[IA64-SGI] sem2mutex ioc4.c
[IA64-SGI] sem2mutex ioc4.c

Convert to use a single mutex instead of two rwsems as this isn't
performance critical.

Signed-off-by: Jes Sorensen <e7bd830ae2d0c840ab7cd2131cd33ff38c069cbe@sgi.com>
Signed-off-by: Brent Casavant <eee61e0e41453a44afe867ce9a5b5e6cae5d61a8@sgi.com>
Signed-off-by: Tony Luck <e7984595ec0368ff920a7b3521dc7093683f6f26@intel.com>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas