---

yaml
---
r: 65239
b: refs/heads/master
c: ca074a3
h: refs/heads/master
i:
  65237: 319f6ae
  65235: 54b28c3
  65231: 690bfea
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cf8dc57cbac0fe089308f57c333ab763c36782ff
+refs/heads/master: ca074a33928762c65e261dd94006c1b6a47e46fa

trunk/Documentation/devices.txt

@@ -94,8 +94,6 @@ Your cooperation is appreciated.
 		  9 = /dev/urandom	Faster, less secure random number gen.
 		 10 = /dev/aio		Asynchronous I/O notification interface
 		 11 = /dev/kmsg		Writes to this come out as printk's
-		 12 = /dev/oldmem	Used by crashdump kernels to access
-					the memory of the kernel that crashed.
 
   1 block	RAM disk
 		  0 = /dev/ram0		First RAM disk

trunk/arch/arm/kernel/bios32.c

@@ -338,7 +338,7 @@ pbus_assign_bus_resources(struct pci_bus *bus, struct pci_sys_data *root)
  * pcibios_fixup_bus - Called after each bus is probed,
  * but before its children are examined.
  */
-void pcibios_fixup_bus(struct pci_bus *bus)
+void __devinit pcibios_fixup_bus(struct pci_bus *bus)
 {
 	struct pci_sys_data *root = bus->sysdata;
 	struct pci_dev *dev;
@@ -419,7 +419,7 @@ void pcibios_fixup_bus(struct pci_bus *bus)
 /*
  * Convert from Linux-centric to bus-centric addresses for bridge devices.
  */
-void
+void __devinit
 pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
 			 struct resource *res)
 {

trunk/arch/x86_64/vdso/voffset.h

@@ -1 +1 @@
-#define VDSO_TEXT_OFFSET 0x600
+#define VDSO_TEXT_OFFSET 0x500

trunk/drivers/char/vt_ioctl.c

@@ -770,7 +770,6 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
 		/*
 		 * Switching-from response
 		 */
-		acquire_console_sem();
 		if (vc->vt_newvt >= 0) {
 			if (arg == 0)
 				/*
@@ -785,6 +784,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
 				 * complete the switch.
 				 */
 				int newvt;
+				acquire_console_sem();
 				newvt = vc->vt_newvt;
 				vc->vt_newvt = -1;
 				i = vc_allocate(newvt);
@@ -798,6 +798,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
 				 * other console switches..
 				 */
 				complete_change_console(vc_cons[newvt].d);
+				release_console_sem();
 			}
 		}
 
@@ -809,12 +810,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
 			/*
 			 * If it's just an ACK, ignore it
 			 */
-			if (arg != VT_ACKACQ) {
-				release_console_sem();
+			if (arg != VT_ACKACQ)
 				return -EINVAL;
-			}
 		}
-		release_console_sem();
 
 		return 0;
 
@@ -1210,18 +1208,15 @@ void change_console(struct vc_data *new_vc)
 		/*
 		 * Send the signal as privileged - kill_pid() will
 		 * tell us if the process has gone or something else
-		 * is awry.
-		 *
-		 * We need to set vt_newvt *before* sending the signal or we
-		 * have a race.
+		 * is awry
 		 */
-		vc->vt_newvt = new_vc->vc_num;
 		if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) {
 			/*
 			 * It worked. Mark the vt to switch to and
 			 * return. The process needs to send us a
 			 * VT_RELDISP ioctl to complete the switch.
 			 */
+			vc->vt_newvt = new_vc->vc_num;
 			return;
 		}
 

trunk/drivers/media/video/ivtv/ivtv-fileops.c

@@ -754,11 +754,9 @@ static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts)
 		ivtv_yuv_close(itv);
 	}
 	if (s->type == IVTV_DEC_STREAM_TYPE_YUV && itv->output_mode == OUT_YUV)
-		itv->output_mode = OUT_NONE;
-	else if (s->type == IVTV_DEC_STREAM_TYPE_YUV && itv->output_mode == OUT_UDMA_YUV)
-		itv->output_mode = OUT_NONE;
+	    itv->output_mode = OUT_NONE;
 	else if (s->type == IVTV_DEC_STREAM_TYPE_MPG && itv->output_mode == OUT_MPG)
-		itv->output_mode = OUT_NONE;
+	    itv->output_mode = OUT_NONE;
 
