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SubjectRe: #define MADV_NORMAL different in kernel and glibc
From
Date
rwhron@earthlink.net writes:

> Not a bug, just an inconsistency:
>
> #defines for MADV_* are different between glibc-2.2.4 and recent linux kernels.
>
> Most src/linux/include/asm*/mman.h define MADV_* in hex.
> asm-alpha and asm-parisc in Linus and Alan trees use decimal.
>
> /usr/include/bits comes from glibc.
>
> hrandoz@rushmore:/$ grep " MADV_" /usr/include/bits/mman.h
> # define MADV_NORMAL 0 /* No further special treatment. */
> # define MADV_RANDOM 1 /* Expect random page references. */
> # define MADV_SEQUENTIAL 2 /* Expect sequential page references. */
> # define MADV_WILLNEED 3 /* Will need these pages. */
> # define MADV_DONTNEED 4 /* Don't need these pages. */
>
> /usr/include/asm comes from src/linux/include/asm.
>
> hrandoz@rushmore:/$ grep " MADV_" /usr/include/asm/mman.h
> #define MADV_NORMAL 0x0 /* default page-in behavior */
> #define MADV_RANDOM 0x1 /* page-in minimum required */
> #define MADV_SEQUENTIAL 0x2 /* read-ahead aggressively */
> #define MADV_WILLNEED 0x3 /* pre-fault pages */
> #define MADV_DONTNEED 0x4 /* discard these pages */
>
>
> Programs like mremap04.c from the Linux Test Project that include mman.h
> give a warning like:

Those programs should not include asm/mman.h. Just remove the
inclusion of that header and use only glibc's headers.

Andreas
--
Andreas Jaeger
SuSE Labs aj@suse.de
private aj@arthur.inka.de
http://www.suse.de/~aj
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