---

yaml
---
r: 34008
b: refs/heads/master
c: 4ed4b54
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5c2d97cb31fb77981797fec46230ca005b865799
+refs/heads/master: 4ed4b5475211fab6a0ad00eed2f9297395e7598e

trunk/Documentation/kernel-parameters.txt

@@ -1189,8 +1189,6 @@ running once the system is up.
 				Mechanism 2.
 		nommconf	[IA-32,X86_64] Disable use of MMCONFIG for PCI
 				Configuration
-		mmconf		[IA-32,X86_64] Force MMCONFIG. This is useful
-				to override the builtin blacklist.
 		nomsi		[MSI] If the PCI_MSI kernel config parameter is
 				enabled, this kernel boot option can be used to
 				disable the use of MSI interrupts system-wide.

trunk/Makefile

@@ -1082,6 +1082,7 @@ help:
 	@echo  'Static analysers'
 	@echo  '  checkstack      - Generate a list of stack hogs'
 	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
+	@echo  '  headers_check   - Sanity check on exported headers'
 	@echo  ''
 	@echo  'Kernel packaging:'
 	@$(MAKE) $(build)=$(package-dir) help

trunk/arch/i386/kernel/setup.c

@@ -956,6 +956,38 @@ efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
 	return 0;
 }
 
+ /*
+  * This function checks if the entire range <start,end> is mapped with type.
+  *
+  * Note: this function only works correct if the e820 table is sorted and
+  * not-overlapping, which is the case
+  */
+int __init
+e820_all_mapped(unsigned long s, unsigned long e, unsigned type)
+{
+	u64 start = s;
+	u64 end = e;
+	int i;
+	for (i = 0; i < e820.nr_map; i++) {
+		struct e820entry *ei = &e820.map[i];
+		if (type && ei->type != type)
+			continue;
+		/* is the region (part) in overlap with the current region ?*/
+		if (ei->addr >= end || ei->addr + ei->size <= start)
+			continue;
+		/* if the region is at the beginning of <start,end> we move
+		 * start to the end of the region since it's ok until there
+		 */
+		if (ei->addr <= start)
+			start = ei->addr + ei->size;
+		/* if start is now at or beyond end, we're done, full
+		 * coverage */
+		if (start >= end)
+			return 1; /* we're done */
+	}
+	return 0;
+}
+
 /*
  * Find the highest page frame number we have available
  */

trunk/arch/i386/pci/common.c

@@ -237,11 +237,6 @@ char * __devinit  pcibios_setup(char *str)
 		pci_probe &= ~PCI_PROBE_MMCONF;
 		return NULL;
 	}
-	/* override DMI blacklist */
-	else if (!strcmp(str, "mmconf")) {
-		pci_probe |= PCI_PROBE_MMCONF_FORCE;
-		return NULL;
-	}
 #endif
 	else if (!strcmp(str, "noacpi")) {
 		acpi_noirq_set();

trunk/arch/i386/pci/mmconfig.c

@@ -12,7 +12,6 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/acpi.h>
-#include <linux/dmi.h>
 #include <asm/e820.h>
 #include "pci.h"
 
@@ -188,31 +187,9 @@ static __init void unreachable_devices(void)
 	}
 }
 
-static int disable_mcfg(struct dmi_system_id *d)
-{
-	printk("PCI: %s detected. Disabling MCFG.\n", d->ident);
-	pci_probe &= ~PCI_PROBE_MMCONF;
-	return 0;
-}
-
-static struct dmi_system_id __initdata dmi_bad_mcfg[] = {
-	/* Has broken MCFG table that makes the system hang when used */
-        {
-         .callback = disable_mcfg,
-         .ident = "Intel D3C5105 SDV",
-         .matches = {
-                     DMI_MATCH(DMI_BIOS_VENDOR, "Intel"),
-                     DMI_MATCH(DMI_BOARD_NAME, "D26928"),
-                     },
-         },
-         {}
-};
-
 void __init pci_mmcfg_init(void)
 {
-	dmi_check_system(dmi_bad_mcfg);
-
-	if ((pci_probe & (PCI_PROBE_MMCONF_FORCE|PCI_PROBE_MMCONF)) == 0)
+	if ((pci_probe & PCI_PROBE_MMCONF) == 0)
 		return;
 
 	acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
@@ -221,6 +198,15 @@ void __init pci_mmcfg_init(void)
 	    (pci_mmcfg_config[0].base_address == 0))
 		return;
 
+	if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
+			pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
+			E820_RESERVED)) {
+		printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",
+				pci_mmcfg_config[0].base_address);
+		printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
+		return;
+	}
+
 	printk(KERN_INFO "PCI: Using MMCONFIG\n");
 	raw_pci_ops = &pci_mmcfg;
 	pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;

trunk/arch/i386/pci/pci.h

@@ -16,8 +16,7 @@
 #define PCI_PROBE_CONF1		0x0002
 #define PCI_PROBE_CONF2		0x0004
 #define PCI_PROBE_MMCONF	0x0008
-#define PCI_PROBE_MMCONF_FORCE	0x0010
-#define PCI_PROBE_MASK		0x00ff
+#define PCI_PROBE_MASK		0x000f
 
