[PATCH] doc: kcsan: add support info of gcc for kcsan
KCSAN is also supported in GCC version 7.3.0 or later. For Clang, the supported versions are 7.0.0 and later. Signed-off-by: Wang Wenhu --- Documentation/dev-tools/kcsan.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Documentation/dev-tools/kcsan.rst b/Documentation/dev-tools/kcsan.rst index b38379f06194..05a4578839cf 100644 --- a/Documentation/dev-tools/kcsan.rst +++ b/Documentation/dev-tools/kcsan.rst @@ -8,7 +8,8 @@ approach to detect races. KCSAN's primary purpose is to detect `data races`_. Usage - -KCSAN requires Clang version 11 or later. +KCSAN is supported in both GCC and Clang. With GCC it requires version 7.3.0 +or later. With Clang it requires version 7.0.0 or later. To enable KCSAN configure the kernel with:: -- 2.17.1
[PATCH] sched: loadavg: delete useless param ticks for calc_global_load
The only parameter "unsigned long ticks" for calc_global_load is
never used inside the function definition. Delete it now.
Signed-off-by: Wang Wenhu
---
include/linux/sched/loadavg.h | 2 +-
kernel/sched/loadavg.c| 2 +-
kernel/time/timekeeping.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/sched/loadavg.h b/include/linux/sched/loadavg.h
index 4859bea47a7b..83ec54b65e79 100644
--- a/include/linux/sched/loadavg.h
+++ b/include/linux/sched/loadavg.h
@@ -43,6 +43,6 @@ extern unsigned long calc_load_n(unsigned long load, unsigned
long exp,
#define LOAD_INT(x) ((x) >> FSHIFT)
#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
-extern void calc_global_load(unsigned long ticks);
+extern void calc_global_load(void);
#endif /* _LINUX_SCHED_LOADAVG_H */
diff --git a/kernel/sched/loadavg.c b/kernel/sched/loadavg.c
index de22da666ac7..d2a655643a02 100644
--- a/kernel/sched/loadavg.c
+++ b/kernel/sched/loadavg.c
@@ -347,7 +347,7 @@ static inline void calc_global_nohz(void) { }
*
* Called from the global timer code.
*/
-void calc_global_load(unsigned long ticks)
+void calc_global_load(void)
{
unsigned long sample_window;
long active, delta;
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index d20d489841c8..63a632f9896c 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -2193,7 +2193,7 @@ EXPORT_SYMBOL(ktime_get_coarse_ts64);
void do_timer(unsigned long ticks)
{
jiffies_64 += ticks;
- calc_global_load(ticks);
+ calc_global_load();
}
/**
--
2.17.1
[PATCH] drivers: ipa: remove discription of nonexistent element
No element named "client" exists within "struct ipa_endpoint".
It might be a heritage forgotten to be removed. Delete it now.
Signed-off-by: Wang Wenhu
---
drivers/net/ipa/ipa_endpoint.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/net/ipa/ipa_endpoint.h b/drivers/net/ipa/ipa_endpoint.h
index 4b336a1f759d..bbee9535d4b2 100644
--- a/drivers/net/ipa/ipa_endpoint.h
+++ b/drivers/net/ipa/ipa_endpoint.h
@@ -41,7 +41,6 @@ enum ipa_endpoint_name {
/**
* struct ipa_endpoint - IPA endpoint information
- * @client:Client associated with the endpoint
* @channel_id:EP's GSI channel
* @evt_ring_id: EP's GSI channel event ring
*/
--
2.17.1
[PATCH] drivers: ipa: fix typoes for ipa
Change "transactio" -> "transaction". Also an alignment correction. Signed-off-by: Wang Wenhu --- drivers/net/ipa/gsi.c | 2 +- drivers/net/ipa/ipa_endpoint.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c index b671bea0aa7c..688b99a606bf 100644 --- a/drivers/net/ipa/gsi.c +++ b/drivers/net/ipa/gsi.c @@ -1345,7 +1345,7 @@ static void gsi_channel_update(struct gsi_channel *channel) * gsi_channel_poll_one() - Return a single completed transaction on a channel * @channel: Channel to be polled * - * @Return: Transaction pointer, or null if none are available + * @Return:Transaction pointer, or null if none are available * * This function returns the first entry on a channel's completed transaction * list. If that list is empty, the hardware is consulted to determine diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c index a21534f1462f..b247ae24c0e1 100644 --- a/drivers/net/ipa/ipa_endpoint.c +++ b/drivers/net/ipa/ipa_endpoint.c @@ -340,7 +340,7 @@ int ipa_endpoint_modem_exception_reset_all(struct ipa *ipa) /* We need one command per modem TX endpoint. We can get an upper * bound on that by assuming all initialized endpoints are modem->IPA. * That won't happen, and we could be more precise, but this is fine -* for now. We need to end the transactio with a "tag process." +* for now. We need to end the transaction with a "tag process." */ count = hweight32(initialized) + ipa_cmd_tag_process_count(); trans = ipa_cmd_trans_alloc(ipa, count); -- 2.17.1
