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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-20 20:00:43 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-20 20:00:43 -0800
commit4c9a44aebeaef35570a67aed17b72a2cf8d0b219 (patch)
treeabb874fe7f50671627b282f6c7fb58db5e75a2e3
parent1f0377ff088ed2971c57debc9b0c3b846ec431fd (diff)
parentcfde819088422503b5c69e03ab7bb90f87121d4d (diff)
downloadlinux-stericsson-4c9a44aebeaef35570a67aed17b72a2cf8d0b219.tar.gz
Merge branch 'akpm' (Andrew's patch-bomb)
Merge the rest of Andrew's patches for -rc1: "A bunch of fixes and misc missed-out-on things. That'll do for -rc1. I still have a batch of IPC patches which still have a possible bug report which I'm chasing down." * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (25 commits) keys: use keyring_alloc() to create module signing keyring keys: fix unreachable code sendfile: allows bypassing of notifier events SGI-XP: handle non-fatal traps fat: fix incorrect function comment Documentation: ABI: remove testing/sysfs-devices-node proc: fix inconsistent lock state linux/kernel.h: fix DIV_ROUND_CLOSEST with unsigned divisors memcg: don't register hotcpu notifier from ->css_alloc() checkpatch: warn on uapi #includes that #include <uapi/... revert "rtc: recycle id when unloading a rtc driver" mm: clean up transparent hugepage sysfs error messages hfsplus: add error message for the case of failure of sync fs in delayed_sync_fs() method hfsplus: rework processing of hfs_btree_write() returned error hfsplus: rework processing errors in hfsplus_free_extents() hfsplus: avoid crash on failed block map free kcmp: include linux/ptrace.h drivers/rtc/rtc-imxdi.c: must include <linux/spinlock.h> mm: cma: WARN if freed memory is still in use exec: do not leave bprm->interp on stack ...
-rw-r--r--Documentation/ABI/testing/sysfs-devices-node7
-rw-r--r--Documentation/kernel-parameters.txt6
-rw-r--r--drivers/firmware/dmi_scan.c78
-rw-r--r--drivers/misc/sgi-xp/xpc_main.c34
-rw-r--r--drivers/rtc/class.c1
-rw-r--r--drivers/rtc/rtc-imxdi.c1
-rw-r--r--fs/binfmt_misc.c5
-rw-r--r--fs/binfmt_script.c4
-rw-r--r--fs/exec.c15
-rw-r--r--fs/fat/dir.c5
-rw-r--r--fs/fat/inode.c2
-rw-r--r--fs/fat/misc.c4
-rw-r--r--fs/hfsplus/bitmap.c13
-rw-r--r--fs/hfsplus/btree.c5
-rw-r--r--fs/hfsplus/extents.c24
-rw-r--r--fs/hfsplus/hfsplus_fs.h2
-rw-r--r--fs/hfsplus/super.c15
-rw-r--r--fs/proc/generic.c12
-rw-r--r--fs/read_write.c2
-rw-r--r--include/linux/binfmts.h1
-rw-r--r--include/linux/kernel.h6
-rw-r--r--kernel/kcmp.c1
-rw-r--r--kernel/modsign_pubkey.c15
-rw-r--r--mm/compaction.c26
-rw-r--r--mm/huge_memory.c6
-rw-r--r--mm/memcontrol.c14
-rw-r--r--mm/page-writeback.c25
-rw-r--r--mm/page_alloc.c11
-rwxr-xr-xscripts/checkpatch.pl7
-rw-r--r--security/keys/process_keys.c2
30 files changed, 261 insertions, 88 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-node b/Documentation/ABI/testing/sysfs-devices-node
deleted file mode 100644
index 453a210c3ceb..000000000000
--- a/Documentation/ABI/testing/sysfs-devices-node
+++ /dev/null
@@ -1,7 +0,0 @@
-What: /sys/devices/system/node/nodeX/compact
-Date: February 2010
-Contact: Mel Gorman <mel@csn.ul.ie>
-Description:
- When this file is written to, all memory within that node
- will be compacted. When it completes, memory will be freed
- into blocks which have as many contiguous pages as possible
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index ddd84d627185..363e348bff9b 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -446,12 +446,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
possible to determine what the correct size should be.
This option provides an override for these situations.
