Messages in this thread | | | Date | Mon, 22 Sep 2003 17:35:23 -0400 | From | Chris Friesen <> | Subject | compiler warnings and syscall macros |
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I'm trying to figure something out. For ppc, in asm/unistd.h, __syscall_nr is defined as:
#define __syscall_nr(nr, type, name, args...) \ unsigned long __sc_ret, __sc_err; \ { \ <snipped for brevity> } \ if (__sc_err & 0x10000000) \ { \ errno = __sc_ret; \ __sc_ret = -1; \ } \ return (type) __sc_ret
Whenever I use this in my code, I get compiler warnings about the statment "__sc_ret = -1" since it is assigning a negative value to an unsigned int.
Would it hurt anything if I put in an explicit cast, like this?
__sc_ret = (unsigned long) -1;
This seems to get rid of the warnings, and I can't imagine it hurting anything.
Am I missing something bad here?
Chris
-- Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com
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