[IA64] Change SET_PERSONALITY to comply with comment in binfmt_elf.c.

We have a customer application which trips a bug.  The problem arises
when a driver attempts to call do_munmap on an area which is mapped, but
because current->thread.task_size has been set to 0xC0000000, the call
to do_munmap fails thinking it is an unmap beyond the user's address
space.

The comment in fs/binfmt_elf.c in load_elf_library() before the call
to SET_PERSONALITY() indicates that task_size must not be changed for
the running application until flush_thread, but is for ia64 executing
ia32 binaries.

This patch moves the setting of task_size from SET_PERSONALITY() to
flush_thread() as indicated.  The customer application no longer is able
to trip the bug.

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/asm-ia64/ia32.h b/include/asm-ia64/ia32.h
index 8e746b2413a6..f8044a1169cd 100644
--- a/include/asm-ia64/ia32.h
+++ b/include/asm-ia64/ia32.h
@@ -13,6 +13,8 @@
 
 # ifdef CONFIG_IA32_SUPPORT
 
+#define IA32_PAGE_OFFSET        0xc0000000
+
 extern void ia32_cpu_init (void);
 extern void ia32_mem_init (void);
 extern void ia32_gdt_init (void);