- capability.disable=
- [SECURITY] Disable capabilities. This would normally
- be used only if an alternative security model is to be
- configured. Potentially dangerous and should only be
- used if you are entirely sure of the consequences.
-
ccw_timeout_log [S390]
See Documentation/s390/CommonIO for details.
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index b298158cb922..fd3ae6290d71 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -16,6 +16,7 @@
*/
static char dmi_empty_string[] = " ";
+static u16 __initdata dmi_ver;
/*
* Catch too early calls to dmi_check_system():
*/
@@ -118,12 +119,12 @@ static int __init dmi_walk_early(void (*decode)(const struct dmi_header *,
return 0;
}
-static int __init dmi_checksum(const u8 *buf)
+static int __init dmi_checksum(const u8 *buf, u8 len)
{
u8 sum = 0;
int a;
- for (a = 0; a < 15; a++)
+ for (a = 0; a < len; a++)
sum += buf[a];
return sum == 0;
@@ -161,8 +162,10 @@ static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int inde
return;
for (i = 0; i < 16 && (is_ff || is_00); i++) {
- if(d[i] != 0x00) is_ff = 0;
- if(d[i] != 0xFF) is_00 = 0;
+ if (d[i] != 0x00)
+ is_00 = 0;
+ if (d[i] != 0xFF)
+ is_ff = 0;
}
if (is_ff || is_00)
@@ -172,7 +175,15 @@ static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int inde
if (!s)
return;
- sprintf(s, "%pUB", d);
+ /*
+ * As of version 2.6 of the SMBIOS specification, the first 3 fields of
+ * the UUID are supposed to be little-endian encoded. The specification
+ * says that this is the defacto standard.
+ */
+ if (dmi_ver >= 0x0206)
+ sprintf(s, "%pUL", d);
+ else
+ sprintf(s, "%pUB", d);
dmi_ident[slot] = s;
}
@@ -404,29 +415,57 @@ static int __init dmi_present(const char __iomem *p)
u8 buf[15];
memcpy_fromio(buf, p, 15);
- if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) {
+ if (dmi_checksum(buf, 15)) {
dmi_num = (buf[13] << 8) | buf[12];
dmi_len = (buf[7] << 8) | buf[6];
dmi_base = (buf[11] << 24) | (buf[10] << 16) |
(buf[9] << 8) | buf[8];
- /*
- * DMI version 0.0 means that the real version is taken from
- * the SMBIOS version, which we don't know at this point.
- */
- if (buf[14] != 0)
- printk(KERN_INFO "DMI %d.%d present.\n",
- buf[14] >> 4, buf[14] & 0xF);
- else
- printk(KERN_INFO "DMI present.\n");
if (dmi_walk_early(dmi_decode) == 0) {
+ if (dmi_ver)
+ pr_info("SMBIOS %d.%d present.\n",
+ dmi_ver >> 8, dmi_ver & 0xFF);
+ else {
+ dmi_ver = (buf[14] & 0xF0) << 4 |
+ (buf[14] & 0x0F);
+ pr_info("Legacy DMI %d.%d present.\n",
+ dmi_ver >> 8, dmi_ver & 0xFF);
+ }
dmi_dump_ids();
return 0;
}
}
+ dmi_ver = 0;
return 1;
}
+static int __init smbios_present(const char __iomem *p)
+{
+ u8 buf[32];
+ int offset = 0;
+
+ memcpy_fromio(buf, p, 32);
+ if ((buf[5] < 32) && dmi_checksum(buf, buf[5])) {
+ dmi_ver = (buf[6] << 8) + buf[7];
+
+ /* Some BIOS report weird SMBIOS version, fix that up */
+ switch (dmi_ver) {
+ case 0x021F:
+ case 0x0221:
+ pr_debug("SMBIOS version fixup(2.%d->2.%d)\n",
+ dmi_ver & 0xFF, 3);
+ dmi_ver = 0x0203;
+ break;
+ case 0x0233:
+ pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", 51, 6);
+ dmi_ver = 0x0206;
+ break;
+ }
+ offset = 16;
+ }
+ return dmi_present(buf + offset);
+}
+
void __init dmi_scan_machine(void)
{
char __iomem *p, *q;
@@ -444,7 +483,7 @@ void __init dmi_scan_machine(void)
if (p == NULL)
goto error;
- rc = dmi_present(p + 0x10); /* offset of _DMI_ string */
+ rc = smbios_present(p);
dmi_iounmap(p, 32);
if (!rc) {
dmi_available = 1;
@@ -462,7 +501,12 @@ void __init dmi_scan_machine(void)
goto error;
for (q = p; q < p + 0x10000; q += 16) {
- rc = dmi_present(q);
+ if (memcmp(q, "_SM_", 4) == 0 && q - p <= 0xFFE0)
