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[Linux-cluster] CS4 Update 4/ about __NR_gettid and syscall



Hi

In CS4 Update 4 , there are several places where a syscall call
is dependant on NR_gettid set or not , for example in qdisk/gettid.c :

#include <sys/types.h>
#include <linux/unistd.h>
#include <gettid.h>
#include <errno.h>

/* Patch from Adam Conrad / Ubuntu: Don't use _syscall macro */

#ifdef __NR_gettid
pid_t gettid (void)
{
        return syscall(__NR_gettid);
}
#else

#warn "gettid not available -- substituting with pthread_self()"

#include <pthread.h>
pid_t gettid (void)
{
        return (pid_t)pthread_self();
}
#endif

and also in :
magma-plugins-1.0.9/gulm/gulm.c
rgmanager-1.9.52/src/clulib/gettid

And in fact, I have compilation error if the syscall is choosen by the ifdef ,
so I wonder what to do about that , what does __NR_gettid means ,etc.

Any piece of advise ?

Thanks
Alain


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