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>

2 files changed, 10 insertions, 5 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);
diff --git a/arch/blackfin/mm/sram-alloc.c b/arch/blackfin/mm/sram-alloc.c
index 0f1ca6930c16..cc6f336e7313 100644
--- a/arch/blackfin/mm/sram-alloc.c
+++ b/arch/blackfin/mm/sram-alloc.c
@@ -183,10 +183,10 @@ static void __init l2_sram_init(void)
                 return;
         }
 
-        free_l2_sram_head.next->paddr = (void *)L2_START +
-                (_etext_l2 - _stext_l2) + (_edata_l2 - _sdata_l2);
-        free_l2_sram_head.next->size = L2_LENGTH -
-                (_etext_l2 - _stext_l2) + (_edata_l2 - _sdata_l2);
+        free_l2_sram_head.next->paddr =
+                (void *)L2_START + (_ebss_l2 - _stext_l2);
+        free_l2_sram_head.next->size =
+                L2_LENGTH - (_ebss_l2 - _stext_l2);
         free_l2_sram_head.next->pid = 0;
         free_l2_sram_head.next->next = NULL;