+ rc = smbios_present(q);
+ else if (memcmp(q, "_DMI_", 5) == 0)
+ rc = dmi_present(q);
+ else
+ continue;
if (!rc) {
dmi_available = 1;
dmi_iounmap(p, 0x10000);
diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c
index 8d082b46426b..d971817182f7 100644
--- a/drivers/misc/sgi-xp/xpc_main.c
+++ b/drivers/misc/sgi-xp/xpc_main.c
@@ -53,6 +53,10 @@
#include <linux/kthread.h>
#include "xpc.h"
+#ifdef CONFIG_X86_64
+#include <asm/traps.h>
+#endif
+
/* define two XPC debug device structures to be used with dev_dbg() et al */
struct device_driver xpc_dbg_name = {
@@ -1079,6 +1083,9 @@ xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
return NOTIFY_DONE;
}
+/* Used to only allow one cpu to complete disconnect */
+static unsigned int xpc_die_disconnecting;
+
/*
* Notify other partitions to deactivate from us by first disengaging from all
* references to our memory.
@@ -1092,6 +1099,9 @@ xpc_die_deactivate(void)
long keep_waiting;
long wait_to_print;
+ if (cmpxchg(&xpc_die_disconnecting, 0, 1))
+ return;
+
/* keep xpc_hb_checker thread from doing anything (just in case) */
xpc_exiting = 1;
@@ -1159,7 +1169,7 @@ xpc_die_deactivate(void)
* about the lack of a heartbeat.
*/
static int
-xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
+xpc_system_die(struct notifier_block *nb, unsigned long event, void *_die_args)
{
#ifdef CONFIG_IA64 /* !!! temporary kludge */
switch (event) {
@@ -1191,7 +1201,27 @@ xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
break;
}
#else
- xpc_die_deactivate();
+ struct die_args *die_args = _die_args;
+
+ switch (event) {
+ case DIE_TRAP:
+ if (die_args->trapnr == X86_TRAP_DF)
+ xpc_die_deactivate();
+
+ if (((die_args->trapnr == X86_TRAP_MF) ||
+ (die_args->trapnr == X86_TRAP_XF)) &&
+ !user_mode_vm(die_args->regs))
+ xpc_die_deactivate();
+
+ break;
+ case DIE_INT3:
+ case DIE_DEBUG:
+ break;
+ case DIE_OOPS:
+ case DIE_GPF:
+ default:
+ xpc_die_deactivate();
+ }
#endif
return NOTIFY_DONE;
diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index f8a0aab218cb..5143629dedbd 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -244,7 +244,6 @@ void rtc_device_unregister(struct rtc_device *rtc)
rtc_proc_del_device(rtc);
device_unregister(&rtc->dev);
rtc->ops = NULL;
- ida_simple_remove(&rtc_ida, rtc->id);
mutex_unlock(&rtc->ops_lock);
put_device(&rtc->dev);
}
diff --git a/drivers/rtc/rtc-imxdi.c b/drivers/rtc/rtc-imxdi.c
index 18a4f0dd78a3..8da7a5cf83c6 100644
--- a/drivers/rtc/rtc-imxdi.c
+++ b/drivers/rtc/rtc-imxdi.c
@@ -36,6 +36,7 @@
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <linux/sched.h>
+#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/of.h>
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 9be335fb8a7c..0c8869fdd14e 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -172,7 +172,10 @@ static int load_misc_binary(struct linux_binprm *bprm)
goto _error;
bprm->argc ++;
- bprm->interp = iname; /* for binfmt_script */
+ /* Update interp in case binfmt_script needs it. */
+ retval = bprm_change_interp(iname, bprm);
+ if (retval < 0)
+ goto _error;
interp_file = open_exec (iname);
retval = PTR_ERR (interp_file);
diff --git a/fs/binfmt_script.c b/fs/binfmt_script.c
index 1610a91637e5..5027a3e14922 100644
--- a/fs/binfmt_script.c
+++ b/fs/binfmt_script.c
@@ -80,7 +80,9 @@ static int load_script(struct linux_binprm *bprm)
retval = copy_strings_kernel(1, &i_name, bprm);
if (retval) return retval;
bprm->argc++;
- bprm->interp = interp;
+ retval = bprm_change_interp(interp, bprm);
+ if (retval < 0)
+ return retval;
/*
* OK, now restart the process with the interpreter's dentry.
