[PATCH] uml: MADV_REMOVE fixes

MADV_REMOVE fixes - change the test mapping to be MAP_SHARED instead of
MAP_PRIVATE, as MADV_REMOVE on MAP_PRIVATE maps won't work.  Also, use
the kernel's definition of MADV_REMOVE instead of hardcoding it if there
isn't a libc definition.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 4 insertions, 0 deletions

diff --git a/arch/um/include/sysdep-i386/kernel-offsets.h b/arch/um/include/sysdep-i386/kernel-offsets.h
index 82f96c574144..2c13de321f2f 100644
--- a/arch/um/include/sysdep-i386/kernel-offsets.h
+++ b/arch/um/include/sysdep-i386/kernel-offsets.h
@@ -1,6 +1,7 @@
 #include <linux/stddef.h>
 #include <linux/sched.h>
 #include <linux/elf.h>
+#include <asm/mman.h>
 
 #define DEFINE(sym, val) \
         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
@@ -16,6 +17,7 @@
 void foo(void)
 {
         OFFSET(HOST_TASK_DEBUGREGS, task_struct, thread.arch.debugregs);
+        DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);
 #ifdef CONFIG_MODE_TT
         OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
 #endif
diff --git a/arch/um/include/sysdep-x86_64/kernel-offsets.h b/arch/um/include/sysdep-x86_64/kernel-offsets.h
index 5ce93abd0b54..939cc475757a 100644
--- a/arch/um/include/sysdep-x86_64/kernel-offsets.h
+++ b/arch/um/include/sysdep-x86_64/kernel-offsets.h
@@ -4,6 +4,7 @@
 #include <linux/time.h>
 #include <linux/elf.h>
 #include <asm/page.h>
+#include <asm/mman.h>
 
 #define DEFINE(sym, val) \
         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
@@ -18,6 +19,7 @@
 
 void foo(void)
 {
+        DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);
 #ifdef CONFIG_MODE_TT
         OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
 #endif