From edd8a97e6e89ee2edc86e21db6253a73741f3c72 Mon Sep 17 00:00:00 2001
From: Barry Song <barry.song@analog.com>
Date: Tue, 29 Jun 2010 08:55:29 +0000
Subject: blackfin: restore L1 base address and length

Restore L1 base address and length to 0 after free else the value will be
wrong.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>

diff --git a/arch/blackfin/include/asm/mmu_context.h b/arch/blackfin/include/asm/mmu_context.h
index 3828c70..15b16d3 100644
--- a/arch/blackfin/include/asm/mmu_context.h
+++ b/arch/blackfin/include/asm/mmu_context.h
@@ -30,8 +30,11 @@ extern void *l1sram_alloc_max(void*);
 static inline void free_l1stack(void)
 {
 	nr_l1stack_tasks--;
-	if (nr_l1stack_tasks == 0)
+	if (nr_l1stack_tasks == 0) {
 		l1sram_free(l1_stack_base);
+		l1_stack_base = NULL;
+		l1_stack_len = 0;
+	}
 }
 
 static inline unsigned long
-- 
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