 	itv->speed = 0;
 	clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags);

trunk/drivers/net/mv643xx_eth.c

@@ -534,7 +534,7 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id)
 	}
 
 	/* PHY status changed */
-	if (eth_int_cause_ext & (ETH_INT_CAUSE_PHY | ETH_INT_CAUSE_STATE)) {
+	if (eth_int_cause_ext & ETH_INT_CAUSE_PHY) {
 		struct ethtool_cmd cmd;
 
 		if (mii_link_ok(&mp->mii)) {

trunk/drivers/net/mv643xx_eth.h

@@ -64,9 +64,7 @@
 #define ETH_INT_CAUSE_TX_ERROR	(ETH_TX_QUEUES_ENABLED << 8)
 #define ETH_INT_CAUSE_TX	(ETH_INT_CAUSE_TX_DONE | ETH_INT_CAUSE_TX_ERROR)
 #define ETH_INT_CAUSE_PHY	0x00010000
-#define ETH_INT_CAUSE_STATE	0x00100000
-#define ETH_INT_UNMASK_ALL_EXT	(ETH_INT_CAUSE_TX | ETH_INT_CAUSE_PHY | \
-					ETH_INT_CAUSE_STATE)
+#define ETH_INT_UNMASK_ALL_EXT	(ETH_INT_CAUSE_TX | ETH_INT_CAUSE_PHY)
 
 #define ETH_INT_MASK_ALL	0x00000000
 #define ETH_INT_MASK_ALL_EXT	0x00000000

trunk/drivers/net/wireless/Makefile

@@ -43,7 +43,7 @@ obj-$(CONFIG_PCMCIA_RAYCS)	+= ray_cs.o
 obj-$(CONFIG_PCMCIA_WL3501)	+= wl3501_cs.o
 
 obj-$(CONFIG_USB_ZD1201)	+= zd1201.o
-obj-$(CONFIG_LIBERTAS)		+= libertas/
+obj-$(CONFIG_LIBERTAS_USB)     += libertas/
 
 rtl8187-objs		:= rtl8187_dev.o rtl8187_rtl8225.o
 obj-$(CONFIG_RTL8187)	+= rtl8187.o

trunk/fs/splice.c

@@ -1223,33 +1223,6 @@ static long do_splice(struct file *in, loff_t __user *off_in,
 	return -EINVAL;
 }
 
-/*
- * Do a copy-from-user while holding the mmap_semaphore for reading, in a
- * manner safe from deadlocking with simultaneous mmap() (grabbing mmap_sem
- * for writing) and page faulting on the user memory pointed to by src.
- * This assumes that we will very rarely hit the partial != 0 path, or this
- * will not be a win.
- */
-static int copy_from_user_mmap_sem(void *dst, const void __user *src, size_t n)
-{
-	int partial;
-
-	pagefault_disable();
-	partial = __copy_from_user_inatomic(dst, src, n);
-	pagefault_enable();
-
-	/*
-	 * Didn't copy everything, drop the mmap_sem and do a faulting copy
-	 */
-	if (unlikely(partial)) {
-		up_read(&current->mm->mmap_sem);
-		partial = copy_from_user(dst, src, n);
-		down_read(&current->mm->mmap_sem);
-	}
-
-	return partial;
-}
-
 /*
  * Map an iov into an array of pages and offset/length tupples. With the
  * partial_page structure, we can map several non-contiguous ranges into
@@ -1263,26 +1236,31 @@ static int get_iovec_page_array(const struct iovec __user *iov,
 {
 	int buffers = 0, error = 0;
 
+	/*
+	 * It's ok to take the mmap_sem for reading, even
+	 * across a "get_user()".
+	 */
 	down_read(&current->mm->mmap_sem);
 
 	while (nr_vecs) {
 		unsigned long off, npages;
-		struct iovec entry;
 		void __user *base;
 		size_t len;
 		int i;
 
