Merge branch 'linux-2.6' into for-2.6.24

15 files changed, 70 insertions, 95 deletions

diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index f9524933258..97b64d7d6bf 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -614,10 +614,14 @@ config X86_PAE
 
 # Common NUMA Features
 config NUMA
-	bool "Numa Memory Allocation and Scheduler Support"
-	depends on SMP && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI)
+	bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"
+	depends on SMP && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI) && EXPERIMENTAL
 	default n if X86_PC
 	default y if (X86_NUMAQ || X86_SUMMIT)
+	help
+	  NUMA support for i386. This is currently high experimental
+	  and should be only used for kernel development. It might also
+	  cause boot failures.
 
 comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
 	depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI)
@@ -1228,6 +1232,11 @@ menuconfig INSTRUMENTATION
 	bool "Instrumentation Support"
 	depends on EXPERIMENTAL
 	default y
+	---help---
+	  Say Y here to get to see options related to performance measurement,
+	  debugging, and testing. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
 
 if INSTRUMENTATION
 
diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index 01f0ff0daaf..52b932478c6 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -51,8 +51,8 @@ cflags-y += -maccumulate-outgoing-args
 CFLAGS				+= $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;)
 
 # do binutils support CFI?
-cflags-y += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
-AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
 
 # is .cfi_signal_frame supported too?
 cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
diff --git a/arch/i386/boot/boot.h b/arch/i386/boot/boot.h
index dec70c9b605..20bab9431ac 100644
--- a/arch/i386/boot/boot.h
+++ b/arch/i386/boot/boot.h
@@ -87,7 +87,7 @@ static inline void set_fs(u16 seg)
 static inline u16 fs(void)
 {
 	u16 seg;
-	asm("movw %%fs,%0" : "=rm" (seg));
+	asm volatile("movw %%fs,%0" : "=rm" (seg));
 	return seg;
 }
 
@@ -98,7 +98,7 @@ static inline void set_gs(u16 seg)
 static inline u16 gs(void)
 {
 	u16 seg;
-	asm("movw %%gs,%0" : "=rm" (seg));
+	asm volatile("movw %%gs,%0" : "=rm" (seg));
 	return seg;
 }
 
@@ -107,19 +107,19 @@ typedef unsigned int addr_t;
 static inline u8 rdfs8(addr_t addr)
 {
 	u8 v;
-	asm("movb %%fs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
+	asm volatile("movb %%fs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
 	return v;
 }
 static inline u16 rdfs16(addr_t addr)
 {
 	u16 v;
-	asm("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
+	asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
 	return v;
 }
 static inline u32 rdfs32(addr_t addr)
 {
 	u32 v;
-	asm("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
+	asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
 	return v;
 }
 
@@ -139,19 +139,19 @@ static inline void wrfs32(u32 v, addr_t addr)
 static inline u8 rdgs8(addr_t addr)
 {
 	u8 v;
-	asm("movb %%gs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
+	asm volatile("movb %%gs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
 	return v;
 }
 static inline u16 rdgs16(addr_t addr)
 {
 	u16 v;
-	asm("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
+	asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
 	return v;
 }
 static inline u32 rdgs32(addr_t addr)
 {
 	u32 v;
-	asm("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
+	asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
 	return v;
 }
 
@@ -180,15 +180,15 @@ static inline int memcmp(const void *s1, const void *s2, size_t len)
 static inline int memcmp_fs(const void *s1, addr_t s2, size_t len)
 {
 	u8 diff;
-	asm("fs; repe; cmpsb; setnz %0"
-	    : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
+	asm volatile("fs; repe; cmpsb; setnz %0"
+		     : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
 	return diff;
 }
 static inline int memcmp_gs(const void *s1, addr_t s2, size_t len)
 {
 	u8 diff;
-	asm("gs; repe; cmpsb; setnz %0"
-	    : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
+	asm volatile("gs; repe; cmpsb; setnz %0"
+		     : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
 	return diff;
 }
 
diff --git a/arch/i386/boot/cpucheck.c b/arch/i386/boot/cpucheck.c
index 991e8ceae1d..e655a89c551 100644
--- a/arch/i386/boot/cpucheck.c
+++ b/arch/i386/boot/cpucheck.c
@@ -96,7 +96,8 @@ static int has_fpu(void)
 		asm volatile("movl %0,%%cr0" : : "r" (cr0));
 	}
 
