Messages in this thread | | | Date | Wed, 07 Mar 2007 08:30:47 -0800 | From | "H. Peter Anvin" <> | Subject | Re: return negative number for unsigned long function in kernel |
| |
Chen, Dongliang wrote: > Peter & Andreas, > > Thank you very much for your help. > > I understood that the kernel error numbers are limited. The largest > error number for i386 (kernel 2.6) is 131 so far. Assume that the > virtual address returned from do_mmap_pgoff will never exceed (unsigned > long)(-1000L), which is in the address range one page below the maximum > virtual address, then IS_ERR_VALUE() should work. >
The error value boundary is defined in <linux/err.h>, currently 4095.
-hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |