pfm_alt_install_check 513 arch/ia64/kernel/perfmon.c static DEFINE_SPINLOCK(pfm_alt_install_check); pfm_alt_install_check 6385 arch/ia64/kernel/perfmon.c if (!spin_trylock(&pfm_alt_install_check)) { pfm_alt_install_check 6401 arch/ia64/kernel/perfmon.c spin_unlock(&pfm_alt_install_check); pfm_alt_install_check 6413 arch/ia64/kernel/perfmon.c spin_unlock(&pfm_alt_install_check); pfm_alt_install_check 6430 arch/ia64/kernel/perfmon.c if (!spin_trylock(&pfm_alt_install_check)) { pfm_alt_install_check 6442 arch/ia64/kernel/perfmon.c spin_unlock(&pfm_alt_install_check);