[PATCH] drivers: ipa: print dev_err info accurately
Print certain name string instead of hard-coded "memory" for dev_err output, which would be more accurate and helpful for debugging. Signed-off-by: Wang Wenhu Cc: Alex Elder --- drivers/net/ipa/ipa_clock.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ipa/ipa_clock.c b/drivers/net/ipa/ipa_clock.c index ddbd687fe64b..749ff5668e37 100644 --- a/drivers/net/ipa/ipa_clock.c +++ b/drivers/net/ipa/ipa_clock.c @@ -66,8 +66,8 @@ ipa_interconnect_init_one(struct device *dev, const char *name) path = of_icc_get(dev, name); if (IS_ERR(path)) - dev_err(dev, "error %ld getting memory interconnect\n", - PTR_ERR(path)); + dev_err(dev, "error %ld getting %s interconnect\n", + PTR_ERR(path), name); return path; } -- 2.17.1
[PATCH] drivers: ipa: fix typos for ipa_smp2p structure doc
Remove the duplicate "mutex", and change "Motex" to "Mutex". Also I
recommend it's easier for understanding to make the "ready-interrupt"
a bundle for it is a parallel description as "shutdown" which is appended
after the slash.
Signed-off-by: Wang Wenhu
Cc: Alex Elder
---
drivers/net/ipa/ipa_smp2p.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ipa/ipa_smp2p.c b/drivers/net/ipa/ipa_smp2p.c
index 4d33aa7ebfbb..a5f7a79a1923 100644
--- a/drivers/net/ipa/ipa_smp2p.c
+++ b/drivers/net/ipa/ipa_smp2p.c
@@ -53,7 +53,7 @@
* @clock_on: Whether IPA clock is on
* @notified: Whether modem has been notified of clock state
* @disabled: Whether setup ready interrupt handling is disabled
- * @mutex mutex: Motex protecting ready interrupt/shutdown interlock
+ * @mutex: Mutex protecting ready-interrupt/shutdown interlock
* @panic_notifier:Panic notifier structure
*/
struct ipa_smp2p {
--
2.17.1
[PATCH] drivers: ipa: use devm_kzalloc for simplicity
Make a substitution of kzalloc with devm_kzalloc to simplify the
ipa_probe() process.
Signed-off-by: Wang Wenhu
Cc: Alex Elder
---
drivers/net/ipa/ipa_clock.c | 7 ++-
drivers/net/ipa/ipa_main.c | 7 ++-
2 files changed, 4 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ipa/ipa_clock.c b/drivers/net/ipa/ipa_clock.c
index 374491ea11cf..ddbd687fe64b 100644
--- a/drivers/net/ipa/ipa_clock.c
+++ b/drivers/net/ipa/ipa_clock.c
@@ -276,7 +276,7 @@ struct ipa_clock *ipa_clock_init(struct device *dev)
goto err_clk_put;
}
- clock = kzalloc(sizeof(*clock), GFP_KERNEL);
+ clock = devm_kzalloc(dev, sizeof(*clock), GFP_KERNEL);
if (!clock) {
ret = -ENOMEM;
goto err_clk_put;
@@ -285,15 +285,13 @@ struct ipa_clock *ipa_clock_init(struct device *dev)
ret = ipa_interconnect_init(clock, dev);
if (ret)
- goto err_kfree;
+ goto err_clk_put;
mutex_init(&clock->mutex);
atomic_set(&clock->count, 0);
return clock;
-err_kfree:
- kfree(clock);
err_clk_put:
clk_put(clk);
@@ -308,6 +306,5 @@ void ipa_clock_exit(struct ipa_clock *clock)
WARN_ON(atomic_read(&clock->count) != 0);
mutex_destroy(&clock->mutex);
ipa_interconnect_exit(clock);
- kfree(clock);
clk_put(clk);
}
diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 28998dcce3d2..b7b348b863f7 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -760,7 +760,7 @@ static int ipa_probe(struct platform_device *pdev)
}
/* Allocate and initialize the IPA structure */
- ipa = kzalloc(sizeof(*ipa), GFP_KERNEL);
+ ipa = devm_kzalloc(dev, sizeof(*ipa), GFP_KERNEL);
if (!ipa) {
ret = -ENOMEM;
goto err_wakeup_source_unregister;
@@ -776,7 +776,7 @@ static int ipa_probe(struct platform_device *pdev)
ret = ipa_reg_init(ipa);
if (ret)
- goto err_kfree_ipa;
+ goto err_wakeup_source_unregister;
ret = ipa_mem_init(ipa, data->mem_count, data->mem_data);
if (ret)
@@ -848,8 +848,6 @@ static int ipa_probe(struct platform_device *pdev)
ipa_mem_exit(ipa);
err_reg_exit:
ipa_reg_exit(ipa);
-err_kfree_ipa:
- kfree(ipa);
err_wakeup_source_unregister:
wakeup_source_unregister(wakeup_source);
err_clock_exit:
@@ -885,7 +883,6 @@ static int ipa_remove(struct platform_device *pdev)
gsi_exit(&ipa->gsi);
ipa_mem_exit(ipa);
ipa_reg_exit(ipa);
- kfree(ipa);
wakeup_source_unregister(wakeup_source);
ipa_clock_exit(clock);
rproc_put(rproc);
--
2.17.1
[PATCH] cpufreq: fix a minor typo for cpufreq_driver doc
Delete the duplicate "to" possibly double-typed.
