Merge /spare/repo/linux-2.6/

3 files changed, 26 insertions, 27 deletions

diff --git a/arch/ppc64/xmon/privinst.h b/arch/ppc64/xmon/privinst.h
index 183c3e400258..02eb40dac0b3 100644
--- a/arch/ppc64/xmon/privinst.h
+++ b/arch/ppc64/xmon/privinst.h
@@ -46,7 +46,6 @@ GSETSPR(287, pvr)
 GSETSPR(1008, hid0)
 GSETSPR(1009, hid1)
 GSETSPR(1010, iabr)
-GSETSPR(1013, dabr)
 GSETSPR(1023, pir)
 
 static inline void store_inst(void *p)
diff --git a/arch/ppc64/xmon/start.c b/arch/ppc64/xmon/start.c
index a9265bcc79b2..e50c158191e1 100644
--- a/arch/ppc64/xmon/start.c
+++ b/arch/ppc64/xmon/start.c
@@ -27,7 +27,7 @@ static void sysrq_handle_xmon(int key, struct pt_regs *pt_regs,
                               struct tty_struct *tty) 
 {
         /* ensure xmon is enabled */
-        xmon_init();
+        xmon_init(1);
         debugger(pt_regs);
 }
 
@@ -61,7 +61,9 @@ xmon_read(void *handle, void *ptr, int nb)
 int
 xmon_read_poll(void)
 {
-        return udbg_getc_poll();
+        if (udbg_getc_poll)
+                return udbg_getc_poll();
+        return -1;
 }
  
 FILE *xmon_stdin;
diff --git a/arch/ppc64/xmon/xmon.c b/arch/ppc64/xmon/xmon.c
index 05539439e6bc..74e63a886a69 100644
--- a/arch/ppc64/xmon/xmon.c
+++ b/arch/ppc64/xmon/xmon.c
@@ -586,6 +586,8 @@ int xmon_dabr_match(struct pt_regs *regs)
 {
         if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF))
                 return 0;
+        if (dabr.enabled == 0)
+                return 0;
         xmon_core(regs, 0);
         return 1;
 }
@@ -628,20 +630,6 @@ int xmon_fault_handler(struct pt_regs *regs)
         return 0;
 }
 
-/* On systems with a hypervisor, we can't set the DABR
-   (data address breakpoint register) directly. */
-static void set_controlled_dabr(unsigned long val)
-{
-#ifdef CONFIG_PPC_PSERIES
-        if (systemcfg->platform == PLATFORM_PSERIES_LPAR) {
-                int rc = plpar_hcall_norets(H_SET_DABR, val);
-                if (rc != H_Success)
-                        xmon_printf("Warning: setting DABR failed (%d)\n", rc);
-        } else
-#endif
-                set_dabr(val);
-}
-
 static struct bpt *at_breakpoint(unsigned long pc)
 {
         int i;
@@ -728,7 +716,7 @@ static void insert_bpts(void)
 static void insert_cpu_bpts(void)
 {
         if (dabr.enabled)
-                set_controlled_dabr(dabr.address | (dabr.enabled & 7));
+                set_dabr(dabr.address | (dabr.enabled & 7));
         if (iabr && cpu_has_feature(CPU_FTR_IABR))
                 set_iabr(iabr->address
                          | (iabr->enabled & (BP_IABR|BP_IABR_TE)));
@@ -756,7 +744,7 @@ static void remove_bpts(void)
 
 static void remove_cpu_bpts(void)
 {
-        set_controlled_dabr(0);
+        set_dabr(0);
         if (cpu_has_feature(CPU_FTR_IABR))
                 set_iabr(0);
 }
@@ -2496,15 +2484,25 @@ static void dump_stab(void)
         }
 }
 
-void xmon_init(void)
+void xmon_init(int enable)
 {
-        __debugger = xmon;
-        __debugger_ipi = xmon_ipi;
-        __debugger_bpt = xmon_bpt;
-        __debugger_sstep = xmon_sstep;
-        __debugger_iabr_match = xmon_iabr_match;
-        __debugger_dabr_match = xmon_dabr_match;
-        __debugger_fault_handler = xmon_fault_handler;
+        if (enable) {
+                __debugger = xmon;
+                __debugger_ipi = xmon_ipi;
+                __debugger_bpt = xmon_bpt;
+                __debugger_sstep = xmon_sstep;
+                __debugger_iabr_match = xmon_iabr_match;
+                __debugger_dabr_match = xmon_dabr_match;
+                __debugger_fault_handler = xmon_fault_handler;
+        } else {
+                __debugger = NULL;
+                __debugger_ipi = NULL;
+                __debugger_bpt = NULL;
+                __debugger_sstep = NULL;
+                __debugger_iabr_match = NULL;
+                __debugger_dabr_match = NULL;
+                __debugger_fault_handler = NULL;
+        }
 }
 
 void dump_segments(void)