-		error = -EFAULT;
-		if (copy_from_user_mmap_sem(&entry, iov, sizeof(entry)))
+		/*
+		 * Get user address base and length for this iovec.
+		 */
+		error = get_user(base, &iov->iov_base);
+		if (unlikely(error))
+			break;
+		error = get_user(len, &iov->iov_len);
+		if (unlikely(error))
 			break;
-
-		base = entry.iov_base;
-		len = entry.iov_len;
 
 		/*
 		 * Sanity check this iovec. 0 read succeeds.
 		 */
-		error = 0;
 		if (unlikely(!len))
 			break;
 		error = -EFAULT;

trunk/fs/xfs/xfs_buf_item.h

@@ -52,6 +52,11 @@ typedef struct xfs_buf_log_format_t {
 #define	XFS_BLI_UDQUOT_BUF	0x4
 #define XFS_BLI_PDQUOT_BUF	0x8
 #define	XFS_BLI_GDQUOT_BUF	0x10
+/*
+ * This flag indicates that the buffer contains newly allocated
+ * inodes.
+ */
+#define	XFS_BLI_INODE_NEW_BUF	0x20
 
 #define	XFS_BLI_CHUNK		128
 #define	XFS_BLI_SHIFT		7

trunk/fs/xfs/xfs_log_recover.c

@@ -1874,6 +1874,7 @@ xlog_recover_do_inode_buffer(
 /*ARGSUSED*/
 STATIC void
 xlog_recover_do_reg_buffer(
+	xfs_mount_t		*mp,
 	xlog_recover_item_t	*item,
 	xfs_buf_t		*bp,
 	xfs_buf_log_format_t	*buf_f)
@@ -1884,6 +1885,50 @@ xlog_recover_do_reg_buffer(
 	unsigned int		*data_map = NULL;
 	unsigned int		map_size = 0;
 	int                     error;
+	int			stale_buf = 1;
+
+	/*
+	 * Scan through the on-disk inode buffer and attempt to
+	 * determine if it has been written to since it was logged.
+	 *
+	 * - If any of the magic numbers are incorrect then the buffer is stale
+	 * - If any of the modes are non-zero then the buffer is not stale
+	 * - If all of the modes are zero and at least one of the generation
+	 *   counts is non-zero then the buffer is stale
+	 *
+	 * If the end result is a stale buffer then the log buffer is replayed
+	 * otherwise it is skipped.
+	 *
+	 * This heuristic is not perfect.  It can be improved by scanning the
+	 * entire inode chunk for evidence that any of the inode clusters have
+	 * been updated.  To fix this problem completely we will need a major
+	 * architectural change to the logging system.
+	 */
+	if (buf_f->blf_flags & XFS_BLI_INODE_NEW_BUF) {
+		xfs_dinode_t    *dip;
+		int             inodes_per_buf;
+		int		mode_count = 0;
+		int		gen_count = 0;
+
+		stale_buf = 0;
+		inodes_per_buf = XFS_BUF_COUNT(bp) >> mp->m_sb.sb_inodelog;
+		for (i = 0; i < inodes_per_buf; i++) {
+			dip = (xfs_dinode_t *)xfs_buf_offset(bp,
+				i * mp->m_sb.sb_inodesize);
+			if (be16_to_cpu(dip->di_core.di_magic) !=
+					XFS_DINODE_MAGIC) {
+				stale_buf = 1;
+				break;
+			}
+			if (dip->di_core.di_mode)
+				mode_count++;
+			if (dip->di_core.di_gen)
+				gen_count++;
+		}
+
+		if (!mode_count && gen_count)
+			stale_buf = 1;
+	}
 
 	switch (buf_f->blf_type) {
 	case XFS_LI_BUF:
@@ -1917,7 +1962,7 @@ xlog_recover_do_reg_buffer(
 					       -1, 0, XFS_QMOPT_DOWARN,
 					       "dquot_buf_recover");
 		}
-		if (!error)
+		if (!error && stale_buf)
 			memcpy(xfs_buf_offset(bp,
 				(uint)bit << XFS_BLI_SHIFT),	/* dest */
 				item->ri_buf[i].i_addr,		/* source */
@@ -2089,7 +2134,7 @@ xlog_recover_do_dquot_buffer(
 	if (log->l_quotaoffs_flag & type)
 		return;
 
