diff --git a/Documentation/features/core/cBPF-JIT/arch-support.txt b/Documentation/features/core/cBPF-JIT/arch-support.txt
index 90459cdde314..8620c38d4db0 100644
--- a/Documentation/features/core/cBPF-JIT/arch-support.txt
+++ b/Documentation/features/core/cBPF-JIT/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: | TODO |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/core/eBPF-JIT/arch-support.txt b/Documentation/features/core/eBPF-JIT/arch-support.txt
index c90a0382fe66..9ae6e8d0d10d 100644
--- a/Documentation/features/core/eBPF-JIT/arch-support.txt
+++ b/Documentation/features/core/eBPF-JIT/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/core/generic-idle-thread/arch-support.txt b/Documentation/features/core/generic-idle-thread/arch-support.txt
index 0ef6acdb991c..365df2c2ff0b 100644
--- a/Documentation/features/core/generic-idle-thread/arch-support.txt
+++ b/Documentation/features/core/generic-idle-thread/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: |  ok  |
     |       h8300: | TODO |
     |     hexagon: |  ok  |
     |        ia64: |  ok  |
diff --git a/Documentation/features/core/jump-labels/arch-support.txt b/Documentation/features/core/jump-labels/arch-support.txt
index 60111395f932..7fc2e243dee9 100644
--- a/Documentation/features/core/jump-labels/arch-support.txt
+++ b/Documentation/features/core/jump-labels/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/core/tracehook/arch-support.txt b/Documentation/features/core/tracehook/arch-support.txt
index f44c274e40ed..d344b99aae1e 100644
--- a/Documentation/features/core/tracehook/arch-support.txt
+++ b/Documentation/features/core/tracehook/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: |  ok  |
+    |        csky: |  ok  |
     |       h8300: | TODO |
     |     hexagon: |  ok  |
     |        ia64: |  ok  |
diff --git a/Documentation/features/debug/KASAN/arch-support.txt b/Documentation/features/debug/KASAN/arch-support.txt
index 282ecc8ea1da..304dcd461795 100644
--- a/Documentation/features/debug/KASAN/arch-support.txt
+++ b/Documentation/features/debug/KASAN/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/debug/gcov-profile-all/arch-support.txt b/Documentation/features/debug/gcov-profile-all/arch-support.txt
index 01b2b3004e0a..059d58a549c7 100644
--- a/Documentation/features/debug/gcov-profile-all/arch-support.txt
+++ b/Documentation/features/debug/gcov-profile-all/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/debug/kgdb/arch-support.txt b/Documentation/features/debug/kgdb/arch-support.txt
index 3b4dff22329f..3e6b8f07d5d0 100644
--- a/Documentation/features/debug/kgdb/arch-support.txt
+++ b/Documentation/features/debug/kgdb/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: |  ok  |
     |     hexagon: |  ok  |
     |        ia64: | TODO |
diff --git a/Documentation/features/debug/kprobes-on-ftrace/arch-support.txt b/Documentation/features/debug/kprobes-on-ftrace/arch-support.txt
index 7e963d0ae646..68f266944d5f 100644
--- a/Documentation/features/debug/kprobes-on-ftrace/arch-support.txt
+++ b/Documentation/features/debug/kprobes-on-ftrace/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: | TODO |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/debug/kprobes/arch-support.txt b/Documentation/features/debug/kprobes/arch-support.txt
index 4ada027faf16..f4e45bd58fea 100644
--- a/Documentation/features/debug/kprobes/arch-support.txt
+++ b/Documentation/features/debug/kprobes/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ok  |
diff --git a/Documentation/features/debug/kretprobes/arch-support.txt b/Documentation/features/debug/kretprobes/arch-support.txt
index 044e13fcca5d..1d5651ef11f8 100644
--- a/Documentation/features/debug/kretprobes/arch-support.txt
+++ b/Documentation/features/debug/kretprobes/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ok  |
diff --git a/Documentation/features/debug/optprobes/arch-support.txt b/Documentation/features/debug/optprobes/arch-support.txt
index dce7669c918f..fb297a88f62c 100644
--- a/Documentation/features/debug/optprobes/arch-support.txt
+++ b/Documentation/features/debug/optprobes/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: | TODO |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/debug/stackprotector/arch-support.txt b/Documentation/features/debug/stackprotector/arch-support.txt
index 954ac1c95553..9999ea521f3e 100644
--- a/Documentation/features/debug/stackprotector/arch-support.txt
+++ b/Documentation/features/debug/stackprotector/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/debug/uprobes/arch-support.txt b/Documentation/features/debug/uprobes/arch-support.txt
index 1a3f9d3229bf..1c577d0cfc7f 100644
--- a/Documentation/features/debug/uprobes/arch-support.txt
+++ b/Documentation/features/debug/uprobes/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/debug/user-ret-profiler/arch-support.txt b/Documentation/features/debug/user-ret-profiler/arch-support.txt
index 1d78d1069a5f..6bfa36b0e017 100644
--- a/Documentation/features/debug/user-ret-profiler/arch-support.txt
