Merge commit 'v2.6.26' into core/locking

11 files changed, 144 insertions, 63 deletions

diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 853d1f11be0..43687cc60df 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -465,7 +465,6 @@ void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 		printk(KERN_ERR
 		       "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
 		       len, slit->header.length);
-		memset(numa_slit, 10, sizeof(numa_slit));
 		return;
 	}
 	slit_table = slit;
@@ -574,8 +573,14 @@ void __init acpi_numa_arch_fixup(void)
 	printk(KERN_INFO "Number of memory chunks in system = %d\n",
 	       num_node_memblks);
 
-	if (!slit_table)
+	if (!slit_table) {
+		for (i = 0; i < MAX_NUMNODES; i++)
+			for (j = 0; j < MAX_NUMNODES; j++)
+				node_distance(i, j) = i == j ? LOCAL_DISTANCE :
+							REMOTE_DISTANCE;
 		return;
+	}
+
 	memset(numa_slit, -1, sizeof(numa_slit));
 	for (i = 0; i < slit_table->locality_count; i++) {
 		if (!pxm_bit_test(i))
diff --git a/arch/ia64/kernel/init_task.c b/arch/ia64/kernel/init_task.c
index bc8efcad28b..9d7e1c66faf 100644
--- a/arch/ia64/kernel/init_task.c
+++ b/arch/ia64/kernel/init_task.c
@@ -18,7 +18,6 @@
 #include <asm/pgtable.h>
 
 static struct fs_struct init_fs = INIT_FS;
-static struct files_struct init_files = INIT_FILES;
 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
 struct mm_struct init_mm = INIT_MM(init_mm);
diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index 082c31dcfd9..39752cdef6f 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -558,8 +558,6 @@ static struct iosapic_rte_info * __init_refok iosapic_alloc_rte (void)
 	if (!iosapic_kmalloc_ok && list_empty(&free_rte_list)) {
 		rte = alloc_bootmem(sizeof(struct iosapic_rte_info) *
 				    NR_PREALLOCATE_RTE_ENTRIES);
-		if (!rte)
-			return NULL;
 		for (i = 0; i < NR_PREALLOCATE_RTE_ENTRIES; i++, rte++)
 			list_add(&rte->rte_list, &free_rte_list);
 	}
diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
index 6678c49daba..80b44ea052d 100644
--- a/arch/ia64/kernel/ivt.S
+++ b/arch/ia64/kernel/ivt.S
@@ -1076,48 +1076,6 @@ END(ia64_syscall_setup)
 	DBG_FAULT(15)
 	FAULT(15)
 
-	/*
-	 * Squatting in this space ...
-	 *
-	 * This special case dispatcher for illegal operation faults allows preserved
-	 * registers to be modified through a callback function (asm only) that is handed
-	 * back from the fault handler in r8. Up to three arguments can be passed to the
-	 * callback function by returning an aggregate with the callback as its first
-	 * element, followed by the arguments.
-	 */
-ENTRY(dispatch_illegal_op_fault)
-	.prologue
-	.body
-	SAVE_MIN_WITH_COVER
-	ssm psr.ic | PSR_DEFAULT_BITS
-	;;
-	srlz.i		// guarantee that interruption collection is on
-	;;
-(p15)	ssm psr.i	// restore psr.i
-	adds r3=8,r2	// set up second base pointer for SAVE_REST
-	;;
-	alloc r14=ar.pfs,0,0,1,0	// must be first in insn group
-	mov out0=ar.ec
-	;;
-	SAVE_REST
-	PT_REGS_UNWIND_INFO(0)
-	;;
-	br.call.sptk.many rp=ia64_illegal_op_fault
-.ret0:	;;
-	alloc r14=ar.pfs,0,0,3,0	// must be first in insn group
-	mov out0=r9
-	mov out1=r10
-	mov out2=r11
-	movl r15=ia64_leave_kernel
-	;;
-	mov rp=r15
-	mov b6=r8
-	;;
-	cmp.ne p6,p0=0,r8
-(p6)	br.call.dpnt.many b6=b6		// call returns to ia64_leave_kernel
-	br.sptk.many ia64_leave_kernel
-END(dispatch_illegal_op_fault)
-
 	.org ia64_ivt+0x4000
 /////////////////////////////////////////////////////////////////////////////////////////
 // 0x4000 Entry 16 (size 64 bundles) Reserved
@@ -1715,6 +1673,48 @@ END(ia32_interrupt)
 	DBG_FAULT(67)
 	FAULT(67)
 