diff --git a/fs/exec.c b/fs/exec.c
index af8ec80f816d..18c45cac368f 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1175,9 +1175,24 @@ void free_bprm(struct linux_binprm *bprm)
mutex_unlock(&current->signal->cred_guard_mutex);
abort_creds(bprm->cred);
}
+ /* If a binfmt changed the interp, free it. */
+ if (bprm->interp != bprm->filename)
+ kfree(bprm->interp);
kfree(bprm);
}
+int bprm_change_interp(char *interp, struct linux_binprm *bprm)
+{
+ /* If a binfmt changed the interp, free it first. */
+ if (bprm->interp != bprm->filename)
+ kfree(bprm->interp);
+ bprm->interp = kstrdup(interp, GFP_KERNEL);
+ if (!bprm->interp)
+ return -ENOMEM;
+ return 0;
+}
+EXPORT_SYMBOL(bprm_change_interp);
+
/*
* install the new credentials for this executable
*/
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 2a182342442e..58bf744dbf39 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -461,8 +461,7 @@ static int fat_parse_short(struct super_block *sb,
}
/*
- * Return values: negative -> error, 0 -> not found, positive -> found,
- * value is the total amount of slots, including the shortname entry.
+ * Return values: negative -> error/not found, 0 -> found.
*/
int fat_search_long(struct inode *inode, const unsigned char *name,
int name_len, struct fat_slot_info *sinfo)
@@ -1255,7 +1254,7 @@ int fat_add_entries(struct inode *dir, void *slots, int nr_slots,
sinfo->nr_slots = nr_slots;
- /* First stage: search free direcotry entries */
+ /* First stage: search free directory entries */
free_slots = nr_bhs = 0;
bh = prev = NULL;
pos = 0;
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 35806813ea4e..f8f491677a4a 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1344,7 +1344,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
sbi->dir_entries = get_unaligned_le16(&b->dir_entries);
if (sbi->dir_entries & (sbi->dir_per_block - 1)) {
if (!silent)
- fat_msg(sb, KERN_ERR, "bogus directroy-entries per block"
+ fat_msg(sb, KERN_ERR, "bogus directory-entries per block"
" (%u)", sbi->dir_entries);
brelse(bh);
goto out_invalid;
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 5eb600dc43a9..359d307b5507 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -135,6 +135,10 @@ int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster)
}
if (ret < 0)
return ret;
+ /*
+ * FIXME:Although we can add this cache, fat_cache_add() is
+ * assuming to be called after linear search with fat_cache_id.
+ */
// fat_cache_add(inode, new_fclus, new_dclus);
} else {
MSDOS_I(inode)->i_start = new_dclus;
diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c
index 4cfbe2edd296..6feefc0cb48a 100644
--- a/fs/hfsplus/bitmap.c
+++ b/fs/hfsplus/bitmap.c
@@ -176,12 +176,14 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
dprint(DBG_BITMAP, "block_free: %u,%u\n", offset, count);
/* are all of the bits in range? */
if ((offset + count) > sbi->total_blocks)
- return -2;
+ return -ENOENT;
mutex_lock(&sbi->alloc_mutex);
mapping = sbi->alloc_file->i_mapping;
pnr = offset / PAGE_CACHE_BITS;
page = read_mapping_page(mapping, pnr, NULL);
+ if (IS_ERR(page))
+ goto kaboom;
pptr = kmap(page);
curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32;
end = pptr + PAGE_CACHE_BITS / 32;
