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Merge branch 'akpm' (Andrew's patch-bomb)

Merge patches from Andrew Morton:
 "Nine patches - some bug fixes and some MAINTAINERS fiddling."

* emailed from Andrew Morton <akpm@linux-foundation.org>:
  drivers/video/backlight/s6e63m0.c: fix corruption storing gamma mode
  MAINTAINERS: add entry for exynos mipi display drivers
  MAINTAINERS: fix link to Gustavo Padovans tree
  MAINTAINERS: add Johan to Bluetooth maintainers
  MAINTAINERS: Gustavo has moved
  prctl: use CAP_SYS_RESOURCE for PR_SET_MM option
  rapidio/tsi721: fix bug in register offset definitions
  MAINTAINERS: update ST's Mailing list for SPEAr
  memcg: free mem_cgroup by RCU to fix oops
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2 parents 7c32442 + cf2b94d commit 0c4d0670f6e54f8507c30c01928cc9ff630ca497 @torvalds torvalds committed Mar 16, 2012
Showing with 92 additions and 27 deletions.
  1. +28 −4 MAINTAINERS
  2. +15 −15 drivers/rapidio/devices/tsi721.h
  3. +1 −1 drivers/video/backlight/s6e63m0.c
  4. +1 −1 kernel/sys.c
  5. +47 −6 mm/memcontrol.c
View
@@ -1513,19 +1513,23 @@ F: drivers/mtd/devices/block2mtd.c
BLUETOOTH DRIVERS
M: Marcel Holtmann <marcel@holtmann.org>
-M: "Gustavo F. Padovan" <padovan@profusion.mobi>
+M: Gustavo Padovan <gustavo@padovan.org>
+M: Johan Hedberg <johan.hedberg@gmail.com>
L: linux-bluetooth@vger.kernel.org
W: http://www.bluez.org/
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-2.6.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jh/bluetooth.git
S: Maintained
F: drivers/bluetooth/
BLUETOOTH SUBSYSTEM
M: Marcel Holtmann <marcel@holtmann.org>
-M: "Gustavo F. Padovan" <padovan@profusion.mobi>
+M: Gustavo Padovan <gustavo@padovan.org>
+M: Johan Hedberg <johan.hedberg@gmail.com>
L: linux-bluetooth@vger.kernel.org
W: http://www.bluez.org/
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-2.6.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jh/bluetooth.git
S: Maintained
F: net/bluetooth/
F: include/net/bluetooth/
@@ -2351,6 +2355,15 @@ S: Supported
F: drivers/gpu/drm/exynos
F: include/drm/exynos*
+EXYNOS MIPI DISPLAY DRIVERS
+M: Inki Dae <inki.dae@samsung.com>
+M: Donghwa Lee <dh09.lee@samsung.com>
+M: Kyungmin Park <kyungmin.park@samsung.com>
+L: linux-fbdev@vger.kernel.org
+S: Maintained
+F: drivers/video/exynos/exynos_mipi*
+F: include/video/exynos_mipi*
+
DSCC4 DRIVER
M: Francois Romieu <romieu@fr.zoreil.com>
L: netdev@vger.kernel.org
@@ -5859,6 +5872,7 @@ F: drivers/mmc/host/sdhci-s3c.c
SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) ST SPEAR DRIVER
M: Viresh Kumar <viresh.kumar@st.com>
+L: spear-devel@list.st.com
L: linux-mmc@vger.kernel.org
S: Maintained
F: drivers/mmc/host/sdhci-spear.c
@@ -6201,24 +6215,32 @@ F: drivers/tty/serial/sunzilog.h
SPEAR PLATFORM SUPPORT
M: Viresh Kumar <viresh.kumar@st.com>
+L: spear-devel@list.st.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
W: http://www.st.com/spear
S: Maintained
F: arch/arm/plat-spear/
SPEAR3XX MACHINE SUPPORT
