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Ricardo M. Correia
c2f997b0b3
When HAVE_MUTEX_OWNER and CONFIG_SMP are defined, kmutex_t is just a typedef for struct mutex. This is generally OK but has the downside that it can make mistakes such as mutex_lock(&kmutex_var) to pass by unnoticed until someone compiles the code without HAVE_MUTEX_OWNER or CONFIG_SMP (in which case kmutex_t is a real struct). Note that the correct API to call should have been mutex_enter() rather than mutex_lock(). We prevent these kind of mistakes by making kmutex_t a real structure with only one field. This makes kmutex_t typesafe and it shouldn't have any impact on the generated assembly code. Signed-off-by: Ricardo M. Correia <ricardo.correia@oracle.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>