Merge ../linux-2.6-watchdog-mm

[pandora-kernel.git] / arch / powerpc / kernel / signal_32.c

diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 320353f..6b405a3 100644 (file)
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -36,7 +36,7 @@
 #include <linux/stddef.h>
 #include <linux/tty.h>
 #include <linux/binfmts.h>
-#include <linux/suspend.h>
+#include <linux/freezer.h>
 #endif
 
 #include <asm/uaccess.h>
@@ -835,11 +835,21 @@ long sys_swapcontext(struct ucontext __user *old_ctx,
                return -EINVAL;
 
        if (old_ctx != NULL) {
+               struct mcontext __user *mctx;
+
+               /*
+                * old_ctx might not be 16-byte aligned, in which
+                * case old_ctx->uc_mcontext won't be either.
+                * Because we have the old_ctx->uc_pad2 field
+                * before old_ctx->uc_mcontext, we need to round down
+                * from &old_ctx->uc_mcontext to a 16-byte boundary.
+                */
+               mctx = (struct mcontext __user *)
+                       ((unsigned long) &old_ctx->uc_mcontext & ~0xfUL);
                if (!access_ok(VERIFY_WRITE, old_ctx, sizeof(*old_ctx))
-                   || save_user_regs(regs, &old_ctx->uc_mcontext, 0)
+                   || save_user_regs(regs, mctx, 0)
                    || put_sigset_t(&old_ctx->uc_sigmask, &current->blocked)
-                   || __put_user(to_user_ptr(&old_ctx->uc_mcontext),
-                           &old_ctx->uc_regs))
+                   || __put_user(to_user_ptr(mctx), &old_ctx->uc_regs))
                        return -EFAULT;
        }
        if (new_ctx == NULL)