Reg putname() function

From: SATHISH.J (sathish.j@tatainfotech.com)
Date: Mon Jun 18 2001 - 03:49:06 EST


Hi,

Can anybody please tell me what the following assembly code means:
Tne function put_unused_fd() does FD_CLR() to clear the file descriptor
allocated in case file pointer could not be got. Before returning -1 as
file descriptor it goes to put_unused_fd() which calls FD_CLR() which is
as follows;

#define __FD_CLR(fd,fdsetp) \
                __asm__ __volatile__("btrl %1,%0": \
                        "=m" (*(__kernel_fd_set *) (fdsetp)):"r" ((int)
(fd)))

This is in asm/posixtypes.h. Please decipher this for me.

Thanks in advance,
Regards,
sathish

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This archive was generated by hypermail 2b29 : Sat Jun 23 2001 - 21:00:20 EST