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linux-user: Do not treat madvise()'s advice as a bitmask 

Advice is enum, not flags. Doing (advice & MADV_DONTNEED) also matches
e.g. MADV_MERGEABLE.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220725134100.128035-1-iii@linux.ibm.com>
Fixes: 892a4f6a75 ("linux-user: Add partial support for MADV_DONTNEED")
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
master
Ilya Leoshkevich 2022-07-25 15:41:00 +02:00 committed by Laurent Vivier
parent 734a659ad2
commit f71fa4e3bb
1 changed files with 1 additions and 1 deletions
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2
linux-user/mmap.c
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@ -891,7 +891,7 @@ abi_long target_madvise(abi_ulong start, abi_ulong len_in, int advice)
* anonymous mappings. In this case passthrough is safe, so do it.
*/
mmap_lock();
if ((advice & MADV_DONTNEED) &&
if (advice == MADV_DONTNEED &&
can_passthrough_madv_dontneed(start, end)) {
ret = get_errno(madvise(g2h_untagged(start), len, MADV_DONTNEED));
}