@@ -214,6 +216,8 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
set_page_dirty(page);
kunmap(page);
page = read_mapping_page(mapping, ++pnr, NULL);
+ if (IS_ERR(page))
+ goto kaboom;
pptr = kmap(page);
curr = pptr;
end = pptr + PAGE_CACHE_BITS / 32;
@@ -232,4 +236,11 @@ out:
mutex_unlock(&sbi->alloc_mutex);
return 0;
+
+kaboom:
+ printk(KERN_CRIT "hfsplus: unable to mark blocks free: error %ld\n",
+ PTR_ERR(page));
+ mutex_unlock(&sbi->alloc_mutex);
+
+ return -EIO;
}
diff --git a/fs/hfsplus/btree.c b/fs/hfsplus/btree.c
index 21023d9f8ff3..685d07d0ed18 100644
--- a/fs/hfsplus/btree.c
+++ b/fs/hfsplus/btree.c
@@ -159,7 +159,7 @@ void hfs_btree_close(struct hfs_btree *tree)
kfree(tree);
}
-void hfs_btree_write(struct hfs_btree *tree)
+int hfs_btree_write(struct hfs_btree *tree)
{
struct hfs_btree_header_rec *head;
struct hfs_bnode *node;
@@ -168,7 +168,7 @@ void hfs_btree_write(struct hfs_btree *tree)
node = hfs_bnode_find(tree, 0);
if (IS_ERR(node))
/* panic? */
- return;
+ return -EIO;
/* Load the header */
page = node->page[0];
head = (struct hfs_btree_header_rec *)(kmap(page) +
@@ -186,6 +186,7 @@ void hfs_btree_write(struct hfs_btree *tree)
kunmap(page);
set_page_dirty(page);
hfs_bnode_put(node);
+ return 0;
}
static struct hfs_bnode *hfs_bmap_new_bmap(struct hfs_bnode *prev, u32 idx)
diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c
index 5849e3ef35cc..eba76eab6d62 100644
--- a/fs/hfsplus/extents.c
+++ b/fs/hfsplus/extents.c
@@ -329,6 +329,7 @@ static int hfsplus_free_extents(struct super_block *sb,
{
u32 count, start;
int i;
+ int err = 0;
hfsplus_dump_extent(extent);
for (i = 0; i < 8; extent++, i++) {
@@ -345,18 +346,33 @@ found:
for (;;) {
start = be32_to_cpu(extent->start_block);
if (count <= block_nr) {
- hfsplus_block_free(sb, start, count);
+ err = hfsplus_block_free(sb, start, count);
+ if (err) {
+ printk(KERN_ERR "hfs: can't free extent\n");
+ dprint(DBG_EXTENT, " start: %u count: %u\n",
+ start, count);
+ }
extent->block_count = 0;
extent->start_block = 0;
block_nr -= count;
} else {
count -= block_nr;
- hfsplus_block_free(sb, start + count, block_nr);
+ err = hfsplus_block_free(sb, start + count, block_nr);
+ if (err) {
+ printk(KERN_ERR "hfs: can't free extent\n");
+ dprint(DBG_EXTENT, " start: %u count: %u\n",
+ start, count);
+ }
extent->block_count = cpu_to_be32(count);
block_nr = 0;
}
- if (!block_nr || !i)
- return 0;
+ if (!block_nr || !i) {
+ /*
+ * Try to free all extents and
+ * return only last error
+ */
+ return err;
+ }
i--;
extent--;
count = be32_to_cpu(extent->block_count);
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index c571de224b15..a6da86b1b4c1 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -335,7 +335,7 @@ int hfsplus_block_free(struct super_block *, u32, u32);
/* btree.c */
struct hfs_btree *hfs_btree_open(struct super_block *, u32);
void hfs_btree_close(struct hfs_btree *);
-void hfs_btree_write(struct hfs_btree *);
+int hfs_btree_write(struct hfs_btree *);
struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
void hfs_bmap_free(struct hfs_bnode *);
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 811a84d2d964..796198d26553 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -127,8 +127,14 @@ static int hfsplus_system_write_inode(struct inode *inode)
