* [PATCH v3 1/4] lib: move strtobool to kstrtobool
2016-02-05 21:12 [PATCH v3 0/4] lib: add "on" and "off" to strtobool Kees Cook
@ 2016-02-05 21:12 ` Kees Cook
2016-02-05 21:12 ` [PATCH v3 2/4] lib: update single-char callers of strtobool Kees Cook
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Kees Cook @ 2016-02-05 21:12 UTC (permalink / raw)
To: Andrew Morton
Cc: Kees Cook, Joe Perches, Andy Shevchenko, Rasmus Villemoes,
Daniel Borkmann, Amitkumar Karwar, Nishant Sarmukadam,
Kalle Valo, Steve French, Michael Ellerman, Heiko Carstens,
Martin Schwidefsky, x86, linuxppc-dev, linux-s390,
linux-wireless, netdev, linux-cifs, linux-kernel
Create the kstrtobool_from_user helper and moves strtobool logic into
the new kstrtobool (matching all the other kstrto* functions). Provides
an inline wrapper for existing strtobool callers.
Signed-off-by: Kees Cook <keescook@chromium.org>
---
v3:
- drop needless "base" argument, rasmus
---
include/linux/kernel.h | 2 ++
include/linux/string.h | 6 +++++-
lib/kstrtox.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
lib/string.c | 29 -----------------------------
4 files changed, 57 insertions(+), 30 deletions(-)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index f31638c6e873..f4fa2b29c38c 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -357,6 +357,7 @@ int __must_check kstrtou16(const char *s, unsigned int base, u16 *res);
int __must_check kstrtos16(const char *s, unsigned int base, s16 *res);
int __must_check kstrtou8(const char *s, unsigned int base, u8 *res);
int __must_check kstrtos8(const char *s, unsigned int base, s8 *res);
+int __must_check kstrtobool(const char *s, bool *res);
int __must_check kstrtoull_from_user(const char __user *s, size_t count, unsigned int base, unsigned long long *res);
int __must_check kstrtoll_from_user(const char __user *s, size_t count, unsigned int base, long long *res);
@@ -368,6 +369,7 @@ int __must_check kstrtou16_from_user(const char __user *s, size_t count, unsigne
int __must_check kstrtos16_from_user(const char __user *s, size_t count, unsigned int base, s16 *res);
int __must_check kstrtou8_from_user(const char __user *s, size_t count, unsigned int base, u8 *res);
int __must_check kstrtos8_from_user(const char __user *s, size_t count, unsigned int base, s8 *res);
+int __must_check kstrtobool_from_user(const char __user *s, size_t count, bool *res);
static inline int __must_check kstrtou64_from_user(const char __user *s, size_t count, unsigned int base, u64 *res)
{
diff --git a/include/linux/string.h b/include/linux/string.h
index 9eebc66d957a..2217224684c9 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -128,7 +128,11 @@ extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
extern void argv_free(char **argv);
extern bool sysfs_streq(const char *s1, const char *s2);
-extern int strtobool(const char *s, bool *res);
+extern int kstrtobool(const char *s, bool *res);
+static inline int strtobool(const char *s, bool *res)
+{
+ return kstrtobool(s, res);
+}
#ifdef CONFIG_BINARY_PRINTF
int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
diff --git a/lib/kstrtox.c b/lib/kstrtox.c
index 94be244e8441..e8ba4a013e82 100644
--- a/lib/kstrtox.c
+++ b/lib/kstrtox.c
@@ -321,6 +321,56 @@ int kstrtos8(const char *s, unsigned int base, s8 *res)
}
EXPORT_SYMBOL(kstrtos8);
+/**
+ * kstrtobool - convert common user inputs into boolean values
+ * @s: input string
+ * @res: result
+ *
+ * This routine returns 0 iff the first character is one of 'Yy1Nn0'.
+ * Otherwise it will return -EINVAL. Value pointed to by res is
+ * updated upon finding a match.
