---

yaml --- r: 67415 b: refs/heads/master c: 048c8bc h: refs/heads/master i: 67413: 838006c 67411: 1351c30 67407: 20d1e27 v: v3
git-mirror · Oct 3, 2007 · 34d5c9a · 34d5c9a
1 parent 0d268ba
commit 34d5c9a
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Showing 7 changed files with 17 additions and 6 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5669c3cf19fbadaa9120b59914beec8431277efe
+refs/heads/master: 048c8bc90e53bf1f5feec020a7d482da94894e93
diff --git a/trunk/arch/powerpc/kernel/lparcfg.c b/trunk/arch/powerpc/kernel/lparcfg.c
@@ -77,7 +77,7 @@ static int iseries_lparcfg_data(struct seq_file *m, void *v)
 	int processors, max_processors;
 	unsigned long purr = get_purr();
 
-	shared = (int)(get_lppaca()->shared_proc);
+	shared = (int)(local_paca->lppaca_ptr->shared_proc);
 
 	seq_printf(m, "system_active_processors=%d\n",
 		   (int)HvLpConfig_getSystemPhysicalProcessors());

diff --git a/trunk/include/asm-powerpc/io.h b/trunk/include/asm-powerpc/io.h
@@ -86,7 +86,7 @@ extern unsigned long pci_dram_offset;
  */
 
 #ifdef CONFIG_PPC64
-#define IO_SET_SYNC_FLAG()	do { get_paca()->io_sync = 1; } while(0)
+#define IO_SET_SYNC_FLAG()	do { local_paca->io_sync = 1; } while(0)
 #else
 #define IO_SET_SYNC_FLAG()
 #endif

diff --git a/trunk/include/asm-powerpc/paca.h b/trunk/include/asm-powerpc/paca.h
@@ -21,7 +21,18 @@
 #include	<asm/mmu.h>
 
 register struct paca_struct *local_paca asm("r13");
+
+#if defined(CONFIG_DEBUG_PREEMPT) && defined(CONFIG_SMP)
+extern unsigned int debug_smp_processor_id(void); /* from linux/smp.h */
+/*
+ * Add standard checks that preemption cannot occur when using get_paca():
+ * otherwise the paca_struct it points to may be the wrong one just after.
+ */
+#define get_paca()	((void) debug_smp_processor_id(), local_paca)
+#else
 #define get_paca()	local_paca
+#endif
+
 #define get_lppaca()	(get_paca()->lppaca_ptr)
 #define get_slb_shadow()	(get_paca()->slb_shadow_ptr)
 

diff --git a/trunk/include/asm-powerpc/percpu.h b/trunk/include/asm-powerpc/percpu.h
@@ -28,7 +28,7 @@
 /* var is in discarded region: offset to particular copy we want */
 #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
 #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()))
-#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()))
+#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, local_paca->data_offset))
 
 /* A macro to avoid #include hell... */
 #define percpu_modcopy(pcpudst, src, size)			\

diff --git a/trunk/include/asm-powerpc/smp.h b/trunk/include/asm-powerpc/smp.h
@@ -45,7 +45,7 @@ void generic_mach_cpu_die(void);
 #endif
 
 #ifdef CONFIG_PPC64
-#define raw_smp_processor_id()	(get_paca()->paca_index)
+#define raw_smp_processor_id()	(local_paca->paca_index)
 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
 #else
 /* 32-bit */

diff --git a/trunk/lib/Kconfig.debug b/trunk/lib/Kconfig.debug
@@ -167,7 +167,7 @@ config SLUB_DEBUG_ON
 
 config DEBUG_PREEMPT
 	bool "Debug preemptible kernel"
-	depends on DEBUG_KERNEL && PREEMPT && TRACE_IRQFLAGS_SUPPORT
+	depends on DEBUG_KERNEL && PREEMPT && (TRACE_IRQFLAGS_SUPPORT || PPC64)
 	default y
 	help
 	  If you say Y here then the kernel will use a debug variant of the