M: Viresh Kumar <viresh.kumar@st.com>
+L: spear-devel@list.st.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
W: http://www.st.com/spear
S: Maintained
F: arch/arm/mach-spear3xx/
SPEAR6XX MACHINE SUPPORT
M: Rajeev Kumar <rajeev-dlh.kumar@st.com>
+L: spear-devel@list.st.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
W: http://www.st.com/spear
S: Maintained
F: arch/arm/mach-spear6xx/
SPEAR CLOCK FRAMEWORK SUPPORT
M: Viresh Kumar <viresh.kumar@st.com>
+L: spear-devel@list.st.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
W: http://www.st.com/spear
S: Maintained
F: arch/arm/mach-spear*/clock.c
@@ -6227,6 +6249,8 @@ F: arch/arm/plat-spear/include/plat/clock.h
SPEAR PAD MULTIPLEXING SUPPORT
M: Viresh Kumar <viresh.kumar@st.com>
+L: spear-devel@list.st.com
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
W: http://www.st.com/spear
S: Maintained
F: arch/arm/plat-spear/include/plat/padmux.h
@@ -118,34 +118,34 @@
#define TSI721_IDB_ENTRY_SIZE 64
-#define TSI721_IDQ_CTL(x) (0x20000 + (x) * 1000)
+#define TSI721_IDQ_CTL(x) (0x20000 + (x) * 0x1000)
#define TSI721_IDQ_SUSPEND 0x00000002
#define TSI721_IDQ_INIT 0x00000001
-#define TSI721_IDQ_STS(x) (0x20004 + (x) * 1000)
+#define TSI721_IDQ_STS(x) (0x20004 + (x) * 0x1000)
#define TSI721_IDQ_RUN 0x00200000
-#define TSI721_IDQ_MASK(x) (0x20008 + (x) * 1000)
+#define TSI721_IDQ_MASK(x) (0x20008 + (x) * 0x1000)
#define TSI721_IDQ_MASK_MASK 0xffff0000
#define TSI721_IDQ_MASK_PATT 0x0000ffff
-#define TSI721_IDQ_RP(x) (0x2000c + (x) * 1000)
+#define TSI721_IDQ_RP(x) (0x2000c + (x) * 0x1000)
#define TSI721_IDQ_RP_PTR 0x0007ffff
-#define TSI721_IDQ_WP(x) (0x20010 + (x) * 1000)
+#define TSI721_IDQ_WP(x) (0x20010 + (x) * 0x1000)
#define TSI721_IDQ_WP_PTR 0x0007ffff
-#define TSI721_IDQ_BASEL(x) (0x20014 + (x) * 1000)
+#define TSI721_IDQ_BASEL(x) (0x20014 + (x) * 0x1000)
#define TSI721_IDQ_BASEL_ADDR 0xffffffc0
-#define TSI721_IDQ_BASEU(x) (0x20018 + (x) * 1000)
-#define TSI721_IDQ_SIZE(x) (0x2001c + (x) * 1000)
+#define TSI721_IDQ_BASEU(x) (0x20018 + (x) * 0x1000)
+#define TSI721_IDQ_SIZE(x) (0x2001c + (x) * 0x1000)
#define TSI721_IDQ_SIZE_VAL(size) (__fls(size) - 4)
#define TSI721_IDQ_SIZE_MIN 512
#define TSI721_IDQ_SIZE_MAX (512 * 1024)
-#define TSI721_SR_CHINT(x) (0x20040 + (x) * 1000)
-#define TSI721_SR_CHINTE(x) (0x20044 + (x) * 1000)
-#define TSI721_SR_CHINTSET(x) (0x20048 + (x) * 1000)
+#define TSI721_SR_CHINT(x) (0x20040 + (x) * 0x1000)
+#define TSI721_SR_CHINTE(x) (0x20044 + (x) * 0x1000)
+#define TSI721_SR_CHINTSET(x) (0x20048 + (x) * 0x1000)
#define TSI721_SR_CHINT_ODBOK 0x00000020
#define TSI721_SR_CHINT_IDBQRCV 0x00000010
#define TSI721_SR_CHINT_SUSP 0x00000008
@@ -156,7 +156,7 @@
#define TSI721_IBWIN_NUM 8
-#define TSI721_IBWINLB(x) (0x29000 + (x) * 20)
+#define TSI721_IBWINLB(x) (0x29000 + (x) * 0x20)
#define TSI721_IBWINLB_BA 0xfffff000
#define TSI721_IBWINLB_WEN 0x00000001
@@ -187,13 +187,13 @@
*/
#define TSI721_OBWIN_NUM TSI721_PC2SR_WINS
-#define TSI721_OBWINLB(x) (0x40000 + (x) * 20)
+#define TSI721_OBWINLB(x) (0x40000 + (x) * 0x20)
