Blackfin arch: add link-time asserts to make sure on-chip regions dont overflow

Signed-off-by: NMike Frysinger <vapier.adi@gmail.com>
Signed-off-by: NBryan Wu <cooloney@kernel.org>

arch/blackfin/kernel/vmlinux.lds.S

@@ -183,6 +183,7 @@ SECTIONS
 		. = ALIGN(4);
 		__etext_l1 = .;
 	}
+	ASSERT (SIZEOF(.text_l1) <= L1_CODE_LENGTH, "L1 text overflow!")
 
 	.data_l1 L1_DATA_A_START : AT(LOADADDR(.text_l1) + SIZEOF(.text_l1))
 	{
@@ -200,6 +201,7 @@ SECTIONS
 		. = ALIGN(4);
 		__ebss_l1 = .;
 	}
+	ASSERT (SIZEOF(.data_a_l1) <= L1_DATA_A_LENGTH, "L1 data A overflow!")
 
 	.data_b_l1 L1_DATA_B_START : AT(LOADADDR(.data_l1) + SIZEOF(.data_l1))
 	{
@@ -214,6 +216,7 @@ SECTIONS
 		. = ALIGN(4);
 		__ebss_b_l1 = .;
 	}
+	ASSERT (SIZEOF(.data_b_l1) <= L1_DATA_B_LENGTH, "L1 data B overflow!")
 
 	__l2_lma_start = LOADADDR(.data_b_l1) + SIZEOF(.data_b_l1);
 
@@ -239,6 +242,7 @@ SECTIONS
 		. = ALIGN(4);
 		__ebss_l2 = .;
 	}
+	ASSERT (SIZEOF(.text_data_l1) <= L2_LENGTH, "L2 overflow!")
 
 	/* Force trailing alignment of our init section so that when we
 	 * free our init memory, we don't leave behind a partial page.