commit 8f65873e47784a390949f0d61e5692dbf2a8253e
author Graf Yang <graf.yang@analog.com> Tue Nov 18 17:48:22 2008 +0800
committer Bryan Wu <cooloney@kernel.org> Tue Nov 18 17:48:22 2008 +0800
tree 4d9509bf5e52ebac190d79de04b783829d44f49e
parent b8a989893cbdeb6c97a7b5af5f38fb0e480235f9

Blackfin arch: SMP supporting patchset: Blackfin kernel and memory management code

Blackfin dual core BF561 processor can support SMP like features.
https://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:smp-like

In this patch, we provide SMP extend to Blackfin kernel and memory management code

Singed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/kernel/process.c

diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index 326e301..4359ea2 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -171,6 +171,13 @@
 	unsigned long clone_flags;
 	unsigned long newsp;
 
+#ifdef __ARCH_SYNC_CORE_DCACHE
+	if (current->rt.nr_cpus_allowed == num_possible_cpus()) {
+		current->cpus_allowed = cpumask_of_cpu(smp_processor_id());
+		current->rt.nr_cpus_allowed = 1;
+	}
+#endif
+
 	/* syscall2 puts clone_flags in r0 and usp in r1 */
 	clone_flags = regs->r0;
 	newsp = regs->r1;
@@ -338,22 +345,22 @@
 	if (addr >= (unsigned long)__init_begin &&
 	    addr + size <= (unsigned long)__init_end)
 		return 1;
-	if (addr >= L1_SCRATCH_START
-	    && addr + size <= L1_SCRATCH_START + L1_SCRATCH_LENGTH)
+	if (addr >= get_l1_scratch_start()
+	    && addr + size <= get_l1_scratch_start() + L1_SCRATCH_LENGTH)
 		return 1;
 #if L1_CODE_LENGTH != 0
-	if (addr >= L1_CODE_START + (_etext_l1 - _stext_l1)
-	    && addr + size <= L1_CODE_START + L1_CODE_LENGTH)
+	if (addr >= get_l1_code_start() + (_etext_l1 - _stext_l1)
+	    && addr + size <= get_l1_code_start() + L1_CODE_LENGTH)
 		return 1;
 #endif
 #if L1_DATA_A_LENGTH != 0
-	if (addr >= L1_DATA_A_START + (_ebss_l1 - _sdata_l1)
-	    && addr + size <= L1_DATA_A_START + L1_DATA_A_LENGTH)
+	if (addr >= get_l1_data_a_start() + (_ebss_l1 - _sdata_l1)
+	    && addr + size <= get_l1_data_a_start() + L1_DATA_A_LENGTH)
 		return 1;
 #endif
 #if L1_DATA_B_LENGTH != 0
-	if (addr >= L1_DATA_B_START + (_ebss_b_l1 - _sdata_b_l1)
-	    && addr + size <= L1_DATA_B_START + L1_DATA_B_LENGTH)
+	if (addr >= get_l1_data_b_start() + (_ebss_b_l1 - _sdata_b_l1)
+	    && addr + size <= get_l1_data_b_start() + L1_DATA_B_LENGTH)
 		return 1;
 #endif
 #if L2_LENGTH != 0