hfsplus_mark_mdb_dirty(inode->i_sb);
}
hfsplus_inode_write_fork(inode, fork);
- if (tree)
- hfs_btree_write(tree);
+ if (tree) {
+ int err = hfs_btree_write(tree);
+ if (err) {
+ printk(KERN_ERR "hfs: b-tree write err: %d, ino %lu\n",
+ err, inode->i_ino);
+ return err;
+ }
+ }
return 0;
}
@@ -226,6 +232,7 @@ out:
static void delayed_sync_fs(struct work_struct *work)
{
+ int err;
struct hfsplus_sb_info *sbi;
sbi = container_of(work, struct hfsplus_sb_info, sync_work.work);
@@ -234,7 +241,9 @@ static void delayed_sync_fs(struct work_struct *work)
sbi->work_queued = 0;
spin_unlock(&sbi->work_lock);
- hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
+ err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
+ if (err)
+ printk(KERN_ERR "hfs: delayed sync fs err %d\n", err);
}
void hfsplus_mark_mdb_dirty(struct super_block *sb)
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 2e4ed13b9eed..e064f562b1f7 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -352,18 +352,18 @@ retry:
if (!ida_pre_get(&proc_inum_ida, GFP_KERNEL))
return -ENOMEM;
- spin_lock(&proc_inum_lock);
+ spin_lock_bh(&proc_inum_lock);
error = ida_get_new(&proc_inum_ida, &i);
- spin_unlock(&proc_inum_lock);
+ spin_unlock_bh(&proc_inum_lock);
if (error == -EAGAIN)
goto retry;
else if (error)
return error;
if (i > UINT_MAX - PROC_DYNAMIC_FIRST) {
- spin_lock(&proc_inum_lock);
+ spin_lock_bh(&proc_inum_lock);
ida_remove(&proc_inum_ida, i);
- spin_unlock(&proc_inum_lock);
+ spin_unlock_bh(&proc_inum_lock);
return -ENOSPC;
}
*inum = PROC_DYNAMIC_FIRST + i;
@@ -372,9 +372,9 @@ retry:
void proc_free_inum(unsigned int inum)
{
- spin_lock(&proc_inum_lock);
+ spin_lock_bh(&proc_inum_lock);
ida_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
- spin_unlock(&proc_inum_lock);
+ spin_unlock_bh(&proc_inum_lock);
}
static void *proc_follow_link(struct dentry *dentry, struct nameidata *nd)
diff --git a/fs/read_write.c b/fs/read_write.c
index 1edaf099ddd7..bb34af315280 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -935,6 +935,8 @@ ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, size_t count,
if (retval > 0) {
add_rchar(current, retval);
add_wchar(current, retval);
+ fsnotify_access(in.file);
+ fsnotify_modify(out.file);
}
inc_syscr(current);
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index cf3eae0b4f59..0530b9860359 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -112,6 +112,7 @@ extern int setup_arg_pages(struct linux_binprm * bprm,
unsigned long stack_top,
int executable_stack);
extern int bprm_mm_init(struct linux_binprm *bprm);
+extern int bprm_change_interp(char *interp, struct linux_binprm *bprm);
extern int copy_strings_kernel(int argc, const char *const *argv,
struct linux_binprm *bprm);
extern int prepare_bprm_creds(struct linux_binprm *bprm);
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index d140e8fb075f..c566927efcbd 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -77,13 +77,15 @@
/*
* Divide positive or negative dividend by positive divisor and round
- * to closest integer. Result is undefined for negative divisors.
+ * to closest integer. Result is undefined for negative divisors and
+ * for negative dividends if the divisor variable type is unsigned.