-	asm("fninit ; fnstsw %0 ; fnstcw %1" : "+m" (fsw), "+m" (fcw));
+	asm volatile("fninit ; fnstsw %0 ; fnstcw %1"
+		     : "+m" (fsw), "+m" (fcw));
 
 	return fsw == 0 && (fcw & 0x103f) == 0x003f;
 }
diff --git a/arch/i386/boot/edd.c b/arch/i386/boot/edd.c
index 658834d9f92..bd138e442ec 100644
--- a/arch/i386/boot/edd.c
+++ b/arch/i386/boot/edd.c
@@ -19,57 +19,28 @@
 
 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
 
-struct edd_dapa {
-	u8	pkt_size;
-	u8	rsvd;
-	u16	sector_cnt;
-	u16	buf_off, buf_seg;
-	u64	lba;
-	u64	buf_lin_addr;
-};
-
 /*
  * Read the MBR (first sector) from a specific device.
  */
 static int read_mbr(u8 devno, void *buf)
 {
-	struct edd_dapa dapa;
-	u16 ax, bx, cx, dx, si;
-
-	memset(&dapa, 0, sizeof dapa);
-	dapa.pkt_size = sizeof(dapa);
-	dapa.sector_cnt = 1;
-	dapa.buf_off = (size_t)buf;
-	dapa.buf_seg = ds();
-	/* dapa.lba = 0; */
-
-	ax = 0x4200;		/* Extended Read */
-	si = (size_t)&dapa;
-	dx = devno;
-	asm("pushfl; stc; int $0x13; setc %%al; popfl"
-	    : "+a" (ax), "+S" (si), "+d" (dx)
-	    : "m" (dapa)
-	    : "ebx", "ecx", "edi", "memory");
-
-	if (!(u8)ax)
-		return 0;	/* OK */
+	u16 ax, bx, cx, dx;
 
 	ax = 0x0201;		/* Legacy Read, one sector */
 	cx = 0x0001;		/* Sector 0-0-1 */
 	dx = devno;
 	bx = (size_t)buf;
-	asm("pushfl; stc; int $0x13; setc %%al; popfl"
-	    : "+a" (ax), "+c" (cx), "+d" (dx), "+b" (bx)
-	    : : "esi", "edi", "memory");
+	asm volatile("pushfl; stc; int $0x13; setc %%al; popfl"
+		     : "+a" (ax), "+c" (cx), "+d" (dx), "+b" (bx)
+		     : : "esi", "edi", "memory");
 
 	return -(u8)ax;		/* 0 or -1 */
 }
 
-static u32 read_mbr_sig(u8 devno, struct edd_info *ei)
+static u32 read_mbr_sig(u8 devno, struct edd_info *ei, u32 *mbrsig)
 {
 	int sector_size;
 	char *mbrbuf_ptr, *mbrbuf_end;
-	u32 mbrsig;
 	u32 buf_base, mbr_base;
 	extern char _end[];
 
@@ -85,15 +56,15 @@ static u32 read_mbr_sig(u8 devno, struct edd_info *ei)
 
 	/* Make sure we actually have space on the heap... */
 	if (!(boot_params.hdr.loadflags & CAN_USE_HEAP))
-		return 0;
+		return -1;
 	if (mbrbuf_end > (char *)(size_t)boot_params.hdr.heap_end_ptr)
-		return 0;
+		return -1;
 
 	if (read_mbr(devno, mbrbuf_ptr))
-		return 0;
+		return -1;
 
-	mbrsig = *(u32 *)&mbrbuf_ptr[EDD_MBR_SIG_OFFSET];
-	return mbrsig;
+	*mbrsig = *(u32 *)&mbrbuf_ptr[EDD_MBR_SIG_OFFSET];
+	return 0;
 }
 
 static int get_edd_info(u8 devno, struct edd_info *ei)
@@ -160,6 +131,7 @@ void query_edd(void)
 	int do_edd = 1;
 	int devno;
 	struct edd_info ei, *edp;
+	u32 *mbrptr;
 
 	if (cmdline_find_option("edd", eddarg, sizeof eddarg) > 0) {
 		if (!strcmp(eddarg, "skipmbr") || !strcmp(eddarg, "skip"))
@@ -168,7 +140,8 @@ void query_edd(void)
 			do_edd = 0;
 	}
 
-	edp = (struct edd_info *)boot_params.eddbuf;
+	edp    = boot_params.eddbuf;
+	mbrptr = boot_params.edd_mbr_sig_buffer;
 
 	if (!do_edd)
 		return;
@@ -186,11 +159,8 @@ void query_edd(void)
 			boot_params.eddbuf_entries++;
 		}
 
