Blackfin arch: fix bug - shared lib function in L2 failed be called

Allow user space to access L2 SRAM.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index 77800dd83e57..0c3ea118b657 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -351,10 +351,15 @@ int _access_ok(unsigned long addr, unsigned long size)
                 return 1;
 #endif
 #if L1_DATA_B_LENGTH != 0
-        if (addr >= L1_DATA_B_START
+        if (addr >= L1_DATA_B_START + (_ebss_b_l1 - _sdata_b_l1)
             && addr + size <= L1_DATA_B_START + L1_DATA_B_LENGTH)
                 return 1;
 #endif
+#if L2_LENGTH != 0
+        if (addr >= L2_START + (_ebss_l2 - _stext_l2)
+            && addr + size <= L2_START + L2_LENGTH)
+                return 1;
+#endif
         return 0;
 }
 EXPORT_SYMBOL(_access_ok);