Merge tag 'powerpc-4.5-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
- cxl: Fix PSL timebase synchronization detection from Frederic Barrat
- Fix oops when destroying hw_breakpoint event from Ravi Bangoria
- Avoid lbarx on e5500 from Scott Wood

* tag 'powerpc-4.5-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/fsl-book3e: Avoid lbarx on e5500
powerpc/hw_breakpoint: Fix oops when destroying hw_breakpoint event
cxl: Fix PSL timebase synchronization detection

arch/powerpc/kernel/hw_breakpoint.c

···
 	 * If the breakpoint is unregistered between a hw_breakpoint_handler()
 	 * and the single_step_dabr_instruction(), then cleanup the breakpoint
 	 * restoration variables to prevent dangling pointers.
+	 * FIXME, this should not be using bp->ctx at all! Sayeth peterz.
 	 */
-	if (bp->ctx && bp->ctx->task)
+	if (bp->ctx && bp->ctx->task && bp->ctx->task != ((void *)-1L))
 		bp->ctx->task->thread.last_hit_ubp = NULL;
 }
 

arch/powerpc/mm/hugetlbpage-book3e.c

···
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
 
+#include <asm/mmu.h>
+
 #ifdef CONFIG_PPC_FSL_BOOK3E
 #ifdef CONFIG_PPC64
 static inline int tlb1_next(void)
···
 	unsigned long tmp;
 	int token = smp_processor_id() + 1;
 
+	/*
+	 * Besides being unnecessary in the absence of SMT, this
+	 * check prevents trying to do lbarx/stbcx. on e5500 which
+	 * doesn't implement either feature.
+	 */
+	if (!cpu_has_feature(CPU_FTR_SMT))
+		return;
+
 	asm volatile("1: lbarx %0, 0, %1;"
 		     "cmpwi %0, 0;"
 		     "bne 2f;"
···
 static inline void book3e_tlb_unlock(void)
 {
 	struct paca_struct *paca = get_paca();
+
+	if (!cpu_has_feature(CPU_FTR_SMT))
+		return;
 
 	isync();
 	paca->tcd_ptr->lock = 0;

drivers/misc/cxl/pci.c

···
 		delta = mftb() - psl_tb;
 		if (delta < 0)
 			delta = -delta;
-	} while (cputime_to_usecs(delta) > 16);
+	} while (tb_to_ns(delta) > 16000);
 
 	return 0;
 }