---

yaml
---
r: 190826
b: refs/heads/master
c: 6a45f78
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: aa86f26bd81a46985f1b32e513638d1c36cf3104
+refs/heads/master: 6a45f7822544c54a2cf070d84f4e85f2fb32ec02

trunk/Documentation/filesystems/proc.txt

@@ -316,7 +316,7 @@ address           perms offset  dev   inode      pathname
 08049000-0804a000 rw-p 00001000 03:00 8312       /opt/test
 0804a000-0806b000 rw-p 00000000 00:00 0          [heap]
 a7cb1000-a7cb2000 ---p 00000000 00:00 0
-a7cb2000-a7eb2000 rw-p 00000000 00:00 0
+a7cb2000-a7eb2000 rw-p 00000000 00:00 0          [threadstack:001ff4b4]
 a7eb2000-a7eb3000 ---p 00000000 00:00 0
 a7eb3000-a7ed5000 rw-p 00000000 00:00 0
 a7ed5000-a8008000 r-xp 00000000 03:00 4222       /lib/libc.so.6
@@ -352,6 +352,7 @@ is not associated with a file:
  [stack]                  = the stack of the main process
  [vdso]                   = the "virtual dynamic shared object",
                             the kernel system call handler
+ [threadstack:xxxxxxxx]   = the stack of the thread, xxxxxxxx is the stack size
 
  or if empty, the mapping is anonymous.
 

trunk/arch/powerpc/include/asm/hw_irq.h

@@ -130,5 +130,43 @@ static inline int irqs_disabled_flags(unsigned long flags)
  */
 struct irq_chip;
 
+#ifdef CONFIG_PERF_EVENTS
+
+#ifdef CONFIG_PPC64
+static inline unsigned long test_perf_event_pending(void)
+{
+	unsigned long x;
+
+	asm volatile("lbz %0,%1(13)"
+		: "=r" (x)
+		: "i" (offsetof(struct paca_struct, perf_event_pending)));
+	return x;
+}
+
+static inline void set_perf_event_pending(void)
+{
+	asm volatile("stb %0,%1(13)" : :
+		"r" (1),
+		"i" (offsetof(struct paca_struct, perf_event_pending)));
+}
+
+static inline void clear_perf_event_pending(void)
+{
+	asm volatile("stb %0,%1(13)" : :
+		"r" (0),
+		"i" (offsetof(struct paca_struct, perf_event_pending)));
+}
+#endif /* CONFIG_PPC64 */
+
+#else  /* CONFIG_PERF_EVENTS */
+
+static inline unsigned long test_perf_event_pending(void)
+{
+	return 0;
+}
+
+static inline void clear_perf_event_pending(void) {}
+#endif /* CONFIG_PERF_EVENTS */
+
 #endif	/* __KERNEL__ */
 #endif	/* _ASM_POWERPC_HW_IRQ_H */

trunk/arch/powerpc/kernel/asm-offsets.c

@@ -133,6 +133,7 @@ int main(void)
 	DEFINE(PACAKMSR, offsetof(struct paca_struct, kernel_msr));
 	DEFINE(PACASOFTIRQEN, offsetof(struct paca_struct, soft_enabled));
 	DEFINE(PACAHARDIRQEN, offsetof(struct paca_struct, hard_enabled));
+	DEFINE(PACAPERFPEND, offsetof(struct paca_struct, perf_event_pending));
 	DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id));
 #ifdef CONFIG_PPC_MM_SLICES
 	DEFINE(PACALOWSLICESPSIZE, offsetof(struct paca_struct,

trunk/arch/powerpc/kernel/dma-swiotlb.c

@@ -1,8 +1,7 @@
 /*
  * Contains routines needed to support swiotlb for ppc.
  *
- * Copyright (C) 2009-2010 Freescale Semiconductor, Inc.
- * Author: Becky Bruce
+ * Copyright (C) 2009 Becky Bruce, Freescale Semiconductor
  *
  * This program is free software; you can redistribute  it and/or modify it
  * under  the terms of  the GNU General  Public License as published by the
@@ -71,7 +70,7 @@ static int ppc_swiotlb_bus_notify(struct notifier_block *nb,
 	sd->max_direct_dma_addr = 0;
 