+ */
+int kstrtobool(const char *s, bool *res)
+{
+ if (!s)
+ return -EINVAL;
+
+ switch (s[0]) {
+ case 'y':
+ case 'Y':
+ case '1':
+ *res = true;
+ return 0;
+ case 'n':
+ case 'N':
+ case '0':
+ *res = false;
+ return 0;
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(kstrtobool);
+
+/*
+ * Since "base" would be a nonsense argument, this open-codes the
+ * _from_user helper instead of using the helper macro below.
+ */
+int kstrtobool_from_user(const char __user *s, size_t count, bool *res)
+{
+ /* Longest string needed to differentiate, newline, terminator */
+ char buf[4];
+
+ count = min(count, sizeof(buf) - 1);
+ if (copy_from_user(buf, s, count))
+ return -EFAULT;
+ buf[count] = '\0';
+ return kstrtobool(buf, res);
+}
+EXPORT_SYMBOL(kstrtobool_from_user);
+
#define kstrto_from_user(f, g, type) \
int f(const char __user *s, size_t count, unsigned int base, type *res) \
{ \
diff --git a/lib/string.c b/lib/string.c
index 0323c0d5629a..1a90db9bc6e1 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -630,35 +630,6 @@ bool sysfs_streq(const char *s1, const char *s2)
}
EXPORT_SYMBOL(sysfs_streq);
-/**
- * strtobool - convert common user inputs into boolean values
- * @s: input string
- * @res: result
- *
- * This routine returns 0 iff the first character is one of 'Yy1Nn0'.
- * Otherwise it will return -EINVAL. Value pointed to by res is
- * updated upon finding a match.
- */
-int strtobool(const char *s, bool *res)
-{
- switch (s[0]) {
- case 'y':
- case 'Y':
- case '1':
- *res = true;
- break;
- case 'n':
- case 'N':
- case '0':
- *res = false;
- break;
- default:
- return -EINVAL;
- }
- return 0;
-}
-EXPORT_SYMBOL(strtobool);
-
#ifndef __HAVE_ARCH_MEMSET
/**
* memset - Fill a region of memory with the given value
--
2.6.3
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v3 2/4] lib: update single-char callers of strtobool
2016-02-05 21:12 [PATCH v3 0/4] lib: add "on" and "off" to strtobool Kees Cook
2016-02-05 21:12 ` [PATCH v3 1/4] lib: move strtobool to kstrtobool Kees Cook
@ 2016-02-05 21:12 ` Kees Cook
2016-02-05 21:12 ` [PATCH v3 3/4] lib: add "on"/"off" support to kstrtobool Kees Cook
2016-02-05 21:12 ` [PATCH v3 4/4] param: convert some "on"/"off" users to strtobool Kees Cook
3 siblings, 0 replies; 5+ messages in thread
From: Kees Cook @ 2016-02-05 21:12 UTC (permalink / raw)
To: Andrew Morton
Cc: Kees Cook, Amitkumar Karwar, Nishant Sarmukadam, Kalle Valo,
Steve French, linux-cifs, Joe Perches, Andy Shevchenko,
Rasmus Villemoes, Daniel Borkmann, Michael Ellerman,
Heiko Carstens, Martin Schwidefsky, x86, linuxppc-dev,
linux-s390, linux-wireless, netdev, linux-kernel
Some callers of strtobool were passing a pointer to unterminated strings.
In preparation of adding multi-character processing to kstrtobool, update
the callers to not pass single-character pointers, and switch to using the
new kstrtobool_from_user helper where possible.