-	xlog_recover_do_reg_buffer(item, bp, buf_f);
+	xlog_recover_do_reg_buffer(mp, item, bp, buf_f);
 }
 
 /*
@@ -2190,7 +2235,7 @@ xlog_recover_do_buffer_trans(
 		  (XFS_BLI_UDQUOT_BUF|XFS_BLI_PDQUOT_BUF|XFS_BLI_GDQUOT_BUF)) {
 		xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f);
 	} else {
-		xlog_recover_do_reg_buffer(item, bp, buf_f);
+		xlog_recover_do_reg_buffer(mp, item, bp, buf_f);
 	}
 	if (error)
 		return XFS_ERROR(error);

trunk/fs/xfs/xfs_trans_buf.c

@@ -966,6 +966,7 @@ xfs_trans_inode_alloc_buf(
 	ASSERT(atomic_read(&bip->bli_refcount) > 0);
 
 	bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF;
+	bip->bli_format.blf_flags |= XFS_BLI_INODE_NEW_BUF;
 }
 
 

trunk/include/asm-i386/system.h

@@ -214,6 +214,11 @@ static inline unsigned long get_limit(unsigned long segment)
  */
 
 
+/* 
+ * Actually only lfence would be needed for mb() because all stores done 
+ * by the kernel should be already ordered. But keep a full barrier for now. 
+ */
+
 #define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
 #define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2)
 

trunk/include/asm-mips/fcntl.h

@@ -13,6 +13,7 @@
 #define O_SYNC		0x0010
 #define O_NONBLOCK	0x0080
 #define O_CREAT         0x0100	/* not fcntl */
+#define O_TRUNC		0x0200	/* not fcntl */
 #define O_EXCL		0x0400	/* not fcntl */
 #define O_NOCTTY	0x0800	/* not fcntl */
 #define FASYNC		0x1000	/* fcntl, for BSD compatibility */

trunk/kernel/futex.c

@@ -1943,10 +1943,9 @@ static inline int fetch_robust_entry(struct robust_list __user **entry,
 void exit_robust_list(struct task_struct *curr)
 {
 	struct robust_list_head __user *head = curr->robust_list;
-	struct robust_list __user *entry, *next_entry, *pending;
-	unsigned int limit = ROBUST_LIST_LIMIT, pi, next_pi, pip;
+	struct robust_list __user *entry, *pending;
+	unsigned int limit = ROBUST_LIST_LIMIT, pi, pip;
 	unsigned long futex_offset;
-	int rc;
 
 	/*
 	 * Fetch the list head (which was registered earlier, via
@@ -1966,13 +1965,11 @@ void exit_robust_list(struct task_struct *curr)
 	if (fetch_robust_entry(&pending, &head->list_op_pending, &pip))
 		return;
 
-	next_entry = NULL;	/* avoid warning with gcc */
+	if (pending)
+		handle_futex_death((void __user *)pending + futex_offset,
+				   curr, pip);
+
 	while (entry != &head->list) {
-		/*
-		 * Fetch the next entry in the list before calling
-		 * handle_futex_death:
-		 */
-		rc = fetch_robust_entry(&next_entry, &entry->next, &next_pi);
 		/*
 		 * A pending lock might already be on the list, so
 		 * don't process it twice:
@@ -1981,10 +1978,11 @@ void exit_robust_list(struct task_struct *curr)
 			if (handle_futex_death((void __user *)entry + futex_offset,
 						curr, pi))
 				return;
-		if (rc)
+		/*
+		 * Fetch the next entry in the list:
+		 */
+		if (fetch_robust_entry(&entry, &entry->next, &pi))
 			return;
-		entry = next_entry;
-		pi = next_pi;
 		/*
 		 * Avoid excessively long or circular lists:
 		 */
@@ -1993,10 +1991,6 @@ void exit_robust_list(struct task_struct *curr)
 
 		cond_resched();
 	}
-
-	if (pending)
-		handle_futex_death((void __user *)pending + futex_offset,
-				   curr, pip);
 }
 
 long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,