-		if (do_mbr) {
-			u32 mbr_sig;
-			mbr_sig = read_mbr_sig(devno, &ei);
-			boot_params.edd_mbr_sig_buffer[devno-0x80] = mbr_sig;
-		}
+		if (do_mbr && !read_mbr_sig(devno, &ei, mbrptr++))
+			boot_params.edd_mbr_sig_buf_entries = devno-0x80+1;
 	}
 }
 
diff --git a/arch/i386/boot/tty.c b/arch/i386/boot/tty.c
index 9c668aad351..f3f14bd2637 100644
--- a/arch/i386/boot/tty.c
+++ b/arch/i386/boot/tty.c
@@ -54,9 +54,9 @@ static u8 gettime(void)
 	u16 ax = 0x0200;
 	u16 cx, dx;
 
-	asm("int $0x1a"
-	    : "+a" (ax), "=c" (cx), "=d" (dx)
-	    : : "ebx", "esi", "edi");
+	asm volatile("int $0x1a"
+		     : "+a" (ax), "=c" (cx), "=d" (dx)
+		     : : "ebx", "esi", "edi");
 
 	return dx >> 8;
 }
@@ -67,7 +67,7 @@ static u8 gettime(void)
 int getchar(void)
 {
 	u16 ax = 0;
-	asm("int $0x16" : "+a" (ax));
+	asm volatile("int $0x16" : "+a" (ax));
 
 	return ax & 0xff;
 }
@@ -75,9 +75,9 @@ int getchar(void)
 static int kbd_pending(void)
 {
 	u8 pending;
-	asm("int $0x16; setnz %0"
-	    : "=rm" (pending)
-	    : "a" (0x0100));
+	asm volatile("int $0x16; setnz %0"
+		     : "=rm" (pending)
+		     : "a" (0x0100));
 	return pending;
 }
 
diff --git a/arch/i386/boot/video-vga.c b/arch/i386/boot/video-vga.c
index 700d09a9c9b..aef02f9ec0c 100644
--- a/arch/i386/boot/video-vga.c
+++ b/arch/i386/boot/video-vga.c
@@ -47,16 +47,16 @@ static u8 vga_set_basic_mode(void)
 
 #ifdef CONFIG_VIDEO_400_HACK
 	if (adapter >= ADAPTER_VGA) {
-		asm(INT10
-		    : : "a" (0x1202), "b" (0x0030)
-		    : "ecx", "edx", "esi", "edi");
+		asm volatile(INT10
+			     : : "a" (0x1202), "b" (0x0030)
+			     : "ecx", "edx", "esi", "edi");
 	}
 #endif
 
 	ax = 0x0f00;
-	asm(INT10
-	    : "+a" (ax)
-	    : : "ebx", "ecx", "edx", "esi", "edi");
+	asm volatile(INT10
+		     : "+a" (ax)
+		     : : "ebx", "ecx", "edx", "esi", "edi");
 
 	mode = (u8)ax;
 
@@ -73,9 +73,10 @@ static u8 vga_set_basic_mode(void)
 		mode = 3;
 
 	/* Set the mode */
+	ax = mode;
 	asm volatile(INT10
-		     : : "a" (mode)
-		     : "ebx", "ecx", "edx", "esi", "edi");
+		     : "+a" (ax)
+		     : : "ebx", "ecx", "edx", "esi", "edi");
 	do_restore = 1;
 	return mode;
 }
diff --git a/arch/i386/boot/video.c b/arch/i386/boot/video.c
index 958130ef004..693f20d3102 100644
--- a/arch/i386/boot/video.c
+++ b/arch/i386/boot/video.c
@@ -61,7 +61,7 @@ static void store_video_mode(void)
 
 	/* Not all BIOSes are clean with respect to the top bit */
 	boot_params.screen_info.orig_video_mode = ax & 0x7f;
-	boot_params.screen_info.orig_video_page = page;
+	boot_params.screen_info.orig_video_page = page >> 8;
 }
 
 /*
diff --git a/arch/i386/kernel/alternative.c b/arch/i386/kernel/alternative.c
index 1b66d5c70ea..9f4ac8b02de 100644
--- a/arch/i386/kernel/alternative.c
+++ b/arch/i386/kernel/alternative.c
@@ -366,6 +366,8 @@ void apply_paravirt(struct paravirt_patch_site *start,
 		unsigned int used;
 
 		BUG_ON(p->len > MAX_PATCH_LEN);
+		/* prep the buffer with the original instructions */
+		memcpy(insnbuf, p->instr, p->len);
 		used = paravirt_ops.patch(p->instrtype, p->clobbers, insnbuf,
 					  (unsigned long)p->instr, p->len);
 
diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c
index f9fff29e01a..3d67ae18d76 100644
--- a/arch/i386/kernel/apic.c
+++ b/arch/i386/kernel/apic.c
@@ -1085,7 +1085,7 @@ static int __init detect_init_APIC (void)
 	if (l & MSR_IA32_APICBASE_ENABLE)
 		mp_lapic_addr = l & MSR_IA32_APICBASE_BASE;
 
