[Qemu-devel] [PATCH v8 09/54] Add QEMU_MADV_NOHUGEPAGE

[Dr. David Alan Gilbert (git)]

From: "Dr. David Alan Gilbert" <address@hidden>

Add QEMU_MADV_NOHUGEPAGE as an OS-independent version of
MADV_NOHUGEPAGE.

We include sys/mman.h before making the test to ensure
that we pick up the system defines.

Signed-off-by: Dr. David Alan Gilbert <address@hidden>
---
 include/qemu/osdep.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index ab3c876..7d471f6 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -135,6 +135,8 @@ void qemu_anon_ram_free(void *ptr, size_t size);
 
 #if defined(CONFIG_MADVISE)
 
+#include <sys/mman.h>
+
 #define QEMU_MADV_WILLNEED  MADV_WILLNEED
 #define QEMU_MADV_DONTNEED  MADV_DONTNEED
 #ifdef MADV_DONTFORK
@@ -167,6 +169,11 @@ void qemu_anon_ram_free(void *ptr, size_t size);
 #else
 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
 #endif
+#ifdef MADV_NOHUGEPAGE
+#define QEMU_MADV_NOHUGEPAGE MADV_NOHUGEPAGE
+#else
+#define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID
+#endif
 
 #elif defined(CONFIG_POSIX_MADVISE)
 
@@ -178,6 +185,7 @@ void qemu_anon_ram_free(void *ptr, size_t size);
 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
+#define QEMU_MADV_NOHUGEPAGE  QEMU_MADV_INVALID
 
 #else /* no-op */
 
@@ -189,6 +197,7 @@ void qemu_anon_ram_free(void *ptr, size_t size);
 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
 #define QEMU_MADV_HUGEPAGE  QEMU_MADV_INVALID
+#define QEMU_MADV_NOHUGEPAGE  QEMU_MADV_INVALID
 
 #endif
 
-- 
2.5.0