summaryrefslogtreecommitdiff
path: root/include/linux/compat.h
diff options
context:
space:
mode:
authorAl Viro <viro@zeniv.linux.org.uk>2012-12-14 22:49:35 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-12-20 03:07:40 +0400
commit9b064fc3f95a8e44e929fdf4d6037334ea03d15b (patch)
treedd1a2a6075667841f88b1ea8b62f4df2e18c3c68 /include/linux/compat.h
parent5c49574ffd7ac07eae8c3b065d19e6ebc7e4760f (diff)
downloadlinux-9b064fc3f95a8e44e929fdf4d6037334ea03d15b.tar.xz
new helper: compat_user_stack_pointer()
Compat counterpart of current_user_stack_pointer(); for most of the biarch architectures those two are identical, but e.g. arm64 and arm use different registers for stack pointer... Note that amd64 variants of current_user_stack_pointer/compat_user_stack_pointer do *not* rely on pt_regs having been through FIXUP_TOP_OF_STACK. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/compat.h')
-rw-r--r--include/linux/compat.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h
index a7877fa809fd..62bb76f91baf 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -65,6 +65,9 @@
#endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */
+#ifndef compat_user_stack_pointer
+#define compat_user_stack_pointer() current_user_stack_pointer()
+#endif
#define compat_jiffies_to_clock_t(x) \
(((unsigned long)(x) * COMPAT_USER_HZ) / HZ)