+++ b/Documentation/features/debug/user-ret-profiler/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: | TODO |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/io/dma-contiguous/arch-support.txt b/Documentation/features/io/dma-contiguous/arch-support.txt
index 30c072d2b67c..eb28b5c97ca6 100644
--- a/Documentation/features/io/dma-contiguous/arch-support.txt
+++ b/Documentation/features/io/dma-contiguous/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: |  ok  |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/locking/cmpxchg-local/arch-support.txt b/Documentation/features/locking/cmpxchg-local/arch-support.txt
index 51704a2dc8d1..242ff5a6586e 100644
--- a/Documentation/features/locking/cmpxchg-local/arch-support.txt
+++ b/Documentation/features/locking/cmpxchg-local/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/locking/lockdep/arch-support.txt b/Documentation/features/locking/lockdep/arch-support.txt
index bd39c5edd460..941fd5b1094d 100644
--- a/Documentation/features/locking/lockdep/arch-support.txt
+++ b/Documentation/features/locking/lockdep/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: |  ok  |
     |        ia64: | TODO |
diff --git a/Documentation/features/locking/queued-rwlocks/arch-support.txt b/Documentation/features/locking/queued-rwlocks/arch-support.txt
index da7aff3bee0b..c683da198f31 100644
--- a/Documentation/features/locking/queued-rwlocks/arch-support.txt
+++ b/Documentation/features/locking/queued-rwlocks/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: |  ok  |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/locking/queued-spinlocks/arch-support.txt b/Documentation/features/locking/queued-spinlocks/arch-support.txt
index 478e9101322c..e3080b82aefd 100644
--- a/Documentation/features/locking/queued-spinlocks/arch-support.txt
+++ b/Documentation/features/locking/queued-spinlocks/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: | TODO |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/locking/rwsem-optimized/arch-support.txt b/Documentation/features/locking/rwsem-optimized/arch-support.txt
index e54b1f1a8091..7521d7500fbe 100644
--- a/Documentation/features/locking/rwsem-optimized/arch-support.txt
+++ b/Documentation/features/locking/rwsem-optimized/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ok  |
diff --git a/Documentation/features/perf/kprobes-event/arch-support.txt b/Documentation/features/perf/kprobes-event/arch-support.txt
index 7331402d1887..d8278bf62b85 100644
--- a/Documentation/features/perf/kprobes-event/arch-support.txt
+++ b/Documentation/features/perf/kprobes-event/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: |  ok  |
     |        ia64: | TODO |
diff --git a/Documentation/features/perf/perf-regs/arch-support.txt b/Documentation/features/perf/perf-regs/arch-support.txt
index 53feeee6cdad..687d049d9cee 100644
--- a/Documentation/features/perf/perf-regs/arch-support.txt
+++ b/Documentation/features/perf/perf-regs/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/perf/perf-stackdump/arch-support.txt b/Documentation/features/perf/perf-stackdump/arch-support.txt
index 16164348e0ea..90996e3d18a8 100644
--- a/Documentation/features/perf/perf-stackdump/arch-support.txt
+++ b/Documentation/features/perf/perf-stackdump/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/sched/membarrier-sync-core/arch-support.txt b/Documentation/features/sched/membarrier-sync-core/arch-support.txt
index c7858dd1ea8f..8a521a622966 100644
--- a/Documentation/features/sched/membarrier-sync-core/arch-support.txt
+++ b/Documentation/features/sched/membarrier-sync-core/arch-support.txt
@@ -34,6 +34,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/sched/numa-balancing/arch-support.txt b/Documentation/features/sched/numa-balancing/arch-support.txt
index c68bb2c2cb62..350823692f28 100644
--- a/Documentation/features/sched/numa-balancing/arch-support.txt
+++ b/Documentation/features/sched/numa-balancing/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ..  |
     |       arm64: |  ok  |
     |         c6x: |  ..  |
+    |        csky: |  ..  |
     |       h8300: |  ..  |
     |     hexagon: |  ..  |
     |        ia64: | TODO |
diff --git a/Documentation/features/seccomp/seccomp-filter/arch-support.txt b/Documentation/features/seccomp/seccomp-filter/arch-support.txt
index d4271b493b41..4fe6c3c3be5c 100644
--- a/Documentation/features/seccomp/seccomp-filter/arch-support.txt
+++ b/Documentation/features/seccomp/seccomp-filter/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/time/arch-tick-broadcast/arch-support.txt b/Documentation/features/time/arch-tick-broadcast/arch-support.txt
index 83d9e68462bb..593536f7925b 100644
--- a/Documentation/features/time/arch-tick-broadcast/arch-support.txt
+++ b/Documentation/features/time/arch-tick-broadcast/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/time/clockevents/arch-support.txt b/Documentation/features/time/clockevents/arch-support.txt
index 3d4908fce6da..7a27157da408 100644
--- a/Documentation/features/time/clockevents/arch-support.txt
+++ b/Documentation/features/time/clockevents/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: |  ok  |