Signed-off-by: Wang Wenhu
Cc: Viresh Kumar
---
include/linux/cpufreq.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index f7240251a949..67d5950bd878 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -330,7 +330,7 @@ struct cpufreq_driver {
*
* get_intermediate should return a stable intermediate frequency
* platform wants to switch to and target_intermediate() should set CPU
-* to to that frequency, before jumping to the frequency corresponding
+* to that frequency, before jumping to the frequency corresponding
* to 'index'. Core will take care of sending notifications and driver
* doesn't have to handle them in target_intermediate() or
* target_index().
--
2.17.1
[PATCH] doc: zh_CN: add translatation for debugfs.txt
From: Chucheng Luo Translate Documentation/filesystems/debugfs.txt into Chinese. Signed-off-by: Chucheng Luo Reviewed-by: Alex Shi Signed-off-by: Wang Wenhu [rebase for upstream conflict and minor change of subject] Link: https://lore.kernel.org/linux-doc/20200408021528.14062-1-luochuch...@vivo.com/ --- Note: * Did rebase as asked by Jonathan for the conflict when applied. * Also ajusted the subject description. * For their is no modification of new translated file, I appended the "Reviewed-by" tag from Alex. --- .../zh_CN/filesystems/debugfs.rst | 221 ++ .../translations/zh_CN/filesystems/index.rst | 1 + 2 files changed, 222 insertions(+) create mode 100644 Documentation/translations/zh_CN/filesystems/debugfs.rst diff --git a/Documentation/translations/zh_CN/filesystems/debugfs.rst b/Documentation/translations/zh_CN/filesystems/debugfs.rst new file mode 100644 index ..f8a28793c277 --- /dev/null +++ b/Documentation/translations/zh_CN/filesystems/debugfs.rst @@ -0,0 +1,221 @@ +.. SPDX-License-Identifier: GPL-2.0 + +.. include:: ../disclaimer-zh_CN.rst + +:Original: :ref:`Documentation/filesystems/debugfs.txt ` + +=== +Debugfs +=== + +译者 +:: + + 中文版维护者： 罗楚成 Chucheng Luo + 中文版翻译者： 罗楚成 Chucheng Luo + 中文版校译者: 罗楚成 Chucheng Luo + + + +版权所有2020 罗楚成 + + +Debugfs是内核开发人员在用户空间获取信息的简单方法。与/proc不同，proc只提供进程 +信息。也不像sysfs,具有严格的“每个文件一个值“的规则。debugfs根本没有规则,开发 +人员可以在这里放置他们想要的任何信息。debugfs文件系统也不能用作稳定的ABI接口。 +从理论上讲，debugfs导出文件的时候没有任何约束。但是[1]实际情况并不总是那么 +简单。即使是debugfs接口，也最好根据需要进行设计,并尽量保持接口不变。 + + +Debugfs通常使用以下命令安装:: + +mount -t debugfs none /sys/kernel/debug + +（或等效的/etc/fstab行）。 +debugfs根目录默认仅可由root用户访问。要更改对文件树的访问，请使用“ uid”，“ gid” +和“ mode”挂载选项。请注意，debugfs API仅按照GPL协议导出到模块。 + +使用debugfs的代码应包含。然后，首先是创建至少一个目录来保存 +一组debugfs文件:: + +struct dentry *debugfs_create_dir(const char *name, struct dentry *parent); + +如果成功，此调用将在指定的父目录下创建一个名为name的目录。如果parent参数为空， +则会在debugfs根目录中创建。创建目录成功时，返回值是一个指向dentry结构体的指针。 +该dentry结构体的指针可用于在目录中创建文件（以及最后将其清理干净）。ERR_PTR +（-ERROR）返回值表明出错。如果返回ERR_PTR（-ENODEV），则表明内核是在没有debugfs +支持的情况下构建的，并且下述函数都不会起作用。 + +在debugfs目录中创建文件的最通用方法是:: + +struct dentry *debugfs_create_file(const char *name, umode_t mode, + struct dentry *parent, void *data, + const struct file_operations *fops); + +在这里，name是要创建的文件的名称，mode描述了访问文件应具有的权限，parent指向 +应该保存文件的目录，data将存储在产生的inode结构体的i_private字段中，而fops是 +一组文件操作函数，这些函数中实现文件操作的具体行为。