From 7f3caba522f4d24764f29d83aa2de9198bb7f01c Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 24 May 2024 06:52:22 +0200
Subject: Adding upstream version 6.8.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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-.\" Copyright (C) 2015 Michael Kerrisk <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: GPL-2.0-or-later
-.\"
-.TH posix_madvise 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-posix_madvise \- give advice about patterns of memory usage
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <sys/mman.h>
-.P
-.BI "int posix_madvise(void " addr [. len "], size_t " len ", int " advice );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR posix_madvise ():
-.nf
-    _POSIX_C_SOURCE >= 200112L
-.fi
-.SH DESCRIPTION
-The
-.BR posix_madvise ()
-function allows an application to advise the system about its expected
-patterns of usage of memory in the address range starting at
-.I addr
-and continuing for
-.I len
-bytes.
-The system is free to use this advice in order to improve the performance
-of memory accesses (or to ignore the advice altogether), but calling
-.BR posix_madvise ()
-shall not affect the semantics of access to memory in the specified range.
-.P
-The
-.I advice
-argument is one of the following:
-.TP
-.B POSIX_MADV_NORMAL
-The application has no special advice regarding its memory usage patterns
-for the specified address range.
-This is the default behavior.
-.TP
-.B POSIX_MADV_SEQUENTIAL
-The application expects to access the specified address range sequentially,
-running from lower addresses to higher addresses.
-Hence, pages in this region can be aggressively read ahead,
-and may be freed soon after they are accessed.
-.TP
-.B POSIX_MADV_RANDOM
-The application expects to access the specified address range randomly.
-Thus, read ahead may be less useful than normally.
-.TP
-.B POSIX_MADV_WILLNEED
-The application expects to access the specified address range
-in the near future.
-Thus, read ahead may be beneficial.
-.TP
-.B POSIX_MADV_DONTNEED
-The application expects that it will not access the specified address range
-in the near future.
-.SH RETURN VALUE
-On success,
-.BR posix_madvise ()
-returns 0.
-On failure, it returns a positive error number.
-.SH ERRORS
-.TP
-.B EINVAL
-.I addr
-is not a multiple of the system page size or
-.I len
-is negative.
-.TP
-.B EINVAL
-.I advice
-is invalid.
-.TP
-.B ENOMEM
-Addresses in the specified range are partially or completely outside
-the caller's address space.
-.SH VERSIONS
-POSIX.1 permits an implementation to generate an error if
-.I len
-is 0.
-On Linux, specifying
-.I len
-as 0 is permitted (as a successful no-op).
-.P
-In glibc, this function is implemented using
-.BR madvise (2).
-However, since glibc 2.6,
-.B POSIX_MADV_DONTNEED
-is treated as a no-op, because the corresponding
-.BR madvise (2)
-value,
-.BR MADV_DONTNEED ,
-has destructive semantics.
-.SH STANDARDS
-POSIX.1-2008.
-.SH HISTORY
-glibc 2.2.
-POSIX.1-2001.
-.SH SEE ALSO
-.BR madvise (2),
-.BR posix_fadvise (2)
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