+    |        csky: |  ok  |
     |       h8300: |  ok  |
     |     hexagon: |  ok  |
     |        ia64: | TODO |
diff --git a/Documentation/features/time/context-tracking/arch-support.txt b/Documentation/features/time/context-tracking/arch-support.txt
index c29974afffaa..048bfb6d3872 100644
--- a/Documentation/features/time/context-tracking/arch-support.txt
+++ b/Documentation/features/time/context-tracking/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/time/irq-time-acct/arch-support.txt b/Documentation/features/time/irq-time-acct/arch-support.txt
index 8d73c463ec27..a14bbad8e948 100644
--- a/Documentation/features/time/irq-time-acct/arch-support.txt
+++ b/Documentation/features/time/irq-time-acct/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ..  |
diff --git a/Documentation/features/time/modern-timekeeping/arch-support.txt b/Documentation/features/time/modern-timekeeping/arch-support.txt
index e7c6ea6b8fb3..2855dfe2464d 100644
--- a/Documentation/features/time/modern-timekeeping/arch-support.txt
+++ b/Documentation/features/time/modern-timekeeping/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: |  ok  |
     |         c6x: |  ok  |
+    |        csky: |  ok  |
     |       h8300: |  ok  |
     |     hexagon: |  ok  |
     |        ia64: |  ok  |
diff --git a/Documentation/features/time/virt-cpuacct/arch-support.txt b/Documentation/features/time/virt-cpuacct/arch-support.txt
index 4646457461cf..fb0d0cab9cab 100644
--- a/Documentation/features/time/virt-cpuacct/arch-support.txt
+++ b/Documentation/features/time/virt-cpuacct/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ok  |
diff --git a/Documentation/features/vm/ELF-ASLR/arch-support.txt b/Documentation/features/vm/ELF-ASLR/arch-support.txt
index 1f71d090ff2c..adc25878d217 100644
--- a/Documentation/features/vm/ELF-ASLR/arch-support.txt
+++ b/Documentation/features/vm/ELF-ASLR/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/vm/PG_uncached/arch-support.txt b/Documentation/features/vm/PG_uncached/arch-support.txt
index fbd5aa463b0a..f05588f9e4b4 100644
--- a/Documentation/features/vm/PG_uncached/arch-support.txt
+++ b/Documentation/features/vm/PG_uncached/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: | TODO |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ok  |
diff --git a/Documentation/features/vm/THP/arch-support.txt b/Documentation/features/vm/THP/arch-support.txt
index 5d7ecc378f29..cdfe8925f881 100644
--- a/Documentation/features/vm/THP/arch-support.txt
+++ b/Documentation/features/vm/THP/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: |  ..  |
+    |        csky: |  ..  |
     |       h8300: |  ..  |
     |     hexagon: |  ..  |
     |        ia64: | TODO |
diff --git a/Documentation/features/vm/TLB/arch-support.txt b/Documentation/features/vm/TLB/arch-support.txt
index f7af9678eb66..2bdd3b6cee3c 100644
--- a/Documentation/features/vm/TLB/arch-support.txt
+++ b/Documentation/features/vm/TLB/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: | TODO |
     |         c6x: |  ..  |
+    |        csky: | TODO |
     |       h8300: |  ..  |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/vm/huge-vmap/arch-support.txt b/Documentation/features/vm/huge-vmap/arch-support.txt
index d0713ccc7117..019131c5acce 100644
--- a/Documentation/features/vm/huge-vmap/arch-support.txt
+++ b/Documentation/features/vm/huge-vmap/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/vm/ioremap_prot/arch-support.txt b/Documentation/features/vm/ioremap_prot/arch-support.txt
index 326e4797bc65..3a6b87de6a19 100644
--- a/Documentation/features/vm/ioremap_prot/arch-support.txt
+++ b/Documentation/features/vm/ioremap_prot/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: | TODO |
     |       arm64: | TODO |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/Documentation/features/vm/numa-memblock/arch-support.txt b/Documentation/features/vm/numa-memblock/arch-support.txt
index 1a988052cd24..3004beb0fd71 100644
--- a/Documentation/features/vm/numa-memblock/arch-support.txt
+++ b/Documentation/features/vm/numa-memblock/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ..  |
     |       arm64: |  ok  |
     |         c6x: |  ..  |
+    |        csky: |  ..  |
     |       h8300: |  ..  |
     |     hexagon: |  ..  |
     |        ia64: |  ok  |
diff --git a/Documentation/features/vm/pte_special/arch-support.txt b/Documentation/features/vm/pte_special/arch-support.txt
index a8378424bc98..2dc5df6a1cf5 100644
--- a/Documentation/features/vm/pte_special/arch-support.txt
+++ b/Documentation/features/vm/pte_special/arch-support.txt
@@ -11,6 +11,7 @@
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |         c6x: | TODO |
+    |        csky: | TODO |
     |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
diff --git a/arch/csky/include/asm/io.h b/arch/csky/include/asm/io.h
index ecae6b358f95..c1dfa9c10e36 100644
--- a/arch/csky/include/asm/io.h
+++ b/arch/csky/include/asm/io.h
@@ -15,6 +15,31 @@ extern void iounmap(void *addr);
 extern int remap_area_pages(unsigned long address, phys_addr_t phys_addr,
 		size_t size, unsigned long flags);
 