 	/* May need to bounce if the device can't address all of DRAM */
-	if ((dma_get_mask(dev) + 1) < lmb_end_of_DRAM())
+	if (dma_get_mask(dev) < lmb_end_of_DRAM())
 		set_dma_ops(dev, &swiotlb_dma_ops);
 
 	return NOTIFY_DONE;

trunk/arch/powerpc/kernel/entry_64.S

@@ -556,6 +556,15 @@ ALT_FW_FTR_SECTION_END_IFCLR(FW_FEATURE_ISERIES)
 2:
 	TRACE_AND_RESTORE_IRQ(r5);
 
+#ifdef CONFIG_PERF_EVENTS
+	/* check paca->perf_event_pending if we're enabling ints */
+	lbz	r3,PACAPERFPEND(r13)
+	and.	r3,r3,r5
+	beq	27f
+	bl	.perf_event_do_pending
+27:
+#endif /* CONFIG_PERF_EVENTS */
+
 	/* extract EE bit and use it to restore paca->hard_enabled */
 	ld	r3,_MSR(r1)
 	rldicl	r4,r3,49,63		/* r0 = (r3 >> 15) & 1 */

trunk/arch/powerpc/kernel/irq.c

@@ -53,6 +53,7 @@
 #include <linux/bootmem.h>
 #include <linux/pci.h>
 #include <linux/debugfs.h>
+#include <linux/perf_event.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -144,6 +145,11 @@ notrace void raw_local_irq_restore(unsigned long en)
 	}
 #endif /* CONFIG_PPC_STD_MMU_64 */
 
+	if (test_perf_event_pending()) {
+		clear_perf_event_pending();
+		perf_event_do_pending();
+	}
+
 	/*
 	 * if (get_paca()->hard_enabled) return;
 	 * But again we need to take care that gcc gets hard_enabled directly

trunk/arch/powerpc/kernel/time.c

@@ -532,60 +532,25 @@ void __init iSeries_time_init_early(void)
 }
 #endif /* CONFIG_PPC_ISERIES */
 
-#ifdef CONFIG_PERF_EVENTS
-
-/*
- * 64-bit uses a byte in the PACA, 32-bit uses a per-cpu variable...
- */
-#ifdef CONFIG_PPC64
-static inline unsigned long test_perf_event_pending(void)
-{
-	unsigned long x;
-
-	asm volatile("lbz %0,%1(13)"
-		: "=r" (x)
-		: "i" (offsetof(struct paca_struct, perf_event_pending)));
-	return x;
-}
-
-static inline void set_perf_event_pending_flag(void)
-{
-	asm volatile("stb %0,%1(13)" : :
-		"r" (1),
-		"i" (offsetof(struct paca_struct, perf_event_pending)));
-}
-
-static inline void clear_perf_event_pending(void)
-{
-	asm volatile("stb %0,%1(13)" : :
-		"r" (0),
-		"i" (offsetof(struct paca_struct, perf_event_pending)));
-}
-
-#else /* 32-bit */
-
+#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_PPC32)
 DEFINE_PER_CPU(u8, perf_event_pending);
 
-#define set_perf_event_pending_flag()	__get_cpu_var(perf_event_pending) = 1
-#define test_perf_event_pending()	__get_cpu_var(perf_event_pending)
-#define clear_perf_event_pending()	__get_cpu_var(perf_event_pending) = 0
-
-#endif /* 32 vs 64 bit */
-
 void set_perf_event_pending(void)
 {
-	preempt_disable();
-	set_perf_event_pending_flag();
+	get_cpu_var(perf_event_pending) = 1;
 	set_dec(1);
-	preempt_enable();
+	put_cpu_var(perf_event_pending);
 }
 
-#else  /* CONFIG_PERF_EVENTS */
+#define test_perf_event_pending()	__get_cpu_var(perf_event_pending)
+#define clear_perf_event_pending()	__get_cpu_var(perf_event_pending) = 0
+
+#else  /* CONFIG_PERF_EVENTS && CONFIG_PPC32 */
 
 #define test_perf_event_pending()	0
 #define clear_perf_event_pending()
 
