Merge tag 'v3.15-rc1' into patchwork

Linux 3.15-rc1

* tag 'v3.15-rc1': (12180 commits)
  Linux 3.15-rc1
  mm: Initialize error in shmem_file_aio_read()
  cifs: Use min_t() when comparing "size_t" and "unsigned long"
  sym53c8xx_2: Set DID_REQUEUE return code when aborting squeue
  powerpc: Don't try to set LPCR unless we're in hypervisor mode
  futex: update documentation for ordering guarantees
  ceph: fix pr_fmt() redefinition
  vti: don't allow to add the same tunnel twice
  gre: don't allow to add the same tunnel twice
  drivers: net: xen-netfront: fix array initialization bug
  missing bits of "splice: fix racy pipe->buffers uses"
  cifs: fix the race in cifs_writev()
  ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure
  pktgen: be friendly to LLTX devices
  r8152: check RTL8152_UNPLUG
  net: sun4i-emac: add promiscuous support
  net/apne: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
  blackfin: cleanup board files
  bf609: clock: drop unused clock bit set/clear functions
  Blackfin: bf537: rename "CONFIG_ADT75"
  ...

1 files changed, 44 insertions, 8 deletions

diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index de91f3ae631e..94908af308d8 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -73,7 +73,7 @@ static struct aligninfo aligninfo[128] = {
 	{ 8, LD+F },		/* 00 0 1001: lfd */
 	{ 4, ST+F+S },		/* 00 0 1010: stfs */
 	{ 8, ST+F },		/* 00 0 1011: stfd */
-	INVALID,		/* 00 0 1100 */
+	{ 16, LD },		/* 00 0 1100: lq */
 	{ 8, LD },		/* 00 0 1101: ld/ldu/lwa */
 	INVALID,		/* 00 0 1110 */
 	{ 8, ST },		/* 00 0 1111: std/stdu */
@@ -140,7 +140,7 @@ static struct aligninfo aligninfo[128] = {
 	{ 2, LD+SW },		/* 10 0 1100: lhbrx */
 	{ 4, LD+SE },		/* 10 0 1101  lwa */
 	{ 2, ST+SW },		/* 10 0 1110: sthbrx */
-	INVALID,		/* 10 0 1111 */
+	{ 16, ST },		/* 10 0 1111: stq */
 	INVALID,		/* 10 1 0000 */
 	INVALID,		/* 10 1 0001 */
 	INVALID,		/* 10 1 0010 */
@@ -385,8 +385,6 @@ static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg,
 	char *ptr1 = (char *) &current->thread.TS_FPR(reg+1);
 	int i, ret, sw = 0;
 
-	if (!(flags & F))
-		return 0;
 	if (reg & 1)
 		return 0;	/* invalid form: FRS/FRT must be even */
 	if (flags & SW)
@@ -406,6 +404,34 @@ static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg,
 	return 1;	/* exception handled and fixed up */
 }
 
+#ifdef CONFIG_PPC64
+static int emulate_lq_stq(struct pt_regs *regs, unsigned char __user *addr,
+			  unsigned int reg, unsigned int flags)
+{
+	char *ptr0 = (char *)&regs->gpr[reg];
+	char *ptr1 = (char *)&regs->gpr[reg+1];
+	int i, ret, sw = 0;
+
+	if (reg & 1)
+		return 0;	/* invalid form: GPR must be even */
+	if (flags & SW)
+		sw = 7;
+	ret = 0;
+	for (i = 0; i < 8; ++i) {
+		if (!(flags & ST)) {
+			ret |= __get_user(ptr0[i^sw], addr + i);
+			ret |= __get_user(ptr1[i^sw], addr + i + 8);
+		} else {
+			ret |= __put_user(ptr0[i^sw], addr + i);
+			ret |= __put_user(ptr1[i^sw], addr + i + 8);
+		}
+	}
+	if (ret)
+		return -EFAULT;
+	return 1;	/* exception handled and fixed up */
+}
+#endif /* CONFIG_PPC64 */
+
 #ifdef CONFIG_SPE
 
 static struct aligninfo spe_aligninfo[32] = {
@@ -914,10 +940,20 @@ int fix_alignment(struct pt_regs *regs)
 		flush_fp_to_thread(current);
 	}
 
-	/* Special case for 16-byte FP loads and stores */
-	if (nb == 16) {
-		PPC_WARN_ALIGNMENT(fp_pair, regs);
-		return emulate_fp_pair(addr, reg, flags);
+	if ((nb == 16)) {
+		if (flags & F) {
+			/* Special case for 16-byte FP loads and stores */
+			PPC_WARN_ALIGNMENT(fp_pair, regs);
+			return emulate_fp_pair(addr, reg, flags);
+		} else {
+#ifdef CONFIG_PPC64
+			/* Special case for 16-byte loads and stores */
+			PPC_WARN_ALIGNMENT(lq_stq, regs);
+			return emulate_lq_stq(regs, addr, reg, flags);
+#else
+			return 0;
+#endif
+		}
 	}
 
 	PPC_WARN_ALIGNMENT(unaligned, regs);