+	/*
+	 * Squatting in this space ...
+	 *
+	 * This special case dispatcher for illegal operation faults allows preserved
+	 * registers to be modified through a callback function (asm only) that is handed
+	 * back from the fault handler in r8. Up to three arguments can be passed to the
+	 * callback function by returning an aggregate with the callback as its first
+	 * element, followed by the arguments.
+	 */
+ENTRY(dispatch_illegal_op_fault)
+	.prologue
+	.body
+	SAVE_MIN_WITH_COVER
+	ssm psr.ic | PSR_DEFAULT_BITS
+	;;
+	srlz.i		// guarantee that interruption collection is on
+	;;
+(p15)	ssm psr.i	// restore psr.i
+	adds r3=8,r2	// set up second base pointer for SAVE_REST
+	;;
+	alloc r14=ar.pfs,0,0,1,0	// must be first in insn group
+	mov out0=ar.ec
+	;;
+	SAVE_REST
+	PT_REGS_UNWIND_INFO(0)
+	;;
+	br.call.sptk.many rp=ia64_illegal_op_fault
+.ret0:	;;
+	alloc r14=ar.pfs,0,0,3,0	// must be first in insn group
+	mov out0=r9
+	mov out1=r10
+	mov out2=r11
+	movl r15=ia64_leave_kernel
+	;;
+	mov rp=r15
+	mov b6=r8
+	;;
+	cmp.ne p6,p0=0,r8
+(p6)	br.call.dpnt.many b6=b6		// call returns to ia64_leave_kernel
+	br.sptk.many ia64_leave_kernel
+END(dispatch_illegal_op_fault)
+
 #ifdef CONFIG_IA32_SUPPORT
 
 	/*
diff --git a/arch/ia64/kernel/minstate.h b/arch/ia64/kernel/minstate.h
index 7c548ac52bb..74b6d670aae 100644
--- a/arch/ia64/kernel/minstate.h
+++ b/arch/ia64/kernel/minstate.h
@@ -15,6 +15,9 @@
 #define ACCOUNT_SYS_ENTER
 #endif
 
+.section ".data.patch.rse", "a"
+.previous
+
 /*
  * DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves
  * the minimum state necessary that allows us to turn psr.ic back
@@ -40,7 +43,7 @@
  * Note that psr.ic is NOT turned on by this macro.  This is so that
  * we can pass interruption state as arguments to a handler.
  */
-#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA)							\
+#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA,WORKAROUND)						\
 	mov r16=IA64_KR(CURRENT);	/* M */							\
 	mov r27=ar.rsc;			/* M */							\
 	mov r20=r1;			/* A */							\
@@ -87,6 +90,7 @@
 	tbit.nz p15,p0=r29,IA64_PSR_I_BIT;							\
 	mov r29=b0										\
 	;;											\
+	WORKAROUND;										\
 	adds r16=PT(R8),r1;	/* initialize first base pointer */				\
 	adds r17=PT(R9),r1;	/* initialize second base pointer */				\
 (pKStk)	mov r18=r0;		/* make sure r18 isn't NaT */					\
@@ -206,6 +210,40 @@
 	st8 [r25]=r10;      	/* ar.ssd */	\
 	;;
 