-	if (nmi_watchdog != NMI_NONE)
+	if (nmi_watchdog != NMI_NONE && nmi_watchdog != NMI_DISABLED)
 		nmi_watchdog = NMI_LOCAL_APIC;
 
 	printk(KERN_INFO "Found and enabled local APIC!\n");
diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c
index 4b8a8da4b2e..e2f4a1c6854 100644
--- a/arch/i386/kernel/io_apic.c
+++ b/arch/i386/kernel/io_apic.c
@@ -754,14 +754,6 @@ static int pirq_entries [MAX_PIRQS];
 static int pirqs_enabled;
 int skip_ioapic_setup;
 
-static int __init ioapic_setup(char *str)
-{
-	skip_ioapic_setup = 1;
-	return 1;
-}
-
-__setup("noapic", ioapic_setup);
-
 static int __init ioapic_pirq_setup(char *str)
 {
 	int i, max;
diff --git a/arch/i386/kernel/nmi.c b/arch/i386/kernel/nmi.c
index 99beac7f96c..8c1c965eb2a 100644
--- a/arch/i386/kernel/nmi.c
+++ b/arch/i386/kernel/nmi.c
@@ -77,7 +77,7 @@ static int __init check_nmi_watchdog(void)
 	unsigned int *prev_nmi_count;
 	int cpu;
 
-	if ((nmi_watchdog == NMI_NONE) || (nmi_watchdog == NMI_DEFAULT))
+	if ((nmi_watchdog == NMI_NONE) || (nmi_watchdog == NMI_DISABLED))
 		return 0;
 
 	if (!atomic_read(&nmi_active))
@@ -424,7 +424,7 @@ int proc_nmi_enabled(struct ctl_table *table, int write, struct file *file,
 	if (!!old_state == !!nmi_watchdog_enabled)
 		return 0;
 
-	if (atomic_read(&nmi_active) < 0) {
+	if (atomic_read(&nmi_active) < 0 || nmi_watchdog == NMI_DISABLED) {
 		printk( KERN_WARNING "NMI watchdog is permanently disabled\n");
 		return -EIO;
 	}
diff --git a/arch/i386/kernel/tsc.c b/arch/i386/kernel/tsc.c
index debd7dbb415..a39280b4dd3 100644
--- a/arch/i386/kernel/tsc.c
+++ b/arch/i386/kernel/tsc.c
@@ -292,7 +292,6 @@ static struct clocksource clocksource_tsc = {
 
 void mark_tsc_unstable(char *reason)
 {
-	sched_clock_unstable_event();
 	if (!tsc_unstable) {
 		tsc_unstable = 1;
 		tsc_enabled = 0;
diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c
index 01ffdd4964f..fcb38e7f354 100644
--- a/arch/i386/mm/fault.c
+++ b/arch/i386/mm/fault.c
@@ -249,9 +249,10 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
 	pmd_k = pmd_offset(pud_k, address);
 	if (!pmd_present(*pmd_k))
 		return NULL;
-	if (!pmd_present(*pmd))
+	if (!pmd_present(*pmd)) {
 		set_pmd(pmd, *pmd_k);
-	else
+		arch_flush_lazy_mmu_mode();
+	} else
 		BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
 	return pmd_k;
 }
diff --git a/arch/i386/xen/xen-head.S b/arch/i386/xen/xen-head.S
index bc71f3bc401..f8d6937db2e 100644
--- a/arch/i386/xen/xen-head.S
+++ b/arch/i386/xen/xen-head.S
@@ -7,20 +7,20 @@
 #include <asm/boot.h>
 #include <xen/interface/elfnote.h>
 
-	.section .init.text
+.pushsection .init.text
 ENTRY(startup_xen)
 	movl %esi,xen_start_info
 	cld
 	movl $(init_thread_union+THREAD_SIZE),%esp
 	jmp xen_start_kernel
+.popsection
 
-.pushsection ".bss.page_aligned"
+.pushsection .bss.page_aligned
 	.align PAGE_SIZE_asm
 ENTRY(hypercall_page)
 	.skip 0x1000
 .popsection
 
-	.section .text
 	ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS,       .asciz "linux")
 	ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION,  .asciz "2.6")
 	ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION,    .asciz "xen-3.0")