 #define PCI_NO_SORT		0x0100
 #define PCI_BIOS_SORT		0x0200

trunk/arch/x86_64/kernel/e820.c

@@ -108,6 +108,35 @@ e820_any_mapped(unsigned long start, unsigned long end, unsigned type)
 	return 0;
 }
 
+/*
+ * This function checks if the entire range <start,end> is mapped with type.
+ *
+ * Note: this function only works correct if the e820 table is sorted and
+ * not-overlapping, which is the case
+ */
+int __init e820_all_mapped(unsigned long start, unsigned long end, unsigned type)
+{
+	int i;
+	for (i = 0; i < e820.nr_map; i++) {
+		struct e820entry *ei = &e820.map[i];
+		if (type && ei->type != type)
+			continue;
+		/* is the region (part) in overlap with the current region ?*/
+		if (ei->addr >= end || ei->addr + ei->size <= start)
+			continue;
+
+		/* if the region is at the beginning of <start,end> we move
+		 * start to the end of the region since it's ok until there
+		 */
+		if (ei->addr <= start)
+			start = ei->addr + ei->size;
+		/* if start is now at or beyond end, we're done, full coverage */
+		if (start >= end)
+			return 1; /* we're done */
+	}
+	return 0;
+}
+
 /* 
  * Find a free area in a specific range. 
  */ 

trunk/arch/x86_64/pci/mmconfig.c

@@ -9,7 +9,6 @@
 #include <linux/init.h>
 #include <linux/acpi.h>
 #include <linux/bitmap.h>
-#include <linux/dmi.h>
 #include <asm/e820.h>
 
 #include "pci.h"
@@ -165,33 +164,11 @@ static __init void unreachable_devices(void)
 	}
 }
 
-static int disable_mcfg(struct dmi_system_id *d)
-{
-	printk("PCI: %s detected. Disabling MCFG.\n", d->ident);
-	pci_probe &= ~PCI_PROBE_MMCONF;
-	return 0;
-}
-
-static struct dmi_system_id __initdata dmi_bad_mcfg[] = {
-	/* Has broken MCFG table that makes the system hang when used */
-        {
-         .callback = disable_mcfg,
-         .ident = "Intel D3C5105 SDV",
-         .matches = {
-                     DMI_MATCH(DMI_BIOS_VENDOR, "Intel"),
-                     DMI_MATCH(DMI_BOARD_NAME, "D26928"),
-                     },
-         },
-         {}
-};
-
 void __init pci_mmcfg_init(void)
 {
 	int i;
 
-	dmi_check_system(dmi_bad_mcfg);
-
-	if ((pci_probe & (PCI_PROBE_MMCONF|PCI_PROBE_MMCONF_FORCE)) == 0)
+	if ((pci_probe & PCI_PROBE_MMCONF) == 0)
 		return;
 
 	acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
@@ -200,6 +177,15 @@ void __init pci_mmcfg_init(void)
 	    (pci_mmcfg_config[0].base_address == 0))
 		return;
 
+	if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
+			pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
+			E820_RESERVED)) {
+		printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",
+				pci_mmcfg_config[0].base_address);
+		printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
+		return;
+	}
+
 	/* RED-PEN i386 doesn't do _nocache right now */
 	pci_mmcfg_virt = kmalloc(sizeof(*pci_mmcfg_virt) * pci_mmcfg_config_num, GFP_KERNEL);
 	if (pci_mmcfg_virt == NULL) {

trunk/drivers/mtd/chips/cfi_cmdset_0001.c

@@ -908,7 +908,7 @@ static void __xipram xip_enable(struct map_info *map, struct flchip *chip,
 
 static int __xipram xip_wait_for_operation(
 		struct map_info *map, struct flchip *chip,
-		unsigned long adr, int *chip_op_time )
+		unsigned long adr, unsigned int chip_op_time )
 {
 	struct cfi_private *cfi = map->fldrv_priv;
 	struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
@@ -917,7 +917,7 @@ static int __xipram xip_wait_for_operation(
 	flstate_t oldstate, newstate;
 
        	start = xip_currtime();
-	usec = *chip_op_time * 8;
+	usec = chip_op_time * 8;
 	if (usec == 0)
 		usec = 500000;
 	done = 0;
@@ -1027,8 +1027,8 @@ static int __xipram xip_wait_for_operation(
 #define XIP_INVAL_CACHED_RANGE(map, from, size)  \
 	INVALIDATE_CACHED_RANGE(map, from, size)
 
