Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

Pull powerpc fixes from Paul Mackerras:
 "Two small fixes for powerpc:
   - a fix for a regression since 3.2 that causes 4-second (or longer)
     pauses
   - a fix for a potential oops when loading kernel modules on 32-bit
     embedded systems."

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  powerpc: Fix kernel panic during kernel module load
  powerpc/time: Sanity check of decrementer expiration is necessary

2 files changed, 16 insertions, 9 deletions

diff --git a/arch/powerpc/kernel/module_32.c b/arch/powerpc/kernel/module_32.c
index 0b6d79617d7b..2e3200ca485f 100644
--- a/arch/powerpc/kernel/module_32.c
+++ b/arch/powerpc/kernel/module_32.c
@@ -176,8 +176,8 @@ int module_frob_arch_sections(Elf32_Ehdr *hdr,
 
 static inline int entry_matches(struct ppc_plt_entry *entry, Elf32_Addr val)
 {
-        if (entry->jump[0] == 0x3d600000 + ((val + 0x8000) >> 16)
-            && entry->jump[1] == 0x396b0000 + (val & 0xffff))
+        if (entry->jump[0] == 0x3d800000 + ((val + 0x8000) >> 16)
+            && entry->jump[1] == 0x398c0000 + (val & 0xffff))
                 return 1;
         return 0;
 }
@@ -204,10 +204,9 @@ static uint32_t do_plt_call(void *location,
                 entry++;
         }
 
-        /* Stolen from Paul Mackerras as well... */
-        entry->jump[0] = 0x3d600000+((val+0x8000)>>16); /* lis r11,sym@ha */
-        entry->jump[1] = 0x396b0000 + (val&0xffff);     /* addi r11,r11,sym@l*/
-        entry->jump[2] = 0x7d6903a6;                    /* mtctr r11 */
+        entry->jump[0] = 0x3d800000+((val+0x8000)>>16); /* lis r12,sym@ha */
+        entry->jump[1] = 0x398c0000 + (val&0xffff);     /* addi r12,r12,sym@l*/
+        entry->jump[2] = 0x7d8903a6;                    /* mtctr r12 */
         entry->jump[3] = 0x4e800420;                    /* bctr */
 
         DEBUGP("Initialized plt for 0x%x at %p\n", val, entry);
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 99a995c2a3f2..be171ee73bf8 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -475,6 +475,7 @@ void timer_interrupt(struct pt_regs * regs)
         struct pt_regs *old_regs;
         u64 *next_tb = &__get_cpu_var(decrementers_next_tb);
         struct clock_event_device *evt = &__get_cpu_var(decrementers);
+        u64 now;
 
         /* Ensure a positive value is written to the decrementer, or else
          * some CPUs will continue to take decrementer exceptions.
@@ -509,9 +510,16 @@ void timer_interrupt(struct pt_regs * regs)
                 irq_work_run();
         }
 
-        *next_tb = ~(u64)0;
-        if (evt->event_handler)
-                evt->event_handler(evt);
+        now = get_tb_or_rtc();
+        if (now >= *next_tb) {
+                *next_tb = ~(u64)0;
+                if (evt->event_handler)
+                        evt->event_handler(evt);
+        } else {
+                now = *next_tb - now;
+                if (now <= DECREMENTER_MAX)
+                        set_dec((int)now);
+        }
 
 #ifdef CONFIG_PPC64
         /* collect purr register values often, for accurate calculations */