linD026 beb1ff1595 Fix potential concurrent problems in chardev2.c ... After forking, Each file descriptor in the child refers to the same open file description as the parent. So when calling open() before fork(), the child can access the device file without checking by exclusive access in device_open(). It may cause race conditions in device_ioctl(). Because of that, it is unnecessary to check the multiple access in device_open(). It just needs check in device_ioctl(), since read(), write(), seek() system call are atomic [1][2]. Related discussion: - https://github.com/sysprog21/lkmpg/issues/148 [1] https://lore.kernel.org/lkml/53022DB1.4070805@gmail.com/ [2] https://www.kernel.org/doc/html/latest/filesystems/files.html Close #148		2022-04-17 02:41:25 +08:00
..
other	Fix incoherent ioctl examples (#139)	2022-02-21 00:53:29 +08:00
.clang-format	Introduce Virtual Input Device Driver	2022-04-06 17:13:29 +08:00
bottomhalf.c	Fix typo, grammar and remove duplicated words	2022-03-07 16:56:13 +08:00
chardev.c	Fix typo, grammar and remove duplicated words	2022-03-07 16:56:13 +08:00
chardev.h	Fix incoherent ioctl examples (#139)	2022-02-21 00:53:29 +08:00
chardev2.c	Fix potential concurrent problems in chardev2.c	2022-04-17 02:41:25 +08:00
completions.c	Fix the warnings raised by Sparse (#92)	2021-09-04 17:53:29 +08:00
cryptosha256.c	Fix the warnings raised by Sparse (#92)	2021-09-04 17:53:29 +08:00
cryptosk.c	Fix the warnings raised by Sparse (#92)	2021-09-04 17:53:29 +08:00
devicemodel.c	Enforce Linux kernel coding style (#88)	2021-09-02 15:15:07 +08:00
example_atomic.c	CI: Run static analysis with Cppcheck (#105)	2021-09-14 00:52:04 +08:00
example_mutex.c	Fix the warnings raised by Sparse (#92)	2021-09-04 17:53:29 +08:00
example_rwlock.c	Fix the warnings raised by Sparse (#92)	2021-09-04 17:53:29 +08:00
example_spinlock.c	Fix the warnings raised by Sparse (#92)	2021-09-04 17:53:29 +08:00
example_tasklet.c	Fix typo, grammar and remove duplicated words	2022-03-07 16:56:13 +08:00
hello-1.c	Mention pr_info() rather than KERN_INFO	2021-08-16 21:53:22 +02:00
hello-2.c	Enforce Linux kernel coding style (#88)	2021-09-02 15:15:07 +08:00
hello-3.c	Enforce Linux kernel coding style (#88)	2021-09-02 15:15:07 +08:00
hello-4.c	Enforce Linux kernel coding style (#88)	2021-09-02 15:15:07 +08:00
hello-5.c	Fix grammar	2022-03-09 14:14:08 +08:00
hello-sysfs.c	Enforce Linux kernel coding style (#88)	2021-09-02 15:15:07 +08:00
intrpt.c	Enforce Linux kernel coding style (#88)	2021-09-02 15:15:07 +08:00
ioctl.c	Fix a logic error in examples/ioctl.c (#137)	2022-02-21 00:58:47 +08:00
kbleds.c	CI: Introduce Smatch for static analysis (#125)	2021-11-01 08:20:41 +08:00
Makefile	Fix wrong regular expression of clang-format	2022-04-10 22:51:59 +08:00
print_string.c	Fix typo, grammar and remove duplicated words	2022-03-07 16:56:13 +08:00
procfs1.c	Fix the warnings raised by Sparse (#92)	2021-09-04 17:53:29 +08:00
procfs2.c	CI: Introduce Smatch for static analysis (#125)	2021-11-01 08:20:41 +08:00
procfs3.c	Fix the warnings raised by Sparse (#92)	2021-09-04 17:53:29 +08:00
procfs4.c	suppress warning: no newline at end of file	2021-09-08 22:23:02 +08:00
sched.c	Enforce Linux kernel coding style (#88)	2021-09-02 15:15:07 +08:00
sleep.c	Avoid unexpected concurrent access (#94)	2021-09-07 23:42:06 +08:00
start.c	Apply editorial changes	2021-08-08 01:24:59 +08:00
stop.c	Fix the warnings raised by Sparse (#92)	2021-09-04 17:53:29 +08:00
syscall.c	Improve the description of finding syscall table	2022-03-17 07:51:59 +08:00
vinput.c	Introduce Virtual Input Device Driver	2022-04-06 17:13:29 +08:00
vinput.h	Introduce Virtual Input Device Driver	2022-04-06 17:13:29 +08:00
vkbd.c	Introduce Virtual Input Device Driver	2022-04-06 17:13:29 +08:00