Merge samba.org:/scratch/anton/linux-2.5

into samba.org:/scratch/anton/sfr

arch/ppc64/defconfig

@@ -46,6 +46,7 @@ CONFIG_NR_CPUS=32
 # CONFIG_HMT is not set
 # CONFIG_DISCONTIGMEM is not set
 # CONFIG_RTAS_FLASH is not set
+CONFIG_SCANLOG=y
 CONFIG_PPC_RTAS=y
 
 #
@@ -54,7 +55,6 @@ CONFIG_PPC_RTAS=y
 CONFIG_PCI=y
 CONFIG_KCORE_ELF=y
 CONFIG_BINFMT_ELF=y
-CONFIG_BINFMT_ELF32=y
 # CONFIG_BINFMT_MISC is not set
 CONFIG_PCI_LEGACY_PROC=y
 CONFIG_PCI_NAMES=y

arch/ppc64/kernel/htab.c

@@ -46,6 +46,7 @@
 #include <asm/io.h>
 #include <asm/eeh.h>
 #include <asm/tlb.h>
+#include <asm/cacheflush.h>
 
 /*
  * Note:  pte   --> Linux PTE
@@ -348,6 +349,9 @@ int __hash_page(unsigned long ea, unsigned long access, unsigned long vsid,
                         }
 		}
 
+		if (unlikely(slot == -2))
+			panic("hash_page: pte_insert failed\n");
+
 		pte_val(new_pte) |= (slot<<12) & _PAGE_GROUP_IX;
 
 		/* 

arch/ppc64/kernel/open_pic.c

@@ -555,14 +555,15 @@ void openpic_request_IPIs(void)
 	if (OpenPIC == NULL)
 		return;
 
-	request_irq(openpic_vec_ipi,
-		    openpic_ipi_action, 0, "IPI0 (call function)", 0);
-	request_irq(openpic_vec_ipi+1,
-		    openpic_ipi_action, 0, "IPI1 (reschedule)", 0);
-	request_irq(openpic_vec_ipi+2,
-		    openpic_ipi_action, 0, "IPI2 (invalidate tlb)", 0);
-	request_irq(openpic_vec_ipi+3,
-		    openpic_ipi_action, 0, "IPI3 (xmon break)", 0);
+	/* IPIs are marked SA_INTERRUPT as they must run with irqs disabled */
+	request_irq(openpic_vec_ipi, openpic_ipi_action, SA_INTERRUPT,
+		    "IPI0 (call function)", 0);
+	request_irq(openpic_vec_ipi+1, openpic_ipi_action, SA_INTERRUPT,
+		   "IPI1 (reschedule)", 0);
+	request_irq(openpic_vec_ipi+2, openpic_ipi_action, SA_INTERRUPT,
+		   "IPI2 (invalidate tlb)", 0);
+	request_irq(openpic_vec_ipi+3, openpic_ipi_action, SA_INTERRUPT,
+		   "IPI3 (xmon break)", 0);
 
 	for ( i = 0; i < OPENPIC_NUM_IPI ; i++ )
 		openpic_enable_ipi(openpic_vec_ipi+i);
@@ -754,17 +755,12 @@ static void openpic_set_affinity(unsigned int irq_nr, unsigned long cpumask)
 #ifdef CONFIG_SMP
 static void openpic_end_ipi(unsigned int irq_nr)
 {
-	/* IPIs are marked IRQ_PER_CPU. This has the side effect of
+	/*
+	 * IPIs are marked IRQ_PER_CPU. This has the side effect of
 	 * preventing the IRQ_PENDING/IRQ_INPROGRESS logic from
 	 * applying to them. We EOI them late to avoid re-entering.
-	 * however, I'm wondering if we could simply let them have the
-	 * SA_INTERRUPT flag and let them execute with all interrupts OFF.
-	 * This would have the side effect of either running cross-CPU
-	 * functions with interrupts off, or we can re-enable them explicitely
-	 * with a local_irq_enable() in smp_call_function_interrupt(), since
-	 * smp_call_function() is protected by a spinlock.
-	 * Or maybe we shouldn't set the IRQ_PER_CPU flag on cross-CPU
-	 * function calls IPI at all but that would make a special case.
+	 * We mark IPI's with SA_INTERRUPT as they must run with
+	 * irqs disabled.
 	 */
 	openpic_eoi();
 }

arch/ppc64/kernel/pSeries_lpar.c

@@ -460,8 +460,13 @@ long pSeries_lpar_hpte_insert(unsigned long hpte_group,
 	if (lpar_rc == H_PTEG_Full)
 		return -1;
 
