MISRA.FUNC.UNUSEDPAR.2012

Unused parameters in functions.

MISRA C 2012 Rule 2.7: There should be no unused parameters in functions

Category: Advisory

Analysis: Decidable, Single Translation Unit

Applies to: C90, C99

Rationale

Most functions will be specified as using each of their parameters. If a function parameter is unused, it is possible that the implementation of the function does not match its specification. This rule highlights such potential mismatches.

Example

void withunusedpara ( uint1 6_t *para1,
                      int16_t unusedpara ) /* Non-compliant - unused */ 
{
  *para1 = 42U; 
}