5e2b7aa2e3
procfs: Remove unnecessary cleanup on proc_create failure
2023-07-23 18:41:46 +08:00
b8bbcd8a07
treewide: Replace kernel.h by printk.h
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The kernel.h should be discouraged for use.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com >
2023-02-23 12:54:30 +02:00
e62dff0df4
treewide: Clean up the headers
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The rule of thumb is to include the headers we are the direct user of.
In particular, if we need an atomic API, we include <linux/atomic.h>.
On the other hand we should not use headers for no reason. In particular,
if we are not doing any IRQ job, why is the <linux/irq.h> included?
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com >
2023-02-23 12:54:30 +02:00
0f9c72631c
Fix dereference NULL pointer with proc_lseek
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Since the operations are static storage duration, the pointer in
operation structures will initialize with NULL. But, the kernel
doesn't check whether the pointer is NULL or not when calling it.
Related Discussion:
- https://github.com/sysprog21/lkmpg/issues/165
- https://github.com/sysprog21/lkmpg/issues/160
Close #165
2022-09-21 16:57:23 +08:00
148fb013ee
Avoid unexpected concurrent access ( #94 )
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In file {chardev,chardev2,sleep}.c, the variable to determine
the exclusive access was of integer type, which led to race
condition.
This patch rewrote the above with atomic CAS respectively
to eliminate the race.
Close #93
2021-09-07 23:42:06 +08:00
9289bfe59c
Fix the warnings raised by Sparse ( #92 )
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Sparse[1] is a semantic parser, capable of finding out the potential
problems of Linux kernel code. This patch fixed the warnings.
[1] https://www.kernel.org/doc/html/latest/dev-tools/sparse.html
2021-09-04 17:53:29 +08:00
eef2bc4395
Enforce Linux kernel coding style ( #88 )
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The only exception is to indent with four spaces rather than tabs
for sticking to compact layout of source listing.
Close #87
2021-09-02 15:15:07 +08:00
ad4ac48eec
Fix init message
2021-08-10 00:48:19 +08:00
8c12c8dce1
Make program style consistent again
2021-08-08 01:50:42 +08:00
10c7a9433a
Apply editorial changes
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This patch makes source listing shorter and more compact, that helps
when browsing.
2021-08-08 01:24:59 +08:00
d43259c553
Drop the deprecated init_module() and cleanup_module()
2021-08-08 00:29:24 +08:00
64f791f274
Improve the compatibility with kernel version < 5.6
2021-07-22 07:17:31 +08:00
50b8dfe6c2
Enforce the customized style for example code
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Instead of using tab for indention, the style defaults to 4 spaces for
the sake of compact layout.
2021-07-22 06:58:13 +08:00
2246e20809
Add LaTeX script and sample code
2021-07-22 06:35:24 +08:00
