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
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index 05e804c..aec9a1b 100644
--- a/arch/powerpc/kernel/hw_breakpoint.c
+++ b/arch/powerpc/kernel/hw_breakpoint.c
@@ -109,8 +109,9 @@
* 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;
}
diff --git a/arch/powerpc/mm/hugetlbpage-book3e.c b/arch/powerpc/mm/hugetlbpage-book3e.c
index 7e6d088..83a8be7 100644
--- a/arch/powerpc/mm/hugetlbpage-book3e.c
+++ b/arch/powerpc/mm/hugetlbpage-book3e.c
@@ -8,6 +8,8 @@
#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)
@@ -60,6 +62,14 @@
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;"
@@ -80,6 +90,9 @@
{
struct paca_struct *paca = get_paca();
+ if (!cpu_has_feature(CPU_FTR_SMT))
+ return;
+
isync();
paca->tcd_ptr->lock = 0;
}
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 4c1903f..0c6c17a1 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -415,7 +415,7 @@
delta = mftb() - psl_tb;
if (delta < 0)
delta = -delta;
- } while (cputime_to_usecs(delta) > 16);
+ } while (tb_to_ns(delta) > 16000);
return 0;
}