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Amitkumar Karwar <akarwar@marvell.com>
Cc: Nishant Sarmukadam <nishants@marvell.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: Steve French <sfrench@samba.org>
Cc: linux-cifs@vger.kernel.org
---
v3:
- drop needless buffer, andy.shevchenko
- drop unused "base" argument
---
drivers/net/wireless/marvell/mwifiex/debugfs.c | 10 ++---
fs/cifs/cifs_debug.c | 56 +++++++-------------------
fs/cifs/cifs_debug.h | 2 +-
fs/cifs/cifsfs.c | 6 +--
fs/cifs/cifsglob.h | 4 +-
5 files changed, 24 insertions(+), 54 deletions(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/debugfs.c b/drivers/net/wireless/marvell/mwifiex/debugfs.c
index 0b9c580af988..2eff989c6d9f 100644
--- a/drivers/net/wireless/marvell/mwifiex/debugfs.c
+++ b/drivers/net/wireless/marvell/mwifiex/debugfs.c
@@ -880,14 +880,12 @@ mwifiex_reset_write(struct file *file,
{
struct mwifiex_private *priv = file->private_data;
struct mwifiex_adapter *adapter = priv->adapter;
- char cmd;
bool result;
+ int rc;
- if (copy_from_user(&cmd, ubuf, sizeof(cmd)))
- return -EFAULT;
-
- if (strtobool(&cmd, &result))
- return -EINVAL;
+ rc = kstrtobool_from_user(ubuf, count, &result);
+ if (rc)
+ return rc;
if (!result)
return -EINVAL;
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 50b268483302..788e19195991 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -255,7 +255,6 @@ static const struct file_operations cifs_debug_data_proc_fops = {
static ssize_t cifs_stats_proc_write(struct file *file,
const char __user *buffer, size_t count, loff_t *ppos)
{
- char c;
bool bv;
int rc;
struct list_head *tmp1, *tmp2, *tmp3;
@@ -263,11 +262,8 @@ static ssize_t cifs_stats_proc_write(struct file *file,
struct cifs_ses *ses;
struct cifs_tcon *tcon;
- rc = get_user(c, buffer);
- if (rc)
- return rc;
-
- if (strtobool(&c, &bv) == 0) {
+ rc = kstrtobool_from_user(buffer, count, &bv);
+ if (rc == 0) {
#ifdef CONFIG_CIFS_STATS2
atomic_set(&totBufAllocCount, 0);
atomic_set(&totSmBufAllocCount, 0);
@@ -290,6 +286,8 @@ static ssize_t cifs_stats_proc_write(struct file *file,
}
}
spin_unlock(&cifs_tcp_ses_lock);
+ } else {
+ return rc;
}
return count;
@@ -433,17 +431,17 @@ static int cifsFYI_proc_open(struct inode *inode, struct file *file)
static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
- char c;
+ char c[2] = { '\0' };
bool bv;
int rc;
- rc = get_user(c, buffer);
+ rc = get_user(c[0], buffer);
if (rc)
return rc;
- if (strtobool(&c, &bv) == 0)
+ if (strtobool(c, &bv) == 0)
cifsFYI = bv;
- else if ((c > '1') && (c <= '9'))
- cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
+ else if ((c[0] > '1') && (c[0] <= '9'))
+ cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
return count;
}
@@ -471,20 +469,12 @@ static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
static ssize_t cifs_linux_ext_proc_write(struct file *file,
const char __user *buffer, size_t count, loff_t *ppos)
{
- char c;
- bool bv;
int rc;
- rc = get_user(c, buffer);
+ rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
if (rc)
return rc;
- rc = strtobool(&c, &bv);
- if (rc)
- return rc;
-
- linuxExtEnabled = bv;
-
return count;
}
@@ -511,20 +501,12 @@ static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
static ssize_t cifs_lookup_cache_proc_write(struct file *file,
const char __user *buffer, size_t count, loff_t *ppos)
{
- char c;
- bool bv;
int rc;
- rc = get_user(c, buffer);
+ rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
if (rc)
return rc;
- rc = strtobool(&c, &bv);
- if (rc)
- return rc;
-
- lookupCacheEnabled = bv;
-
return count;
}
@@ -551,20 +533,12 @@ static int traceSMB_proc_open(struct inode *inode, struct file *file)
static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
- char c;
- bool bv;
int rc;
- rc = get_user(c, buffer);
+ rc = kstrtobool_from_user(buffer, count, &traceSMB);
if (rc)
return rc;
- rc = strtobool(&c, &bv);
- if (rc)
- return rc;
-
- traceSMB = bv;
-
return count;
}
