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[PATCH] linux-user: Do not treat madvise()'s advice as a bitmask
From: |
Ilya Leoshkevich |
Subject: |
[PATCH] linux-user: Do not treat madvise()'s advice as a bitmask |
Date: |
Mon, 25 Jul 2022 15:41:00 +0200 |
Advice is enum, not flags. Doing (advice & MADV_DONTNEED) also matches
e.g. MADV_MERGEABLE.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
linux-user/mmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 4e7a6be6ee..edceaca4a8 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -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));
}
--
2.35.3
- [PATCH] linux-user: Do not treat madvise()'s advice as a bitmask,
Ilya Leoshkevich <=