至少，read（）和/或 +write（）操作应提供；其他可以根据需要包括在内。同样的，返回值将是指向创建文件 +的dentry指针，错误时返回ERR_PTR（-ERROR），系统不支持debugfs时返回值为ERR_PTR +（-ENODEV）。创建一个初始大小的文件，可以使用以下函数代替:: + +struct dentry *debugfs_create_file_size(const char *name, umode_t mode, + struct dentry *parent, void *data, + const struct file_operations *fops, + loff_t file_size); + +file_size是初始文件大小。其他参数跟函数debugfs_create_file的相同。 + +在许多情况下，没必要自己去创建一组文件操作;对于一些简单的情况,debugfs代码提供 +了许多帮助函数。包含单个整数值的文件可以使用以下任何一项创建:: + +void debugfs_create_u8(const char *name, umode_t mode, + struct dentry *parent, u8 *value); +void debugfs_create_u16(const char *name, umode_t mode, + struct dentry *parent, u16 *value); +struct dentry *debugfs_create_u32(const char *name, umode_t mode, + struct dentry *parent, u32 *value); +void debugfs_create_u64(const char *name, umode_t mode, + struct dentry *parent, u64 *value); + +这些文件支持读取和写入给定值。如果某个文件不支持写入，只需根据需要设置mode +参数位。这些文件中的值以十进制表示；如果需要使用十六进制，可以使用以下函数 +替代:: + +void debugfs_create_x8(const char *name, umode_t mode, + struct dentry *parent, u8 *value); +void debugfs_create_x16(const char *name, umode_t mode, + struct dentry *parent, u16 *value); +void debugfs_create_x32(const char *name, umode_t mode, + struct dentry *parent, u32 *value); +void debugfs_create_x64(const char *name, umode_t mode, + struct dentry *parent, u64 *value); + +这些功能只有在开发人员知道导出值的大小的时候才有用。某些数据类型在不同的架构上 +有不同的宽度，这样会使情况变得有些复杂。在这种特殊情况下可以使用以下函数:: + +void debugfs_create_size_t(const char *name, umode_t mode, + struct dentry *parent, size_t *value); + +不出所料，此函数将创建一个debugfs文件来表示类型为size_t的变量。 + +同样地，也有导出无符号长整型变量的函数，分别以十进制和十六进制表示如下:: + +struct dentry *debugfs_create_ulong(const char *name, umode_t mode, + struct dentry *parent, + unsigned long *value); +void debugfs_create_xul(const char *name, umode_t mode, + struct dentry *parent, unsigned long *value); + +布尔值可以通过以下方式放置在debugfs中:: + +struct dentry *debugfs_create_bool(const char *name, umode_t mode, + struct dentry *parent, bool *value); + + +读取结
[PATCH] doc: thermal: add cpu-idle-cooling to index tree
Add cpu-idle-cooling.rst to the index list for user reference through self-compiled htmldocs or online documentation tree of kernel. Like: https://www.kernel.org/doc/html/latest/driver-api/thermal/index.html Signed-off-by: Wang Wenhu Cc: Daniel Lezcano --- Documentation/driver-api/thermal/cpu-idle-cooling.rst | 3 +++ Documentation/driver-api/thermal/index.rst| 1 + 2 files changed, 4 insertions(+) diff --git a/Documentation/driver-api/thermal/cpu-idle-cooling.rst b/Documentation/driver-api/thermal/cpu-idle-cooling.rst index a1c3edecae00..b9f34ceb2a38 100644 --- a/Documentation/driver-api/thermal/cpu-idle-cooling.rst +++ b/Documentation/driver-api/thermal/cpu-idle-cooling.rst @@ -1,3 +1,6 @@ + +CPU Idle Cooling + Situation: -- diff --git a/Documentation/driver-api/thermal/index.rst b/Documentation/driver-api/thermal/index.rst index 5ba61d19c6ae..4cb0b9b6bfb8 100644 --- a/Documentation/driver-api/thermal/index.rst +++ b/Documentation/driver-api/thermal/index.rst @@ -8,6 +8,7 @@ Thermal :maxdepth: 1 cpu-cooling-api + cpu-idle-cooling sysfs-api power_allocator -- 2.17.1
