4 files changed, 20 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/cpu_setup_44x.S b/arch/powerpc/kernel/cpu_setup_44x.S
index 80cac984d85d..31c18b52affb 100644
--- a/arch/powerpc/kernel/cpu_setup_44x.S
+++ b/arch/powerpc/kernel/cpu_setup_44x.S
@@ -34,7 +34,12 @@ _GLOBAL(__setup_cpu_440grx)
         blr
 _GLOBAL(__setup_cpu_460ex)
 _GLOBAL(__setup_cpu_460gt)
-        b       __init_fpu_44x
+        mflr    r4
+        bl      __init_fpu_44x
+        bl      __fixup_440A_mcheck
+        mtlr    r4
+        blr
+
 _GLOBAL(__setup_cpu_440gx)
 _GLOBAL(__setup_cpu_440spe)
         b       __fixup_440A_mcheck
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index e6d52845854f..e0bcf9354286 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -57,12 +57,18 @@ system_call_common:
         beq-    1f
         ld      r1,PACAKSAVE(r13)
 1:      std     r10,0(r1)
-        crclr   so
         std     r11,_NIP(r1)
         std     r12,_MSR(r1)
         std     r0,GPR0(r1)
         std     r10,GPR1(r1)
         ACCOUNT_CPU_USER_ENTRY(r10, r11)
+        /*
+         * This "crclr so" clears CR0.SO, which is the error indication on
+         * return from this system call.  There must be no cmp instruction
+         * between it and the "mfcr r9" below, otherwise if XER.SO is set,
+         * CR0.SO will get set, causing all system calls to appear to fail.
+         */
+        crclr   so
         std     r2,GPR2(r1)
         std     r3,GPR3(r1)
         std     r4,GPR4(r1)
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index bc1fb27368af..a11d68976dc8 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -250,8 +250,11 @@ int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
          * parsing
          */
         dn = pci_device_to_OF_node(pdev);
-        if (dn)
-                return of_irq_map_one(dn, 0, out_irq);
+        if (dn) {
+                rc = of_irq_map_one(dn, 0, out_irq);
+                if (!rc)
+                        return rc;
+        }
 
         /* Ok, we don't, time to have fun. Let's start by building up an
          * interrupt spec.  we assume #interrupt-cells is 1, which is standard
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 86a2ffccef25..20885a38237a 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -717,9 +717,11 @@ static void unregister_cpu_online(unsigned int cpu)
 
         BUG_ON(!c->hotpluggable);
 
+#ifdef CONFIG_PPC64
         if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
                         cpu_has_feature(CPU_FTR_SMT))
                 sysdev_remove_file(s, &attr_smt_snooze_delay);
+#endif
 
         /* PMC stuff */
         switch (cur_cpu_spec->pmc_type) {