diff mbox series

[PULL,2/3] linux-user: Do not treat madvise()'s advice as a bitmask

Message ID 20220803145613.428167-3-laurent@vivier.eu
State New
Headers show
Series [PULL,1/3] linux-user/flatload.c: Fix setting of image_info::end_code | expand

Commit Message

Laurent Vivier Aug. 3, 2022, 2:56 p.m. UTC 
From: Ilya Leoshkevich <iii@linux.ibm.com>

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: 892a4f6a750a ("linux-user: Add partial support for MADV_DONTNEED")
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 linux-user/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 4e7a6be6ee19..edceaca4a8e1 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));
     }