-#define SAVE_MIN_WITH_COVER	DO_SAVE_MIN(cover, mov r30=cr.ifs,)
-#define SAVE_MIN_WITH_COVER_R19	DO_SAVE_MIN(cover, mov r30=cr.ifs, mov r15=r19)
-#define SAVE_MIN		DO_SAVE_MIN(     , mov r30=r0, )
+#define RSE_WORKAROUND				\
+(pUStk) extr.u r17=r18,3,6;			\
+(pUStk)	sub r16=r18,r22;			\
+[1:](pKStk)	br.cond.sptk.many 1f;		\
+	.xdata4 ".data.patch.rse",1b-.		\
+	;;					\
+	cmp.ge p6,p7 = 33,r17;			\
+	;;					\
+(p6)	mov r17=0x310;				\
+(p7)	mov r17=0x308;				\
+	;;					\
+	cmp.leu p1,p0=r16,r17;			\
+(p1)	br.cond.sptk.many 1f;			\
+	dep.z r17=r26,0,62;			\
+	movl r16=2f;				\
+	;;					\
+	mov ar.pfs=r17;				\
+	dep r27=r0,r27,16,14;			\
+	mov b0=r16;				\
+	;;					\
+	br.ret.sptk b0;				\
+	;;					\
+2:						\
+	mov ar.rsc=r0				\
+	;;					\
+	flushrs;				\
+	;;					\
+	mov ar.bspstore=r22			\
+	;;					\
+	mov r18=ar.bsp;				\
+	;;					\
+1:						\
+	.pred.rel "mutex", pKStk, pUStk
+
+#define SAVE_MIN_WITH_COVER	DO_SAVE_MIN(cover, mov r30=cr.ifs, , RSE_WORKAROUND)
+#define SAVE_MIN_WITH_COVER_R19	DO_SAVE_MIN(cover, mov r30=cr.ifs, mov r15=r19, RSE_WORKAROUND)
+#define SAVE_MIN			DO_SAVE_MIN(     , mov r30=r0, , )
diff --git a/arch/ia64/kernel/patch.c b/arch/ia64/kernel/patch.c
index e0dca8743db..b83b2c51600 100644
--- a/arch/ia64/kernel/patch.c
+++ b/arch/ia64/kernel/patch.c
@@ -115,6 +115,29 @@ ia64_patch_vtop (unsigned long start, unsigned long end)
 	ia64_srlz_i();
 }
 
+/*
+ * Disable the RSE workaround by turning the conditional branch
+ * that we tagged in each place the workaround was used into an
+ * unconditional branch.
+ */
+void __init
+ia64_patch_rse (unsigned long start, unsigned long end)
+{
+	s32 *offp = (s32 *) start;
+	u64 ip, *b;
+
+	while (offp < (s32 *) end) {
+		ip = (u64) offp + *offp;
+
+		b = (u64 *)(ip & -16);
+		b[1] &= ~0xf800000L;
+		ia64_fc((void *) ip);
+		++offp;
+	}
+	ia64_sync_i();
+	ia64_srlz_i();
+}
+
 void __init
 ia64_patch_mckinley_e9 (unsigned long start, unsigned long end)
 {
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 71d05133f55..7714a97b010 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -1864,11 +1864,6 @@ pfm_flush(struct file *filp, fl_owner_t id)
 	 * invoked after, it will find an empty queue and no
 	 * signal will be sent. In both case, we are safe
 	 */
-	if (filp->f_flags & FASYNC) {
-		DPRINT(("cleaning up async_queue=%p\n", ctx->ctx_async_queue));
-		pfm_do_fasync (-1, filp, ctx, 0);
-	}
-
 	PROTECT_CTX(ctx, flags);
 
 	state     = ctx->ctx_state;
@@ -1999,6 +1994,11 @@ pfm_close(struct inode *inode, struct file *filp)
 		return -EBADF;
 	}
 