*/
#define DIV_ROUND_CLOSEST(x, divisor)( \
{ \
typeof(x) __x = x; \
typeof(divisor) __d = divisor; \
- (((typeof(x))-1) > 0 || (__x) > 0) ? \
+ (((typeof(x))-1) > 0 || \
+ ((typeof(divisor))-1) > 0 || (__x) > 0) ? \
(((__x) + ((__d) / 2)) / (__d)) : \
(((__x) - ((__d) / 2)) / (__d)); \
} \
diff --git a/kernel/kcmp.c b/kernel/kcmp.c
index 30b7b225306c..e30ac0fe61c3 100644
--- a/kernel/kcmp.c
+++ b/kernel/kcmp.c
@@ -4,6 +4,7 @@
#include <linux/string.h>
#include <linux/random.h>
#include <linux/module.h>
+#include <linux/ptrace.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/cache.h>
diff --git a/kernel/modsign_pubkey.c b/kernel/modsign_pubkey.c
index 045504fffbb2..2b6e69909c39 100644
--- a/kernel/modsign_pubkey.c
+++ b/kernel/modsign_pubkey.c
@@ -34,18 +34,15 @@ static __init int module_verify_init(void)
{
pr_notice("Initialise module verification\n");
- modsign_keyring = key_alloc(&key_type_keyring, ".module_sign",
- KUIDT_INIT(0), KGIDT_INIT(0),
- current_cred(),
- (KEY_POS_ALL & ~KEY_POS_SETATTR) |
- KEY_USR_VIEW | KEY_USR_READ,
- KEY_ALLOC_NOT_IN_QUOTA);
+ modsign_keyring = keyring_alloc(".module_sign",
+ KUIDT_INIT(0), KGIDT_INIT(0),
+ current_cred(),
+ ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
+ KEY_USR_VIEW | KEY_USR_READ),
+ KEY_ALLOC_NOT_IN_QUOTA, NULL);
if (IS_ERR(modsign_keyring))
panic("Can't allocate module signing keyring\n");
- if (key_instantiate_and_link(modsign_keyring, NULL, 0, NULL, NULL) < 0)
- panic("Can't instantiate module signing keyring\n");
-
return 0;
}
diff --git a/mm/compaction.c b/mm/compaction.c
index 5ad7f4f4d6f7..6b807e466497 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -17,6 +17,21 @@
#include <linux/balloon_compaction.h>
#include "internal.h"
+#ifdef CONFIG_COMPACTION
+static inline void count_compact_event(enum vm_event_item item)
+{
+ count_vm_event(item);
+}
+
+static inline void count_compact_events(enum vm_event_item item, long delta)
+{
+ count_vm_events(item, delta);
+}
+#else
+#define count_compact_event(item) do { } while (0)
+#define count_compact_events(item, delta) do { } while (0)
+#endif
+
#if defined CONFIG_COMPACTION || defined CONFIG_CMA
#define CREATE_TRACE_POINTS
@@ -303,10 +318,9 @@ static unsigned long isolate_freepages_block(struct compact_control *cc,
if (blockpfn == end_pfn)
update_pageblock_skip(cc, valid_page, total_isolated, false);
- count_vm_events(COMPACTFREE_SCANNED, nr_scanned);
+ count_compact_events(COMPACTFREE_SCANNED, nr_scanned);
if (total_isolated)
- count_vm_events(COMPACTISOLATED, total_isolated);
-
+ count_compact_events(COMPACTISOLATED, total_isolated);
return total_isolated;
}
@@ -613,9 +627,9 @@ next_pageblock:
trace_mm_compaction_isolate_migratepages(nr_scanned, nr_isolated);
- count_vm_events(COMPACTMIGRATE_SCANNED, nr_scanned);
+ count_compact_events(COMPACTMIGRATE_SCANNED, nr_scanned);
if (nr_isolated)
- count_vm_events(COMPACTISOLATED, nr_isolated);
+ count_compact_events(COMPACTISOLATED, nr_isolated);
return low_pfn;
}
@@ -1110,7 +1124,7 @@ unsigned long try_to_compact_pages(struct zonelist *zonelist,
if (!order || !may_enter_fs || !may_perform_io)
return rc;
- count_vm_event(COMPACTSTALL);
+ count_compact_event(COMPACTSTALL);
#ifdef CONFIG_CMA
if (allocflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 32754eece63e..9e894edc7811 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -574,19 +574,19 @@ static int __init hugepage_init_sysfs(struct kobject **hugepage_kobj)
*hugepage_kobj = kobject_create_and_add("transparent_hugepage", mm_kobj);
if (unlikely(!*hugepage_kobj)) {
- printk(KERN_ERR "hugepage: failed kobject create\n");
+ printk(KERN_ERR "hugepage: failed to create transparent hugepage kobject\n");
return -ENOMEM;
}
err = sysfs_create_group(*hugepage_kobj, &hugepage_attr_group);
if (err) {
- printk(KERN_ERR "hugepage: failed register hugeage group\n");
+ printk(KERN_ERR "hugepage: failed to register transparent hugepage group\n");
goto delete_obj;
}
err = sysfs_create_group(*hugepage_kobj, &khugepaged_attr_group);
if (err) {
- printk(KERN_ERR "hugepage: failed register hugeage group\n");
+ printk(KERN_ERR "hugepage: failed to register transparent hugepage group\n");
goto remove_hp_group;
}
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index f3009b4bae51..09255ec8159c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6090,7 +6090,6 @@ mem_cgroup_css_alloc(struct cgroup *cont)
&per_cpu(memcg_stock, cpu);
INIT_WORK(&stock->work, drain_local_stock);
}
- hotcpu_notifier(memcg_cpu_hotplug_callback, 0);
} else {
parent = mem_cgroup_from_cont(cont->parent);
memcg->use_hierarchy = parent->use_hierarchy;
@@ -6756,6 +6755,19 @@ struct cgroup_subsys mem_cgroup_subsys = {
.use_id = 1,
};
+/*
+ * The rest of init is performed during ->css_alloc() for root css which
+ * happens before initcalls. hotcpu_notifier() can't be done together as
+ * it would introduce circular locking by adding cgroup_lock -> cpu hotplug
+ * dependency. Do it from a subsys_initcall().
