Messages in this thread | | | Date | Fri, 02 Nov 2001 11:09:49 +0100 | From | Giacomo Catenazzi <> | Subject | Re: [CHECKER] Is this a bug? |
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> > Also (in a separate patch at the end) is the removal of a whole bunch of: > > #ifdef IP2DEBUG_TRACE > ip2trace(foo); > #endif > > and replacing it with (the Linus-preferred, and far cleaner): > > #ifdef IP2DEBUG_TRACE > void ip2trace(foo) > #else > #define ip2trace(foo) do {} while (0) > #endif >
Why in Linux we use "do {} while (0)" instead of the standard "(void)0" ? (standard = as normal libc in <assert.h>)
do while(0) is used for multiple statment macro to avoid problem in if-else, not for empty instructions.
giacomo
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