@@ -622,7 +596,6 @@ static ssize_t cifs_security_flags_proc_write(struct file *file,
int rc;
unsigned int flags;
char flags_string[12];
- char c;
bool bv;
if ((count < 1) || (count > 11))
@@ -635,11 +608,10 @@ static ssize_t cifs_security_flags_proc_write(struct file *file,
if (count < 3) {
/* single char or single char followed by null */
- c = flags_string[0];
- if (strtobool(&c, &bv) == 0) {
+ if (strtobool(flags_string, &bv) == 0) {
global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
return count;
- } else if (!isdigit(c)) {
+ } else if (!isdigit(flags_string[0])) {
cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
flags_string);
return -EINVAL;
diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h
index 66cf0f9fff89..c611ca2339d7 100644
--- a/fs/cifs/cifs_debug.h
+++ b/fs/cifs/cifs_debug.h
@@ -25,7 +25,7 @@
void cifs_dump_mem(char *label, void *data, int length);
void cifs_dump_detail(void *);
void cifs_dump_mids(struct TCP_Server_Info *);
-extern int traceSMB; /* flag which enables the function below */
+extern bool traceSMB; /* flag which enables the function below */
void dump_smb(void *, int);
#define CIFS_INFO 0x01
#define CIFS_RC 0x02
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index c48ca13673e3..931b446f2a44 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -54,10 +54,10 @@
#endif
int cifsFYI = 0;
-int traceSMB = 0;
+bool traceSMB;
bool enable_oplocks = true;
-unsigned int linuxExtEnabled = 1;
-unsigned int lookupCacheEnabled = 1;
+bool linuxExtEnabled = true;
+bool lookupCacheEnabled = true;
unsigned int global_secflags = CIFSSEC_DEF;
/* unsigned int ntlmv2_support = 0; */
unsigned int sign_CIFS_PDUs = 1;
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index a25b2513f146..d21da9f05bae 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -1596,11 +1596,11 @@ GLOBAL_EXTERN atomic_t midCount;
/* Misc globals */
GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
-GLOBAL_EXTERN unsigned int lookupCacheEnabled;
+GLOBAL_EXTERN bool lookupCacheEnabled;
GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
with more secure ntlmssp2 challenge/resp */
GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
-GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
+GLOBAL_EXTERN bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
--
2.6.3
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v3 3/4] lib: add "on"/"off" support to kstrtobool
2016-02-05 21:12 [PATCH v3 0/4] lib: add "on" and "off" to strtobool Kees Cook
2016-02-05 21:12 ` [PATCH v3 1/4] lib: move strtobool to kstrtobool Kees Cook
2016-02-05 21:12 ` [PATCH v3 2/4] lib: update single-char callers of strtobool Kees Cook
@ 2016-02-05 21:12 ` Kees Cook
2016-02-05 21:12 ` [PATCH v3 4/4] param: convert some "on"/"off" users to strtobool Kees Cook
3 siblings, 0 replies; 5+ messages in thread
From: Kees Cook @ 2016-02-05 21:12 UTC (permalink / raw)
To: Andrew Morton
Cc: Kees Cook, Joe Perches, Andy Shevchenko, Rasmus Villemoes,
Daniel Borkmann, Amitkumar Karwar, Nishant Sarmukadam,
Kalle Valo, Steve French, Michael Ellerman, Heiko Carstens,
Martin Schwidefsky, x86, linuxppc-dev, linux-s390,
linux-wireless, netdev, linux-cifs, linux-kernel
Add support for "on" and "off" when converting to boolean.
Signed-off-by: Kees Cook <keescook@chromium.org>
---
v3:
- add dropped descripion change, andy.shevchenko
---
lib/kstrtox.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/lib/kstrtox.c b/lib/kstrtox.c
index e8ba4a013e82..d8a5cf66c316 100644
--- a/lib/kstrtox.c
+++ b/lib/kstrtox.c
@@ -326,9 +326,9 @@ EXPORT_SYMBOL(kstrtos8);
* @s: input string
* @res: result
*
- * This routine returns 0 iff the first character is one of 'Yy1Nn0'.
- * Otherwise it will return -EINVAL. Value pointed to by res is
- * updated upon finding a match.
+ * This routine returns 0 iff the first character is one of 'Yy1Nn0', or
+ * [oO][NnFf] for "on" and "off". Otherwise it will return -EINVAL. Value
+ * pointed to by res is updated upon finding a match.
