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-rw-r--r--Documentation/devices.txt2
-rw-r--r--drivers/char/vt_ioctl.c8
-rw-r--r--fs/xfs/xfs_buf_item.h5
-rw-r--r--fs/xfs/xfs_log_recover.c51
-rw-r--r--fs/xfs/xfs_trans_buf.c1
-rw-r--r--kernel/futex.c26
-rw-r--r--kernel/futex_compat.c28
-rw-r--r--kernel/sys.c2
-rw-r--r--mm/hugetlb.c2
9 files changed, 47 insertions, 78 deletions
diff --git a/Documentation/devices.txt b/Documentation/devices.txt
index 8de132a02ba9..6c46730c631a 100644
--- a/Documentation/devices.txt
+++ b/Documentation/devices.txt
@@ -94,6 +94,8 @@ 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
diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
index 045e6888d15b..c799b7f7bbb3 100644
--- a/drivers/char/vt_ioctl.c
+++ b/drivers/char/vt_ioctl.c
@@ -770,6 +770,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
/*
* Switching-from response
*/
+ acquire_console_sem();
if (vc->vt_newvt >= 0) {
if (arg == 0)
/*
@@ -784,7 +785,6 @@ 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);
@@ -798,7 +798,6 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
* other console switches..
*/
complete_change_console(vc_cons[newvt].d);
- release_console_sem();
}
}
@@ -810,9 +809,12 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
/*
* If it's just an ACK, ignore it
*/
- if (arg != VT_ACKACQ)
+ if (arg != VT_ACKACQ) {
+ release_console_sem();
return -EINVAL;
+ }
}
+ release_console_sem();
return 0;
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index fa25b7dcc6c3..d7e136143066 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -52,11 +52,6 @@ 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
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 7174991f4bef..8ae6e8e5f3db 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1874,7 +1874,6 @@ 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)
@@ -1885,50 +1884,6 @@ 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:
@@ -1962,7 +1917,7 @@ xlog_recover_do_reg_buffer(
-1, 0, XFS_QMOPT_DOWARN,
"dquot_buf_recover");
}
- if (!error && stale_buf)
+ if (!error)
memcpy(xfs_buf_offset(bp,
(uint)bit << XFS_BLI_SHIFT), /* dest */
item->ri_buf[i].i_addr, /* source */
@@ -2134,7 +2089,7 @@ xlog_recover_do_dquot_buffer(
if (log->l_quotaoffs_flag & type)
return;
- xlog_recover_do_reg_buffer(mp, item, bp, buf_f);
+ xlog_recover_do_reg_buffer(item, bp, buf_f);
}
/*
@@ -2235,7 +2190,7 @@ 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(mp, item, bp, buf_f);
+ xlog_recover_do_reg_buffer(item, bp, buf_f);
}
if (error)
return XFS_ERROR(error);
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 95fff6872a2f..60b6b898022b 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -966,7 +966,6 @@ 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;
}
diff --git a/kernel/futex.c b/kernel/futex.c
index e8935b195e88..fcc94e7b4086 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -1943,9 +1943,10 @@ 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, *pending;
- unsigned int limit = ROBUST_LIST_LIMIT, pi, pip;
+ struct robust_list __user *entry, *next_entry, *pending;
+ unsigned int limit = ROBUST_LIST_LIMIT, pi, next_pi, pip;
unsigned long futex_offset;
+ int rc;
/*
* Fetch the list head (which was registered earlier, via
@@ -1965,12 +1966,14 @@ void exit_robust_list(struct task_struct *curr)
if (fetch_robust_entry(&pending, &head->list_op_pending, &pip))
return;
- if (pending)
- handle_futex_death((void __user *)pending + futex_offset,
- curr, pip);
-
+ next_entry = NULL; /* avoid warning with gcc */
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:
*/
@@ -1978,11 +1981,10 @@ void exit_robust_list(struct task_struct *curr)
if (handle_futex_death((void __user *)entry + futex_offset,
curr, pi))
return;
- /*
- * Fetch the next entry in the list:
- */
- if (fetch_robust_entry(&entry, &entry->next, &pi))
+ if (rc)
return;
+ entry = next_entry;
+ pi = next_pi;
/*
* Avoid excessively long or circular lists:
*/
@@ -1991,6 +1993,10 @@ 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,
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 7e52eb051f22..2c2e2954b713 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -38,10 +38,11 @@ fetch_robust_entry(compat_uptr_t *uentry, struct robust_list __user **entry,
void compat_exit_robust_list(struct task_struct *curr)
{
struct compat_robust_list_head __user *head = curr->compat_robust_list;
- struct robust_list __user *entry, *pending;
- unsigned int limit = ROBUST_LIST_LIMIT, pi, pip;
- compat_uptr_t uentry, upending;
+ struct robust_list __user *entry, *next_entry, *pending;
+ unsigned int limit = ROBUST_LIST_LIMIT, pi, next_pi, pip;
+ compat_uptr_t uentry, next_uentry, upending;
compat_long_t futex_offset;
+ int rc;
/*
* Fetch the list head (which was registered earlier, via
@@ -61,11 +62,16 @@ void compat_exit_robust_list(struct task_struct *curr)
if (fetch_robust_entry(&upending, &pending,
&head->list_op_pending, &pip))
return;
- if (pending)
- handle_futex_death((void __user *)pending + futex_offset, curr, pip);
+ next_entry = NULL; /* avoid warning with gcc */
while (entry != (struct robust_list __user *) &head->list) {
/*
+ * Fetch the next entry in the list before calling
+ * handle_futex_death:
+ */
+ rc = fetch_robust_entry(&next_uentry, &next_entry,
+ (compat_uptr_t __user *)&entry->next, &next_pi);
+ /*
* A pending lock might already be on the list, so
* dont process it twice:
*/
@@ -74,12 +80,11 @@ void compat_exit_robust_list(struct task_struct *curr)
curr, pi))
return;
- /*
- * Fetch the next entry in the list:
- */
- if (fetch_robust_entry(&uentry, &entry,
- (compat_uptr_t __user *)&entry->next, &pi))
+ if (rc)
return;
+ uentry = next_uentry;
+ entry = next_entry;
+ pi = next_pi;
/*
* Avoid excessively long or circular lists:
*/
@@ -88,6 +93,9 @@ void compat_exit_robust_list(struct task_struct *curr)
cond_resched();
}
+ if (pending)
+ handle_futex_death((void __user *)pending + futex_offset,
+ curr, pip);
}
asmlinkage long
diff --git a/kernel/sys.c b/kernel/sys.c
index 1b33b05d346b..8ae2e636eb1b 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -32,6 +32,7 @@
#include <linux/getcpu.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/seccomp.h>
+#include <linux/cpu.h>
#include <linux/compat.h>
#include <linux/syscalls.h>
@@ -878,6 +879,7 @@ void kernel_power_off(void)
kernel_shutdown_prepare(SYSTEM_POWER_OFF);
if (pm_power_off_prepare)
pm_power_off_prepare();
+ disable_nonboot_cpus();
sysdev_shutdown();
printk(KERN_EMERG "Power down.\n");
machine_power_off();
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 84c795ee2d65..eab8c428cc93 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -42,7 +42,7 @@ static void clear_huge_page(struct page *page, unsigned long addr)
might_sleep();
for (i = 0; i < (HPAGE_SIZE/PAGE_SIZE); i++) {
cond_resched();
- clear_user_highpage(page + i, addr);
+ clear_user_highpage(page + i, addr + i * PAGE_SIZE);
}
}

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