Merge tag 'drm-intel-next-2013-07-26-fixed' of git://people.freedeskt…

…op.org/~danvet/drm-intel into drm-next

Neat that QA (and Ben) keeps on humming along while I'm on vacation, so
you already get the next feature pull request:
- proper eLLC support for HSW from Ben
- more interrupt refactoring
- add w/a tags where we implement them already (Damien)
- hangcheck fixes (Chris) + hangcheck stats (Mika)
- flesh out the new vm structs for ppgtt and ggtt (Ben)
- PSR for Haswell, still disabled by default (Rodrigo et al.)
- pc8+ refclock sequence code from Paulo
- more interrupt refactoring from Paulo, unifying ilk/snb with the ivb/hsw
  interrupt code
- full solution for the Haswell concurrent reg access issues (Chris)
- fix racy object accounting, used by some new leak tests
- fix sync polarity settings on ch7xxx dvo encoder
- random bits&pieces, little fixes and better debug output all over

[airlied: fix conflict with drm_mm cleanups]

* tag 'drm-intel-next-2013-07-26-fixed' of git://people.freedesktop.org/~danvet/drm-intel: (289 commits)
  drm/i915: Do not dereference NULL crtc or fb until after checking
  drm/i915: fix pnv display core clock readout out
  drm/i915: Replace open-coded offset_in_page()
  drm/i915: Retry DP aux_ch communications with a different clock after failure
  drm/i915: Add messages useful for HPD storm detection debugging (v2)
  drm/i915: dvo_ch7xxx: fix vsync polarity setting
  drm/i915: fix the racy object accounting
  drm/i915: Convert the register access tracepoint to be conditional
  drm/i915: Squash gen lookup through multiple indirections inside GT access
  drm/i915: Use the common register access functions for NOTRACE variants
  drm/i915: Use a private interface for register access within GT
  drm/i915: Colocate all GT access routines in the same file
  drm/i915: fix reference counting in i915_gem_create
  drm/i915: Use Graphics Base of Stolen Memory on all gen3+
  drm/i915: disable stolen mem for OVERLAY_NEEDS_PHYSICAL
  drm/i915: add functions to disable and restore LCPLL
  drm/i915: disable CLKOUT_DP when it's not needed
  drm/i915: extend lpt_enable_clkout_dp
  drm/i915: fix up error cleanup in i915_gem_object_bind_to_gtt
  drm/i915: Add some debug breadcrumbs to connector detection
  ...

Documentation/ABI/testing/sysfs-driver-xen-blkback

@@ -0,0 +1,17 @@
+What:           /sys/module/xen_blkback/parameters/max_buffer_pages
+Date:           March 2013
+KernelVersion:  3.11
+Contact:        Roger Pau Monné <roger.pau@citrix.com>
+Description:
+                Maximum number of free pages to keep in each block
+                backend buffer.
+
+What:           /sys/module/xen_blkback/parameters/max_persistent_grants
+Date:           March 2013
+KernelVersion:  3.11
+Contact:        Roger Pau Monné <roger.pau@citrix.com>
+Description:
+                Maximum number of grants to map persistently in
+                blkback. If the frontend tries to use more than
+                max_persistent_grants, the LRU kicks in and starts
+                removing 5% of max_persistent_grants every 100ms.

Documentation/ABI/testing/sysfs-driver-xen-blkfront

@@ -0,0 +1,10 @@
+What:           /sys/module/xen_blkfront/parameters/max
+Date:           June 2013
+KernelVersion:  3.11
+Contact:        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+Description:
+                Maximum number of segments that the frontend will negotiate
+                with the backend for indirect descriptors. The default value
+                is 32 - higher value means more potential throughput but more
+                memory usage. The backend picks the minimum of the frontend
+                and its default backend value.

Documentation/bcache.txt

@@ -46,29 +46,33 @@ you format your backing devices and cache device at the same time, you won't
 have to manually attach:
   make-bcache -B /dev/sda /dev/sdb -C /dev/sdc
 
-To make bcache devices known to the kernel, echo them to /sys/fs/bcache/register:
+bcache-tools now ships udev rules, and bcache devices are known to the kernel
+immediately.  Without udev, you can manually register devices like this:
 
   echo /dev/sdb > /sys/fs/bcache/register
   echo /dev/sdc > /sys/fs/bcache/register
 
-To register your bcache devices automatically, you could add something like
-this to an init script:
+Registering the backing device makes the bcache device show up in /dev; you can
+now format it and use it as normal. But the first time using a new bcache
+device, it'll be running in passthrough mode until you attach it to a cache.
+See the section on attaching.
 