*/
int kstrtobool(const char *s, bool *res)
{
@@ -346,6 +346,20 @@ int kstrtobool(const char *s, bool *res)
case '0':
*res = false;
return 0;
+ case 'o':
+ case 'O':
+ switch (s[1]) {
+ case 'n':
+ case 'N':
+ *res = true;
+ return 0;
+ case 'f':
+ case 'F':
+ *res = false;
+ return 0;
+ default:
+ break;
+ }
default:
break;
}
--
2.6.3
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v3 4/4] param: convert some "on"/"off" users to strtobool
2016-02-05 21:12 [PATCH v3 0/4] lib: add "on" and "off" to strtobool Kees Cook
` (2 preceding siblings ...)
2016-02-05 21:12 ` [PATCH v3 3/4] lib: add "on"/"off" support to kstrtobool Kees Cook
@ 2016-02-05 21:12 ` Kees Cook
3 siblings, 0 replies; 5+ messages in thread
From: Kees Cook @ 2016-02-05 21:12 UTC (permalink / raw)
To: Andrew Morton
Cc: Kees Cook, x86, linuxppc-dev, linux-s390, Joe Perches,
Andy Shevchenko, Rasmus Villemoes, Daniel Borkmann,
Amitkumar Karwar, Nishant Sarmukadam, Kalle Valo, Steve French,
Michael Ellerman, Heiko Carstens, Martin Schwidefsky,
linux-wireless, netdev, linux-cifs, linux-kernel
This changes several users of manual "on"/"off" parsing to use strtobool.
Some side-effects:
- these uses will now parse y/n/1/0 meaningfully too
- the early_param uses will now bubble up parse errors
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: x86@kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
---
v3:
- retain __setup return values, andy.shevchenko
- remove unused "base" argument
---
arch/powerpc/kernel/rtasd.c | 7 ++-----
arch/powerpc/platforms/pseries/hotplug-cpu.c | 10 ++--------
arch/s390/kernel/time.c | 8 ++------
arch/s390/kernel/topology.c | 7 ++-----
arch/x86/kernel/aperture_64.c | 12 ++----------
include/linux/tick.h | 2 +-
kernel/time/hrtimer.c | 10 ++--------
kernel/time/tick-sched.c | 10 ++--------
8 files changed, 15 insertions(+), 51 deletions(-)
diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 5a2c049c1c61..0ae5cb84d4e2 100644
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -49,7 +49,7 @@ static unsigned int rtas_error_log_buffer_max;
static unsigned int event_scan;
static unsigned int rtas_event_scan_rate;
-static int full_rtas_msgs = 0;
+static bool full_rtas_msgs;
/* Stop logging to nvram after first fatal error */
static int logging_enabled; /* Until we initialize everything,
@@ -592,10 +592,7 @@ __setup("surveillance=", surveillance_setup);
static int __init rtasmsgs_setup(char *str)
{
- if (strcmp(str, "on") == 0)
- full_rtas_msgs = 1;
- else if (strcmp(str, "off") == 0)
- full_rtas_msgs = 0;
+ kstrtobool(str, &full_rtas_msgs);
return 1;
}
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 32274f72fe3f..282837a1d74b 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -47,20 +47,14 @@ static DEFINE_PER_CPU(enum cpu_state_vals, current_state) = CPU_STATE_OFFLINE;
static enum cpu_state_vals default_offline_state = CPU_STATE_OFFLINE;
-static int cede_offline_enabled __read_mostly = 1;
+static bool cede_offline_enabled __read_mostly = true;
/*
* Enable/disable cede_offline when available.
*/
static int __init setup_cede_offline(char *str)
{
- if (!strcmp(str, "off"))
- cede_offline_enabled = 0;
- else if (!strcmp(str, "on"))
- cede_offline_enabled = 1;
- else
- return 0;
- return 1;
+ return (kstrtobool(str, &cede_offline_enabled) == 0);
}
__setup("cede_offline=", setup_cede_offline);
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 99f84ac31307..580bc7299ec3 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -1433,7 +1433,7 @@ device_initcall(etr_init_sysfs);
/*
* Server Time Protocol (STP) code.
