Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  Fix build of cpm_uart due to core changes
  powerpc/8xx: Fix regression introduced by cache coherency rewrite
  powerpc/4xx: Fix erroneous xmon warning on PowerPC 4xx
  powerpc/mm: Fix 40x and 8xx vs. _PAGE_SPECIAL
  powerpc: Cleanup linker script using new linker script macros.
  powerpc: Fix ibm,client-architecture-support printout
  powerpc: Increase NODES_SHIFT on 64bit from 4 to 8
  powerpc/perf_counter: Fix vdso detection
  powerpc: Move 64bit heap above 1TB on machines with 1TB segments
  powerpc: Change archdata dma_data to a union
  powerpc: Rename get_dma_direct_offset get_dma_offset
  powerpc/mm: Remove duplicated #include
  powerpc/book3e-64: Remove duplicated #include
  powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE
  powerpc/pmc: Don't access lppaca on Book3E
  powerpc: kmalloc failure ignored in vio_build_iommu_table()
  hvc_console: Provide (un)locked version for hvc_resize()

3 files changed, 17 insertions, 5 deletions

diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index 25ce15b..a632f25 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -678,7 +678,7 @@ int hvc_poll(struct hvc_struct *hp)
 EXPORT_SYMBOL_GPL(hvc_poll);
 
 /**
- * hvc_resize() - Update terminal window size information.
+ * __hvc_resize() - Update terminal window size information.
  * @hp:		HVC console pointer
  * @ws:		Terminal window size structure
  *
@@ -687,12 +687,12 @@ EXPORT_SYMBOL_GPL(hvc_poll);
  *
  * Locking:	Locking free; the function MUST be called holding hp->lock
  */
-void hvc_resize(struct hvc_struct *hp, struct winsize ws)
+void __hvc_resize(struct hvc_struct *hp, struct winsize ws)
 {
 	hp->ws = ws;
 	schedule_work(&hp->tty_resize);
 }
-EXPORT_SYMBOL_GPL(hvc_resize);
+EXPORT_SYMBOL_GPL(__hvc_resize);
 
 /*
  * This kthread is either polling or interrupt driven.  This is determined by
diff --git a/drivers/char/hvc_console.h b/drivers/char/hvc_console.h
index 3c85d78..10950ca 100644
--- a/drivers/char/hvc_console.h
+++ b/drivers/char/hvc_console.h
@@ -28,6 +28,7 @@
 #define HVC_CONSOLE_H
 #include <linux/kref.h>
 #include <linux/tty.h>
+#include <linux/spinlock.h>
 
 /*
  * This is the max number of console adapters that can/will be found as
@@ -88,7 +89,16 @@ int hvc_poll(struct hvc_struct *hp);
 void hvc_kick(void);
 
 /* Resize hvc tty terminal window */
-extern void hvc_resize(struct hvc_struct *hp, struct winsize ws);
+extern void __hvc_resize(struct hvc_struct *hp, struct winsize ws);
+
+static inline void hvc_resize(struct hvc_struct *hp, struct winsize ws)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&hp->lock, flags);
+	__hvc_resize(hp, ws);
+	spin_unlock_irqrestore(&hp->lock, flags);
+}
 
 /* default notifier for irq based notification */
 extern int notifier_add_irq(struct hvc_struct *hp, int data);
diff --git a/drivers/char/hvc_iucv.c b/drivers/char/hvc_iucv.c
index 0ecac7e..b8a5d65 100644
--- a/drivers/char/hvc_iucv.c
+++ b/drivers/char/hvc_iucv.c
@@ -273,7 +273,9 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
 	case MSG_TYPE_WINSIZE:
 		if (rb->mbuf->datalen != sizeof(struct winsize))
 			break;
-		hvc_resize(priv->hvc, *((struct winsize *) rb->mbuf->data));
+		/* The caller must ensure that the hvc is locked, which
+		 * is the case when called from hvc_iucv_get_chars() */
+		__hvc_resize(priv->hvc, *((struct winsize *) rb->mbuf->data));
 		break;
 
 	case MSG_TYPE_ERROR:	/* ignored ... */