WANG Cong wrote:
For example, the defination of __devexit_p:
#if defined(MODULE) || defined(CONFIG_HOTPLUG)
#define __devexit_p(x) x
#else
#define __devexit_p(x) NULL
#endif
If !(defined(MODULE) || defined(CONFIG_HOTPLUG)), __devexit_p
is just a NULL pointer, thus 'x' may be unused although defined.
...and that's the purpose of the __devexit marker on the code itself.
Jeff
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