-  echo /dev/sd* > /sys/fs/bcache/register_quiet
+The devices show up as:
 
-It'll look for bcache superblocks and ignore everything that doesn't have one.
+  /dev/bcache<N>
 
-Registering the backing device makes the bcache show up in /dev; you can now
-format it and use it as normal. But the first time using a new bcache device,
-it'll be running in passthrough mode until you attach it to a cache. See the
-section on attaching.
+As well as (with udev):
 
-The devices show up at /dev/bcacheN, and can be controlled via sysfs from
-/sys/block/bcacheN/bcache:
+  /dev/bcache/by-uuid/<uuid>
+  /dev/bcache/by-label/<label>
+
+To get started:
 
   mkfs.ext4 /dev/bcache0
   mount /dev/bcache0 /mnt
 
+You can control bcache devices through sysfs at /sys/block/bcache<N>/bcache .
+
 Cache devices are managed as sets; multiple caches per set isn't supported yet
 but will allow for mirroring of metadata and dirty data in the future. Your new
 cache set shows up as /sys/fs/bcache/<UUID>
@@ -80,11 +84,11 @@ must be attached to your cache set to enable caching. Attaching a backing
 device to a cache set is done thusly, with the UUID of the cache set in
 /sys/fs/bcache:
 
-  echo <UUID> > /sys/block/bcache0/bcache/attach
+  echo <CSET-UUID> > /sys/block/bcache0/bcache/attach
 
 This only has to be done once. The next time you reboot, just reregister all
 your bcache devices. If a backing device has data in a cache somewhere, the
-/dev/bcache# device won't be created until the cache shows up - particularly
+/dev/bcache<N> device won't be created until the cache shows up - particularly
 important if you have writeback caching turned on.
 
 If you're booting up and your cache device is gone and never coming back, you
@@ -191,6 +195,9 @@ want for getting the best possible numbers when benchmarking.
 
 SYSFS - BACKING DEVICE:
 
+Available at /sys/block/<bdev>/bcache, /sys/block/bcache*/bcache and
+(if attached) /sys/fs/bcache/<cset-uuid>/bdev*
+
 attach
   Echo the UUID of a cache set to this file to enable caching.
 
@@ -300,6 +307,8 @@ cache_readaheads
 
 SYSFS - CACHE SET:
 
+Available at /sys/fs/bcache/<cset-uuid>
+
 average_key_size
   Average data per key in the btree.
 
@@ -390,6 +399,8 @@ trigger_gc
 
 SYSFS - CACHE DEVICE:
 
+Available at /sys/block/<cdev>/bcache
+
 block_size
   Minimum granularity of writes - should match hardware sector size.
 

MAINTAINERS

@@ -1642,7 +1642,7 @@ S:	Maintained
 F:	drivers/net/hamradio/baycom*
 
 BCACHE (BLOCK LAYER CACHE)
-M:	Kent Overstreet <koverstreet@google.com>
+M:	Kent Overstreet <kmo@daterainc.com>
 L:	linux-bcache@vger.kernel.org
 W:	http://bcache.evilpiepirate.org
 S:	Maintained:
@@ -3346,7 +3346,7 @@ F:	Documentation/firmware_class/
 F:	drivers/base/firmware*.c
 F:	include/linux/firmware.h
 
-FLASHSYSTEM DRIVER (IBM FlashSystem 70/80 PCI SSD Flash Card)
+FLASH ADAPTER DRIVER (IBM Flash Adapter 900GB Full Height PCI Flash Card)
 M:	Joshua Morris <josh.h.morris@us.ibm.com>
 M:	Philip Kelleher <pjk1939@linux.vnet.ibm.com>
 S:	Maintained

Makefile

@@ -1,7 +1,7 @@
 VERSION = 3
 PATCHLEVEL = 11
 SUBLEVEL = 0
-EXTRAVERSION = -rc1
+EXTRAVERSION = -rc2
 NAME = Linux for Workgroups
 
 # *DOCUMENTATION*

arch/alpha/Kconfig

@@ -15,6 +15,7 @@ config ALPHA
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
+	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_CMOS_UPDATE
 	select GENERIC_STRNCPY_FROM_USER

arch/alpha/include/asm/atomic.h

@@ -186,17 +186,24 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
  */
 static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
 {
-	int c, old;
-	c = atomic_read(v);
-	for (;;) {
-		if (unlikely(c == (u)))
-			break;
-		old = atomic_cmpxchg((v), c, c + (a));
-		if (likely(old == c))
-			break;
-		c = old;
-	}
-	return c;
+	int c, new, old;
+	smp_mb();
+	__asm__ __volatile__(
+	"1:	ldl_l	%[old],%[mem]\n"
+	"	cmpeq	%[old],%[u],%[c]\n"
+	"	addl	%[old],%[a],%[new]\n"
+	"	bne	%[c],2f\n"
+	"	stl_c	%[new],%[mem]\n"
+	"	beq	%[new],3f\n"
+	"2:\n"
+	".subsection 2\n"
+	"3:	br	1b\n"
+	".previous"
+	: [old] "=&r"(old), [new] "=&r"(new), [c] "=&r"(c)
+	: [mem] "m"(*v), [a] "rI"(a), [u] "rI"((long)u)
+	: "memory");
+	smp_mb();
+	return old;
 }
 