+ */
+static int __init mem_cgroup_init(void)
+{
+ hotcpu_notifier(memcg_cpu_hotplug_callback, 0);
+ return 0;
+}
+subsys_initcall(mem_cgroup_init);
+
#ifdef CONFIG_MEMCG_SWAP
static int __init enable_swap_account(char *s)
{
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 6f4271224493..0713bfbf0954 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -201,6 +201,18 @@ static unsigned long highmem_dirtyable_memory(unsigned long total)
zone_reclaimable_pages(z) - z->dirty_balance_reserve;
}
/*
+ * Unreclaimable memory (kernel memory or anonymous memory
+ * without swap) can bring down the dirtyable pages below
+ * the zone's dirty balance reserve and the above calculation
+ * will underflow. However we still want to add in nodes
+ * which are below threshold (negative values) to get a more
+ * accurate calculation but make sure that the total never
+ * underflows.
+ */
+ if ((long)x < 0)
+ x = 0;
+
+ /*
* Make sure that the number of highmem pages is never larger
* than the number of the total dirtyable memory. This can only
* occur in very strange VM situations but we want to make sure
@@ -222,8 +234,8 @@ static unsigned long global_dirtyable_memory(void)
{
unsigned long x;
- x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages() -
- dirty_balance_reserve;
+ x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages();
+ x -= min(x, dirty_balance_reserve);
if (!vm_highmem_is_dirtyable)
x -= highmem_dirtyable_memory(x);
@@ -290,9 +302,12 @@ static unsigned long zone_dirtyable_memory(struct zone *zone)
* highmem zone can hold its share of dirty pages, so we don't
* care about vm_highmem_is_dirtyable here.
*/
- return zone_page_state(zone, NR_FREE_PAGES) +
- zone_reclaimable_pages(zone) -
- zone->dirty_balance_reserve;
+ unsigned long nr_pages = zone_page_state(zone, NR_FREE_PAGES) +
+ zone_reclaimable_pages(zone);
+
+ /* don't allow this to underflow */
+ nr_pages -= min(nr_pages, zone->dirty_balance_reserve);
+ return nr_pages;
}
/**
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2ad2ad168efe..4ba5e37127fc 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5978,8 +5978,15 @@ done:
void free_contig_range(unsigned long pfn, unsigned nr_pages)
{
- for (; nr_pages--; ++pfn)
- __free_page(pfn_to_page(pfn));
+ unsigned int count = 0;
+
+ for (; nr_pages--; pfn++) {
+ struct page *page = pfn_to_page(pfn);
+
+ count += page_count(page) != 1;
+ __free_page(page);
+ }
+ WARN(count != 0, "%d pages are still in use!\n", count);
}
#endif
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 1d6e4c541370..4d2c7dfdaabd 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2226,8 +2226,11 @@ sub process {
my $path = $1;
if ($path =~ m{//}) {
ERROR("MALFORMED_INCLUDE",
- "malformed #include filename\n" .
- $herecurr);
+ "malformed #include filename\n" . $herecurr);
+ }
+ if ($path =~ "^uapi/" && $realfile =~ m@\binclude/uapi/@) {
+ ERROR("UAPI_INCLUDE",
+ "No #include in ...include/uapi/... should use a uapi/ path prefix\n" . $herecurr);
}
}
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 58dfe0890947..20e4bf57aec8 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -367,8 +367,6 @@ key_ref_t search_my_process_keyrings(struct key_type *type,
switch (PTR_ERR(key_ref)) {
case -EAGAIN: /* no key */
- if (ret)
- break;
case -ENOKEY: /* negative key */
ret = key_ref;
break;