-#endif /* CONFIG_PERF_EVENTS */
+#endif /* CONFIG_PERF_EVENTS && CONFIG_PPC32 */
 
 /*
  * For iSeries shared processors, we have to let the hypervisor
@@ -617,6 +582,10 @@ void timer_interrupt(struct pt_regs * regs)
 	set_dec(DECREMENTER_MAX);
 
 #ifdef CONFIG_PPC32
+	if (test_perf_event_pending()) {
+		clear_perf_event_pending();
+		perf_event_do_pending();
+	}
 	if (atomic_read(&ppc_n_lost_interrupts) != 0)
 		do_IRQ(regs);
 #endif
@@ -635,11 +604,6 @@ void timer_interrupt(struct pt_regs * regs)
 
 	calculate_steal_time();
 
-	if (test_perf_event_pending()) {
-		clear_perf_event_pending();
-		perf_event_do_pending();
-	}
-
 #ifdef CONFIG_PPC_ISERIES
 	if (firmware_has_feature(FW_FEATURE_ISERIES))
 		get_lppaca()->int_dword.fields.decr_int = 0;

trunk/arch/s390/kernel/head31.S

@@ -82,7 +82,7 @@ startup_continue:
 _ehead:
 
 #ifdef CONFIG_SHARED_KERNEL
-	.org	0x100000 - 0x11000	# head.o ends at 0x11000
+	.org	0x100000
 #endif
 
 #

trunk/arch/s390/kernel/head64.S

@@ -80,7 +80,7 @@ startup_continue:
 _ehead:
 
 #ifdef CONFIG_SHARED_KERNEL
-	.org	0x100000 - 0x11000	# head.o ends at 0x11000
+	.org	0x100000
 #endif
 
 #

trunk/arch/s390/kernel/ptrace.c

@@ -640,7 +640,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 
 asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
 {
-	long ret = 0;
+	long ret;
 
 	/* Do the secure computing check first. */
 	secure_computing(regs->gprs[2]);
@@ -649,6 +649,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
 	 * The sysc_tracesys code in entry.S stored the system
 	 * call number to gprs[2].
 	 */
+	ret = regs->gprs[2];
 	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
 	    (tracehook_report_syscall_entry(regs) ||
 	     regs->gprs[2] >= NR_syscalls)) {
@@ -670,7 +671,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
 				    regs->gprs[2], regs->orig_gpr2,
 				    regs->gprs[3], regs->gprs[4],
 				    regs->gprs[5]);
-	return ret ?: regs->gprs[2];
+	return ret;
 }
 
 asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)

trunk/arch/x86/kernel/kprobes.c

@@ -534,6 +534,20 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 	struct kprobe_ctlblk *kcb;
 
 	addr = (kprobe_opcode_t *)(regs->ip - sizeof(kprobe_opcode_t));
+	if (*addr != BREAKPOINT_INSTRUCTION) {
+		/*
+		 * The breakpoint instruction was removed right
+		 * after we hit it.  Another cpu has removed
+		 * either a probepoint or a debugger breakpoint
+		 * at this address.  In either case, no further
+		 * handling of this interrupt is appropriate.
+		 * Back up over the (now missing) int3 and run
+		 * the original instruction.
+		 */
+		regs->ip = (unsigned long)addr;
+		return 1;
+	}
+
 	/*
 	 * We don't want to be preempted for the entire
 	 * duration of kprobe processing. We conditionally
@@ -565,19 +579,6 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 				setup_singlestep(p, regs, kcb, 0);
 			return 1;
 		}
-	} else if (*addr != BREAKPOINT_INSTRUCTION) {
-		/*
-		 * The breakpoint instruction was removed right
-		 * after we hit it.  Another cpu has removed
-		 * either a probepoint or a debugger breakpoint
-		 * at this address.  In either case, no further
-		 * handling of this interrupt is appropriate.
-		 * Back up over the (now missing) int3 and run
-		 * the original instruction.
-		 */
-		regs->ip = (unsigned long)addr;
-		preempt_enable_no_resched();
-		return 1;
 	} else if (kprobe_running()) {
 		p = __get_cpu_var(current_kprobe);
 		if (p->break_handler && p->break_handler(p, regs)) {