-#define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, p_usec) \
-	xip_wait_for_operation(map, chip, cmd_adr, p_usec)
+#define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, usec) \
+	xip_wait_for_operation(map, chip, cmd_adr, usec)
 
 #else
 
@@ -1040,64 +1040,64 @@ static int __xipram xip_wait_for_operation(
 static int inval_cache_and_wait_for_operation(
 		struct map_info *map, struct flchip *chip,
 		unsigned long cmd_adr, unsigned long inval_adr, int inval_len,
-		int *chip_op_time )
+		unsigned int chip_op_time)
 {
 	struct cfi_private *cfi = map->fldrv_priv;
 	map_word status, status_OK = CMD(0x80);
-	int z, chip_state = chip->state;
-	unsigned long timeo;
+	int chip_state = chip->state;
+	unsigned int timeo, sleep_time;
 
 	spin_unlock(chip->mutex);
 	if (inval_len)
 		INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len);
-	if (*chip_op_time)
-		cfi_udelay(*chip_op_time);
 	spin_lock(chip->mutex);
 
-	timeo = *chip_op_time * 8 * HZ / 1000000;
-	if (timeo < HZ/2)
-		timeo = HZ/2;
-	timeo += jiffies;
+	/* set our timeout to 8 times the expected delay */
+	timeo = chip_op_time * 8;
+	if (!timeo)
+		timeo = 500000;
+	sleep_time = chip_op_time / 2;
 
-	z = 0;
 	for (;;) {
-		if (chip->state != chip_state) {
-			/* Someone's suspended the operation: sleep */
-			DECLARE_WAITQUEUE(wait, current);
-
-			set_current_state(TASK_UNINTERRUPTIBLE);
-			add_wait_queue(&chip->wq, &wait);
-			spin_unlock(chip->mutex);
-			schedule();
-			remove_wait_queue(&chip->wq, &wait);
-			timeo = jiffies + (HZ / 2); /* FIXME */
-			spin_lock(chip->mutex);
-			continue;
-		}
-
 		status = map_read(map, cmd_adr);
 		if (map_word_andequal(map, status, status_OK, status_OK))
 			break;
 
-		/* OK Still waiting */
-		if (time_after(jiffies, timeo)) {
+		if (!timeo) {
 			map_write(map, CMD(0x70), cmd_adr);
 			chip->state = FL_STATUS;
 			return -ETIME;
 		}
 
-		/* Latency issues. Drop the lock, wait a while and retry */
-		z++;
+		/* OK Still waiting. Drop the lock, wait a while and retry. */
 		spin_unlock(chip->mutex);
-		cfi_udelay(1);
+		if (sleep_time >= 1000000/HZ) {
+			/*
+			 * Half of the normal delay still remaining
+			 * can be performed with a sleeping delay instead
+			 * of busy waiting.
+			 */
+			msleep(sleep_time/1000);
+			timeo -= sleep_time;
+			sleep_time = 1000000/HZ;
+		} else {
+			udelay(1);
+			cond_resched();
+			timeo--;
+		}
 		spin_lock(chip->mutex);
-	}
 
-	if (!z) {
-		if (!--(*chip_op_time))
-			*chip_op_time = 1;
-	} else if (z > 1)
-		++(*chip_op_time);
+		if (chip->state != chip_state) {
+			/* Someone's suspended the operation: sleep */
+			DECLARE_WAITQUEUE(wait, current);
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			spin_unlock(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			spin_lock(chip->mutex);
+		}
+	}
 
 	/* Done and happy. */
  	chip->state = FL_STATUS;
@@ -1107,8 +1107,7 @@ static int inval_cache_and_wait_for_operation(
 #endif
 
 #define WAIT_TIMEOUT(map, chip, adr, udelay) \
-	({ int __udelay = (udelay); \
-	   INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, &__udelay); })
+	INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, udelay);
 
 
 static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len)
@@ -1332,7 +1331,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
 
 	ret = INVAL_CACHE_AND_WAIT(map, chip, adr,
 				   adr, map_bankwidth(map),
-				   &chip->word_write_time);
+				   chip->word_write_time);
 	if (ret) {
 		xip_enable(map, chip, adr);
 		printk(KERN_ERR "%s: word write error (status timeout)\n", map->name);
@@ -1569,7 +1568,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
 
 	ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr,
 				   adr, len,
-				   &chip->buffer_write_time);
+				   chip->buffer_write_time);
 	if (ret) {
 		map_write(map, CMD(0x70), cmd_adr);
 		chip->state = FL_STATUS;
@@ -1704,7 +1703,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
 
 	ret = INVAL_CACHE_AND_WAIT(map, chip, adr,
 				   adr, len,
-				   &chip->erase_time);
+				   chip->erase_time);
 	if (ret) {
 		map_write(map, CMD(0x70), adr);
 		chip->state = FL_STATUS;