Blackfin: access_ok: permit L1 stack
When apps run with their stack in L1, some system calls might be made
where a buffer is in the stack as an argument. So make sure the core
Blackfin access code does not reject this memory location.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index c86a3ed..cd0c090 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -493,6 +493,11 @@
return 1;
#endif
+#ifndef CONFIG_EXCEPTION_L1_SCRATCH
+ if (in_mem_const(addr, size, (unsigned long)l1_stack_base, l1_stack_len))
+ return 1;
+#endif
+
aret = in_async(addr, size);
if (aret < 2)
return aret;