*/
-static int stp_online;
+static bool stp_online;
static struct stp_sstpi stp_info;
static void *stp_page;
@@ -1444,11 +1444,7 @@ static struct timer_list stp_timer;
static int __init early_parse_stp(char *p)
{
- if (strncmp(p, "off", 3) == 0)
- stp_online = 0;
- else if (strncmp(p, "on", 2) == 0)
- stp_online = 1;
- return 0;
+ return kstrtobool(p, &stp_online);
}
early_param("stp", early_parse_stp);
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 40b8102fdadb..64298a867589 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -37,7 +37,7 @@ static void set_topology_timer(void);
static void topology_work_fn(struct work_struct *work);
static struct sysinfo_15_1_x *tl_info;
-static int topology_enabled = 1;
+static bool topology_enabled = true;
static DECLARE_WORK(topology_work, topology_work_fn);
/*
@@ -444,10 +444,7 @@ static const struct cpumask *cpu_book_mask(int cpu)
static int __init early_parse_topology(char *p)
{
- if (strncmp(p, "off", 3))
- return 0;
- topology_enabled = 0;
- return 0;
+ return kstrtobool(p, &topology_enabled);
}
early_param("topology", early_parse_topology);
diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index 6e85f713641d..0a2bb1f62e72 100644
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -227,19 +227,11 @@ static u32 __init search_agp_bridge(u32 *order, int *valid_agp)
return 0;
}
-static int gart_fix_e820 __initdata = 1;
+static bool gart_fix_e820 __initdata = true;
static int __init parse_gart_mem(char *p)
{
- if (!p)
- return -EINVAL;
-
- if (!strncmp(p, "off", 3))
- gart_fix_e820 = 0;
- else if (!strncmp(p, "on", 2))
- gart_fix_e820 = 1;
-
- return 0;
+ return kstrtobool(p, &gart_fix_e820);
}
early_param("gart_fix_e820", parse_gart_mem);
diff --git a/include/linux/tick.h b/include/linux/tick.h
index 97fd4e543846..0ecdf0e248f4 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -98,7 +98,7 @@ static inline void tick_broadcast_exit(void)
}
#ifdef CONFIG_NO_HZ_COMMON
-extern int tick_nohz_enabled;
+extern bool tick_nohz_enabled;
extern int tick_nohz_tick_stopped(void);
extern void tick_nohz_idle_enter(void);
extern void tick_nohz_idle_exit(void);
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 435b8850dd80..8b82caa8a407 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -515,7 +515,7 @@ static inline ktime_t hrtimer_update_base(struct hrtimer_cpu_base *base)
/*
* High resolution timer enabled ?
*/
-static int hrtimer_hres_enabled __read_mostly = 1;
+static bool hrtimer_hres_enabled __read_mostly = true;
unsigned int hrtimer_resolution __read_mostly = LOW_RES_NSEC;
EXPORT_SYMBOL_GPL(hrtimer_resolution);
@@ -524,13 +524,7 @@ EXPORT_SYMBOL_GPL(hrtimer_resolution);
*/
static int __init setup_hrtimer_hres(char *str)
{
- if (!strcmp(str, "off"))
- hrtimer_hres_enabled = 0;
- else if (!strcmp(str, "on"))
- hrtimer_hres_enabled = 1;
- else
- return 0;
- return 1;
+ return (kstrtobool(str, &hrtimer_hres_enabled) == 0);
}
__setup("highres=", setup_hrtimer_hres);
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 9d7a053545f5..7ff0dccdcd81 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -387,20 +387,14 @@ void __init tick_nohz_init(void)
/*
* NO HZ enabled ?
*/
-int tick_nohz_enabled __read_mostly = 1;
+bool tick_nohz_enabled __read_mostly = true;
unsigned long tick_nohz_active __read_mostly;
/*
* Enable / Disable tickless mode
*/
static int __init setup_tick_nohz(char *str)
{
- if (!strcmp(str, "off"))
- tick_nohz_enabled = 0;
- else if (!strcmp(str, "on"))
- tick_nohz_enabled = 1;
- else
- return 0;
- return 1;
+ return (kstrtobool(str, &tick_nohz_enabled) == 0);
}
__setup("nohz=", setup_tick_nohz);
--
2.6.3
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