#define TSI721_OBWINLB_BA 0xffff8000
#define TSI721_OBWINLB_WEN 0x00000001
-#define TSI721_OBWINUB(x) (0x40004 + (x) * 20)
+#define TSI721_OBWINUB(x) (0x40004 + (x) * 0x20)
-#define TSI721_OBWINSZ(x) (0x40008 + (x) * 20)
+#define TSI721_OBWINSZ(x) (0x40008 + (x) * 0x20)
#define TSI721_OBWINSZ_SIZE 0x00001f00
#define TSI721_OBWIN_SIZE(size) (__fls(size) - 15)
@@ -690,7 +690,7 @@ static ssize_t s6e63m0_sysfs_store_gamma_mode(struct device *dev,
struct backlight_device *bd = NULL;
int brightness, rc;
- rc = strict_strtoul(buf, 0, (unsigned long *)&lcd->gamma_mode);
+ rc = kstrtouint(buf, 0, &lcd->gamma_mode);
if (rc < 0)
return rc;
View
@@ -1706,7 +1706,7 @@ static int prctl_set_mm(int opt, unsigned long addr,
if (arg4 | arg5)
return -EINVAL;
- if (!capable(CAP_SYS_ADMIN))
+ if (!capable(CAP_SYS_RESOURCE))
return -EPERM;
if (addr >= TASK_SIZE)
View
@@ -230,10 +230,30 @@ struct mem_cgroup {
* the counter to account for memory usage
*/
struct res_counter res;
- /*
- * the counter to account for mem+swap usage.
- */
- struct res_counter memsw;
+
+ union {
+ /*
+ * the counter to account for mem+swap usage.
+ */
+ struct res_counter memsw;
+
+ /*
+ * rcu_freeing is used only when freeing struct mem_cgroup,
+ * so put it into a union to avoid wasting more memory.
+ * It must be disjoint from the css field. It could be
+ * in a union with the res field, but res plays a much
+ * larger part in mem_cgroup life than memsw, and might
+ * be of interest, even at time of free, when debugging.
+ * So share rcu_head with the less interesting memsw.
+ */
+ struct rcu_head rcu_freeing;
+ /*
+ * But when using vfree(), that cannot be done at
+ * interrupt time, so we must then queue the work.
+ */
+ struct work_struct work_freeing;
+ };
+
/*
* Per cgroup active and inactive list, similar to the
* per zone LRU lists.
@@ -4780,6 +4800,27 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
}
/*
+ * Helpers for freeing a vzalloc()ed mem_cgroup by RCU,
+ * but in process context. The work_freeing structure is overlaid
+ * on the rcu_freeing structure, which itself is overlaid on memsw.
+ */
+static void vfree_work(struct work_struct *work)
+{
+ struct mem_cgroup *memcg;
+
+ memcg = container_of(work, struct mem_cgroup, work_freeing);
+ vfree(memcg);
+}
+static void vfree_rcu(struct rcu_head *rcu_head)
+{
+ struct mem_cgroup *memcg;
+
+ memcg = container_of(rcu_head, struct mem_cgroup, rcu_freeing);
+ INIT_WORK(&memcg->work_freeing, vfree_work);
+ schedule_work(&memcg->work_freeing);
+}
+
+/*
* At destroying mem_cgroup, references from swap_cgroup can remain.
* (scanning all at force_empty is too costly...)
*
@@ -4802,9 +4843,9 @@ static void __mem_cgroup_free(struct mem_cgroup *memcg)
free_percpu(memcg->stat);
if (sizeof(struct mem_cgroup) < PAGE_SIZE)
- kfree(memcg);
+ kfree_rcu(memcg, rcu_freeing);
else
- vfree(memcg);
+ call_rcu(&memcg->rcu_freeing, vfree_rcu);
}
static void mem_cgroup_get(struct mem_cgroup *memcg)

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