On Wed, Jul 13, 2011 at 4:09 AM, nilesh <nilesh.tay...@netscout.com> wrote:
> Hi Sumeet, > > On Wednesday 13 July 2011 04:12 PM, sumeet linux wrote: > > Dear friends, > > > > I want to know the basics xx_initcall ( ) in linux kernel. How this > function > > works ? > > Observed in kernel code, many places late_initcall ( ), early_initcall ( > ), > > arch_initcall ( ), core_initcall ( ) gets called. > > When did all these functions gets call during kernel initialization ? > > I am more interested in what is the sequence of these functions gets > called > > one after another. > I could get a nice link explaining about *_initcall(). Refer: > > http://book.opensourceproject.org.cn/embedded/embeddedprime/opensource/0136130550/ch05lev1sec4.html > > *_initcall() are macros which set the function pointers for subsystem > initialization (typedef int (*initcall_t)(void) : typedef of all such > function pointers). > Also if we look at the source code, the functions are called in below > sequence: > http://lxr.linux.no/#linux+v2.6.39/init/main.c#L695 > > do_basic_setup(void) -> do_initcalls(void) -> do_one_initcall(*fn); > do_one_initcall(*fn) - calls each function. And do_basic_setup() is > called inside the initialization sequence (kernel_init()). > > > > > Thank you. > > > > Regards, > > Sumeet > > > > -- > Thanks, > Nilesh > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > Hi, I hope this will help you to get a basic understanding of init call. http://www.embedded-bits.co.uk/2008/init-call-mechanism/ -- With Regards Subin Gangadharan Everything should be made as simple as possible,but not simpler.
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