rework try_then_request_module to do less in non-modular kernels
This reworks try_then_request_module to only invoke the "lookup" function "x" once when the kernel is not modular. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -29,11 +29,12 @@
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/* modprobe exit status on success, -ve on error. Return value
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* usually useless though. */
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extern int request_module(const char * name, ...) __attribute__ ((format (printf, 1, 2)));
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#define try_then_request_module(x, mod...) ((x) ?: (request_module(mod), (x)))
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#else
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static inline int request_module(const char * name, ...) { return -ENOSYS; }
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#define try_then_request_module(x, mod...) (x)
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#endif
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#define try_then_request_module(x, mod...) ((x) ?: (request_module(mod), (x)))
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struct key;
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struct file;
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