2.6.25-stable review patch. If anyone has any objections, please let us know.
------------------
From: Jeff Dike <[EMAIL PROTECTED]>
commit 60a2988aea701a6424809a5432bf068667aac177 upstream
The top of physical memory should be below the initial process stack, not the
top of the address space, at least for as long as the stack isn't known to the
kernel VM system and appropriately reserved.
Cc: "Christopher S. Aker" <[EMAIL PROTECTED]>
Signed-off-by: Jeff Dike <[EMAIL PROTECTED]>
Cc: WANG Cong <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
arch/um/kernel/um_arch.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -259,6 +259,7 @@ int __init linux_main(int argc, char **a
unsigned long avail, diff;
unsigned long virtmem_size, max_physmem;
unsigned int i, add;
+ unsigned long stack;
char * mode;
for (i = 1; i < argc; i++) {
@@ -347,7 +348,9 @@ int __init linux_main(int argc, char **a
}
virtmem_size = physmem_size;
- avail = TASK_SIZE - start_vm;
+ stack = (unsigned long) argv;
+ stack &= ~(1024 * 1024 - 1);
+ avail = stack - start_vm;
if (physmem_size > avail)
virtmem_size = avail;
end_vm = start_vm + virtmem_size;
--
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