+	/*
+	 * Since we try and ioremap PHBs we dont own, the pte insert
+	 * will fail. However we must catch the failure in hash_page
+	 * or we will loop forever, so return -2 in this case.
+	 */
 	if (lpar_rc != H_Success)
-		panic("Bad return code from pte enter rc = %lx\n", lpar_rc);
+		return -2;
 
 	return slot;
 }

arch/ppc64/kernel/signal32.c

@@ -29,6 +29,8 @@
 #include <asm/unistd.h>
 #include <asm/cacheflush.h>
 
+#define DEBUG_SIG 0
+
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 /* 
  * These are the flags in the MSR that the user is allowed to change

arch/ppc64/kernel/xics.c

@@ -15,6 +15,7 @@
 #include <linux/irq.h>
 #include <linux/smp.h>
 #include <linux/interrupt.h>
+#include <linux/signal.h>
 #include <asm/prom.h>
 #include <asm/io.h>
 #include <asm/pgtable.h>
@@ -423,8 +424,11 @@ xics_init_IRQ( void )
 	}
 
 #ifdef CONFIG_SMP
-	real_irq_to_virt_map[XICS_IPI] = virt_irq_to_real_map[XICS_IPI] = XICS_IPI;
-	request_irq(XICS_IPI + XICS_IRQ_OFFSET, xics_ipi_action, 0, "IPI", 0);
+	real_irq_to_virt_map[XICS_IPI] = virt_irq_to_real_map[XICS_IPI] =
+		XICS_IPI;
+	/* IPIs are marked SA_INTERRUPT as they must run with irqs disabled */
+	request_irq(XICS_IPI + XICS_IRQ_OFFSET, xics_ipi_action, SA_INTERRUPT,
+		    "IPI", 0);
 	irq_desc[XICS_IPI+XICS_IRQ_OFFSET].status |= IRQ_PER_CPU;
 #endif
 	ppc64_boot_msg(0x21, "XICS Done");

arch/ppc64/mm/init.c

@@ -233,6 +233,7 @@ static void map_io_page(unsigned long ea, unsigned long pa, int flags)
 
 		hpteg = ((hash & htab_data.htab_hash_mask)*HPTES_PER_GROUP);
 
+		/* Panic if a pte grpup is full */
 		if (ppc_md.hpte_insert(hpteg, va, pa >> PAGE_SHIFT, 0,
 				       _PAGE_NO_CACHE|_PAGE_GUARDED|PP_RWXX,
 				       1, 0) == -1) {

include/asm-ppc64/hardirq.h

@@ -82,7 +82,7 @@ typedef struct {
 
 #define irq_enter()		(preempt_count() += HARDIRQ_OFFSET)
 
-#if CONFIG_PREEMPT
+#ifdef CONFIG_PREEMPT
 # define in_atomic()	((preempt_count() & ~PREEMPT_ACTIVE) != kernel_locked())
 # define IRQ_EXIT_OFFSET (HARDIRQ_OFFSET-1)
 #else

include/asm-ppc64/semaphore.h

@@ -23,12 +23,12 @@ struct semaphore {
 	 */
 	atomic_t count;
 	wait_queue_head_t wait;
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	long __magic;
 #endif
 };
 
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 # define __SEM_DEBUG_INIT(name) \
 		, (long)&(name).__magic
 #else
@@ -53,7 +53,7 @@ static inline void sema_init (struct semaphore *sem, int val)
 {
 	atomic_set(&sem->count, val);
 	init_waitqueue_head(&sem->wait);
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	sem->__magic = (long)&sem->__magic;
 #endif
 }
@@ -74,7 +74,7 @@ extern void __up(struct semaphore * sem);
 
 static inline void down(struct semaphore * sem)
 {
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	CHECK_MAGIC(sem->__magic);
 #endif
 	might_sleep();
@@ -91,7 +91,7 @@ static inline int down_interruptible(struct semaphore * sem)
 {
 	int ret = 0;
 
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	CHECK_MAGIC(sem->__magic);
 #endif
 	might_sleep();
@@ -106,7 +106,7 @@ static inline int down_trylock(struct semaphore * sem)
 {
 	int ret;
 
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	CHECK_MAGIC(sem->__magic);
 #endif
 
@@ -117,7 +117,7 @@ static inline int down_trylock(struct semaphore * sem)
 
 static inline void up(struct semaphore * sem)
 {
-#if WAITQUEUE_DEBUG
+#ifdef WAITQUEUE_DEBUG
 	CHECK_MAGIC(sem->__magic);
 #endif