+	if (filp->f_flags & FASYNC) {
+		DPRINT(("cleaning up async_queue=%p\n", ctx->ctx_async_queue));
+		pfm_do_fasync(-1, filp, ctx, 0);
+	}
+
 	PROTECT_CTX(ctx, flags);
 
 	state     = ctx->ctx_state;
diff --git a/arch/ia64/kernel/sal.c b/arch/ia64/kernel/sal.c
index 7e0259709c0..0464173ea56 100644
--- a/arch/ia64/kernel/sal.c
+++ b/arch/ia64/kernel/sal.c
@@ -252,11 +252,10 @@ check_sal_cache_flush (void)
 	local_irq_save(flags);
 
 	/*
-	 * Schedule a timer interrupt, wait until it's reported, and see if
-	 * SAL_CACHE_FLUSH drops it.
+	 * Send ourselves a timer interrupt, wait until it's reported, and see
+	 * if SAL_CACHE_FLUSH drops it.
 	 */
-	ia64_set_itv(IA64_TIMER_VECTOR);
-	ia64_set_itm(ia64_get_itc() + 1000);
+	platform_send_ipi(cpu, IA64_TIMER_VECTOR, IA64_IPI_DM_INT, 0);
 
 	while (!ia64_get_irr(IA64_TIMER_VECTOR))
 		cpu_relax();
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index e9596cd0cda..632cda8f2e7 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -547,7 +547,8 @@ setup_arch (char **cmdline_p)
 # ifdef CONFIG_ACPI_NUMA
 	acpi_numa_init();
 	per_cpu_scan_finalize((cpus_weight(early_cpu_possible_map) == 0 ?
-		32 : cpus_weight(early_cpu_possible_map)), additional_cpus);
+		32 : cpus_weight(early_cpu_possible_map)),
+		additional_cpus > 0 ? additional_cpus : 0);
 # endif
 #else
 # ifdef CONFIG_SMP
@@ -560,6 +561,17 @@ setup_arch (char **cmdline_p)
 	/* process SAL system table: */
 	ia64_sal_init(__va(efi.sal_systab));
 
+#ifdef CONFIG_ITANIUM
+	ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
+#else
+	{
+		u64 num_phys_stacked;
+
+		if (ia64_pal_rse_info(&num_phys_stacked, 0) == 0 && num_phys_stacked > 96)
+			ia64_patch_rse((u64) __start___rse_patchlist, (u64) __end___rse_patchlist);
+	}
+#endif
+
 #ifdef CONFIG_SMP
 	cpu_physical_id(0) = hard_smp_processor_id();
 #endif
@@ -567,8 +579,6 @@ setup_arch (char **cmdline_p)
 	cpu_init();	/* initialize the bootstrap CPU */
 	mmu_context_init();	/* initialize context_id bitmap */
 
-	check_sal_cache_flush();
-
 #ifdef CONFIG_ACPI
 	acpi_boot_init();
 #endif
@@ -596,6 +606,7 @@ setup_arch (char **cmdline_p)
 		ia64_mca_init();
 
 	platform_setup(cmdline_p);
+	check_sal_cache_flush();
 	paging_init();
 }
 
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 8c73643f2d6..aad1b7b1fff 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -117,6 +117,7 @@ void account_system_vtime(struct task_struct *tsk)
 
 	local_irq_restore(flags);
 }
+EXPORT_SYMBOL_GPL(account_system_vtime);
 
 /*
  * Called from the timer interrupt handler to charge accumulated user time
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index 80622acc95d..5929ab10a28 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -156,6 +156,13 @@ SECTIONS
 	  __end___vtop_patchlist = .;
 	}
 
+  .data.patch.rse : AT(ADDR(.data.patch.rse) - LOAD_OFFSET)
+	{
+	  __start___rse_patchlist = .;
+	  *(.data.patch.rse)
+	  __end___rse_patchlist = .;
+	}
+
   .data.patch.mckinley_e9 : AT(ADDR(.data.patch.mckinley_e9) - LOAD_OFFSET)
 	{
 	  __start___mckinley_e9_bundles = .;