[SPARC64]: Increase top of 32-bit process stack.

Put it one page below the top of the 32-bit address space.
This gives us ~16MB more address space to work with.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 4 deletions

diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c
index 417727bd87ba..0e41df024489 100644
--- a/arch/sparc64/kernel/sys_sparc32.c
+++ b/arch/sparc64/kernel/sys_sparc32.c
@@ -62,6 +62,7 @@
 #include <asm/fpumacro.h>
 #include <asm/semaphore.h>
 #include <asm/mmu_context.h>
+#include <asm/a.out.h>
 
 asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
 {
@@ -1039,15 +1040,15 @@ asmlinkage unsigned long sys32_mremap(unsigned long addr,
         unsigned long ret = -EINVAL;
         unsigned long new_addr = __new_addr;
 
-        if (old_len > 0xf0000000UL || new_len > 0xf0000000UL)
+        if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
                 goto out;
-        if (addr > 0xf0000000UL - old_len)
+        if (addr > STACK_TOP32 - old_len)
                 goto out;
         down_write(&current->mm->mmap_sem);
         if (flags & MREMAP_FIXED) {
-                if (new_addr > 0xf0000000UL - new_len)
+                if (new_addr > STACK_TOP32 - new_len)
                         goto out_sem;
-        } else if (addr > 0xf0000000UL - new_len) {
+        } else if (addr > STACK_TOP32 - new_len) {
                 unsigned long map_flags = 0;
                 struct file *file = NULL;