#define filter_ifindex (G.filter_ifindex) #define filter_ifindex (G.filter_ifindex)
#define filter_qdisc (G.filter_qdisc) #define filter_qdisc (G.filter_qdisc)
#define filter_parent (G.filter_parent) #define filter_parent (G.filter_parent)
#define filter_prio (G.filter_prio) #define filter_prio (G.filter_prio)
#define filter_proto (G.filter_proto) #define filter_proto (G.filter_proto)
#define INIT_G() do { } while (0)
void BUG_tc_globals_too_big(void);
#define INIT_G() do { \
if (sizeof(G) > COMMON_BUFSIZE) \
BUG_tc_globals_too_big(); \
} while (0)
/* Allocates a buffer containing the name of a class id. /* Allocates a buffer containing the name of a class id.
* The caller must free the returned memory. */ * The caller must free the returned memory. */