+/*
+ * I/O memory access primitives. Reads are ordered relative to any
+ * following Normal memory access. Writes are ordered relative to any prior
+ * Normal memory access.
+ *
+ * For CACHEV1 (807, 810), store instruction could fast retire, so we need
+ * another mb() to prevent st fast retire.
+ *
+ * For CACHEV2 (860), store instruction with PAGE_ATTR_NO_BUFFERABLE won't
+ * fast retire.
+ */
+#define readb(c)		({ u8  __v = readb_relaxed(c); rmb(); __v; })
+#define readw(c)		({ u16 __v = readw_relaxed(c); rmb(); __v; })
+#define readl(c)		({ u32 __v = readl_relaxed(c); rmb(); __v; })
+
+#ifdef CONFIG_CPU_HAS_CACHEV2
+#define writeb(v,c)		({ wmb(); writeb_relaxed((v),(c)); })
+#define writew(v,c)		({ wmb(); writew_relaxed((v),(c)); })
+#define writel(v,c)		({ wmb(); writel_relaxed((v),(c)); })
+#else
+#define writeb(v,c)		({ wmb(); writeb_relaxed((v),(c)); mb(); })
+#define writew(v,c)		({ wmb(); writew_relaxed((v),(c)); mb(); })
+#define writel(v,c)		({ wmb(); writel_relaxed((v),(c)); mb(); })
+#endif
+
 #define ioremap_nocache(phy, sz)	ioremap(phy, sz)
 #define ioremap_wc ioremap_nocache
 #define ioremap_wt ioremap_nocache
diff --git a/arch/csky/include/asm/pgalloc.h b/arch/csky/include/asm/pgalloc.h
index bf4f4a0e140e..d213bb47b717 100644
--- a/arch/csky/include/asm/pgalloc.h
+++ b/arch/csky/include/asm/pgalloc.h
@@ -24,41 +24,34 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
 