 
@@ -207,21 +214,56 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
  * @u: ...unless v is equal to u.
  *
  * Atomically adds @a to @v, so long as it was not @u.
- * Returns the old value of @v.
+ * Returns true iff @v was not @u.
  */
 static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
 {
-	long c, old;
-	c = atomic64_read(v);
-	for (;;) {
-		if (unlikely(c == (u)))
-			break;
-		old = atomic64_cmpxchg((v), c, c + (a));
-		if (likely(old == c))
-			break;
-		c = old;
-	}
-	return c != (u);
+	long c, tmp;
+	smp_mb();
+	__asm__ __volatile__(
+	"1:	ldq_l	%[tmp],%[mem]\n"
+	"	cmpeq	%[tmp],%[u],%[c]\n"
+	"	addq	%[tmp],%[a],%[tmp]\n"
+	"	bne	%[c],2f\n"
+	"	stq_c	%[tmp],%[mem]\n"
+	"	beq	%[tmp],3f\n"
+	"2:\n"
+	".subsection 2\n"
+	"3:	br	1b\n"
+	".previous"
+	: [tmp] "=&r"(tmp), [c] "=&r"(c)
+	: [mem] "m"(*v), [a] "rI"(a), [u] "rI"(u)
+	: "memory");
+	smp_mb();
+	return !c;
+}
+
+/*
+ * atomic64_dec_if_positive - decrement by 1 if old value positive
+ * @v: pointer of type atomic_t
+ *
+ * The function returns the old value of *v minus 1, even if
+ * the atomic variable, v, was not decremented.
+ */
+static inline long atomic64_dec_if_positive(atomic64_t *v)
+{
+	long old, tmp;
+	smp_mb();
+	__asm__ __volatile__(
+	"1:	ldq_l	%[old],%[mem]\n"
+	"	subq	%[old],1,%[tmp]\n"
+	"	ble	%[old],2f\n"
+	"	stq_c	%[tmp],%[mem]\n"
+	"	beq	%[tmp],3f\n"
+	"2:\n"
+	".subsection 2\n"
+	"3:	br	1b\n"
+	".previous"
+	: [old] "=&r"(old), [tmp] "=&r"(tmp)
+	: [mem] "m"(*v)
+	: "memory");
+	smp_mb();
+	return old - 1;
 }
 
 #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)

arch/alpha/include/asm/param.h

@@ -3,7 +3,9 @@
 
 #include <uapi/asm/param.h>
 
-#define HZ		CONFIG_HZ
-#define USER_HZ		HZ
-# define CLOCKS_PER_SEC	HZ	/* frequency at which times() counts */
+# undef HZ
+# define HZ		CONFIG_HZ
+# define USER_HZ	1024
+# define CLOCKS_PER_SEC	USER_HZ	/* frequency at which times() counts */
+
 #endif /* _ASM_ALPHA_PARAM_H */

arch/alpha/include/asm/spinlock.h

@@ -168,8 +168,4 @@ static inline void arch_write_unlock(arch_rwlock_t * lock)
 #define arch_read_lock_flags(lock, flags) arch_read_lock(lock)
 #define arch_write_lock_flags(lock, flags) arch_write_lock(lock)
 
-#define arch_spin_relax(lock)	cpu_relax()
-#define arch_read_relax(lock)	cpu_relax()
-#define arch_write_relax(lock)	cpu_relax()
-
 #endif /* _ALPHA_SPINLOCK_H */

arch/alpha/include/asm/unistd.h

@@ -3,8 +3,7 @@
 
 #include <uapi/asm/unistd.h>
 
-
-#define NR_SYSCALLS			506
+#define NR_SYSCALLS			508
 
 #define __ARCH_WANT_OLD_READDIR
 #define __ARCH_WANT_STAT64

arch/alpha/include/uapi/asm/param.h

@@ -1,13 +1,7 @@
 #ifndef _UAPI_ASM_ALPHA_PARAM_H
 #define _UAPI_ASM_ALPHA_PARAM_H
 
-/* ??? Gross.  I don't want to parameterize this, and supposedly the
-   hardware ignores reprogramming.  We also need userland buy-in to the 
-   change in HZ, since this is visible in the wait4 resources etc.  */
-
-#ifndef __KERNEL__
 #define HZ		1024
-#endif
 
 #define EXEC_PAGESIZE	8192
 
@@ -17,5 +11,4 @@
 
 #define MAXHOSTNAMELEN	64	/* max length of hostname */
 
-
 #endif /* _UAPI_ASM_ALPHA_PARAM_H */

arch/alpha/include/uapi/asm/unistd.h

@@ -467,5 +467,7 @@
 #define __NR_sendmmsg			503
 #define __NR_process_vm_readv		504
 #define __NR_process_vm_writev		505
+#define __NR_kcmp			506
+#define __NR_finit_module		507
 
 #endif /* _UAPI_ALPHA_UNISTD_H */