* Theodore Kim (shkim7@web.dwe.co.kr) wrote:
> Hi all,
> ?
> I was?shocked to see the codelets in some handouts.
> ?
> int init_module()
> {?? pthread_create(abc, NULL, my_thread, NULL); }
> ?
> Could this ever be possible?
No (unless kernel is patched to export a function with the above
prototype, which would be very odd). Nothing from c library or other
userspace libraries is available in kernel code. You'll find a few
niceties in the kernel source, for example in lib/string.c, that are
typically supplied by c library, but nothing like pthreads!
> To the best of my knowledge, only macros and static inline functions defined
> in *.h's and
> functions that are listed in 'ksyms -a' can be used in kernel module
> programming...
Yes. From the point of view of the kernel source, if it isn't inline,
macro or exported via EXPORT_SYMBOL, it isn't available for module code.
> I used kernel_thread() several times but never ever though of using pthread
> in kernel modules.
kernel_thread would be the right thing if you want to create a thread in
a module.
-chris
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