Commit 41c3e334 authored Jun 29, 2010 by Barry Song Committed by Mike Frysinger Oct 22, 2010

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>

parent 027285e8

arch/blackfin/kernel/process.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -493,6 +493,11 @@ int _access_ok(unsigned long addr, unsigned long size)
		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;