On Tue, 09 Oct 2018 20:07:08 +0100, John Whitmore said: > #define alloc_ieee80211 alloc_ieee80211_rsl > > So what am I missing or why are a number of functions being redefined > as another name, which doesn't exist? There's areas in the kernel which use the preprocessor ## to glue stuff together. see include/asm-generic/atomic-long.h and ATOMIC_LONG_FETCH_OP for an example. It's also use in some code to generate function names to initialize a structure of function pointers. This can make grepping for a function name troublesome if you don't realize there's ## abuse going on to create a function name on the fly. However, in this particular case, it looks like they're redirecting an allocator so that for rtl8192u, when common/copypasted code calls alloc_ieee80211 it gets redirected to their own version... [/usr/src/linux-next] git grep alloc_ieee80211 drivers/staging/rtl8192u/ieee80211/ieee80211.h:#define alloc_ieee80211 alloc_ieee80211_rsl drivers/staging/rtl8192u/ieee80211/ieee80211.h: * allocated beyond this structure by alloc_ieee80211 drivers/staging/rtl8192u/ieee80211/ieee80211.h:struct net_device *alloc_ieee80211(int sizeof_priv); drivers/staging/rtl8192u/ieee80211/ieee80211_module.c:struct net_device *alloc_ieee80211(int sizeof_priv) drivers/staging/rtl8192u/r8192U_core.c: dev = alloc_ieee80211(sizeof(struct r8192_priv));
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