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qemu/osdep: Remove fallback for MAP_FIXED_NOREPLACE 

In order for our emulation of MAP_FIXED_NOREPLACE to succeed within
linux-user target_mmap, we require a non-zero value.  This does not
require host kernel support, merely the bit being defined.

MAP_FIXED_NOREPLACE was added with glibc 2.28.  From repology.org:

                  Fedora 36: 2.35
          CentOS 8 (RHEL-8): 2.28
                  Debian 11: 2.31
         OpenSUSE Leap 15.4: 2.31
           Ubuntu LTS 20.04: 2.31

Reported-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230808164418.69989-1-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-08-08 09:44:18 -07:00
parent 32e07fddc6
commit c42e77a90d
1 changed files with 0 additions and 3 deletions
include/qemu
osdep.h

3
include/qemu/osdep.h
View File

@ -289,9 +289,6 @@ void QEMU_ERROR("code path is reachable")
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
#ifndef MAP_FIXED_NOREPLACE
#define MAP_FIXED_NOREPLACE 0
#endif
#ifndef MAP_NORESERVE
#define MAP_NORESERVE 0
#endif