 extern void pgd_init(unsigned long *p);
 
-static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
-					unsigned long address)
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
 {
 	pte_t *pte;
-	unsigned long *kaddr, i;
+	unsigned long i;
 
-	pte = (pte_t *) __get_free_pages(GFP_KERNEL | __GFP_RETRY_MAYFAIL,
-					 PTE_ORDER);
-	kaddr = (unsigned long *)pte;
-	if (address & 0x80000000)
-		for (i = 0; i < (PAGE_SIZE/4); i++)
-			*(kaddr + i) = 0x1;
-	else
-		clear_page(kaddr);
+	pte = (pte_t *) __get_free_page(GFP_KERNEL);
+	if (!pte)
+		return NULL;
+
+	for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
+		(pte + i)->pte_low = _PAGE_GLOBAL;
 
 	return pte;
 }
 
-static inline struct page *pte_alloc_one(struct mm_struct *mm,
-						unsigned long address)
+static inline struct page *pte_alloc_one(struct mm_struct *mm)
 {
 	struct page *pte;
-	unsigned long *kaddr, i;
 
-	pte = alloc_pages(GFP_KERNEL | __GFP_RETRY_MAYFAIL, PTE_ORDER);
-	if (pte) {
-		kaddr = kmap_atomic(pte);
-		if (address & 0x80000000) {
-			for (i = 0; i < (PAGE_SIZE/4); i++)
-				*(kaddr + i) = 0x1;
-		} else
-			clear_page(kaddr);
-		kunmap_atomic(kaddr);
-		pgtable_page_ctor(pte);
+	pte = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
+	if (!pte)
+		return NULL;
+
+	if (!pgtable_page_ctor(pte)) {
+		__free_page(pte);
+		return NULL;
 	}
+
 	return pte;
 }
 
diff --git a/arch/csky/kernel/module.c b/arch/csky/kernel/module.c
index 65abab0c7a47..0b028ee3c764 100644
--- a/arch/csky/kernel/module.c
+++ b/arch/csky/kernel/module.c
@@ -12,7 +12,7 @@
 #include <linux/spinlock.h>
 #include <asm/pgtable.h>
 
-#if defined(__CSKYABIV2__)
+#ifdef CONFIG_CPU_CK810
 #define IS_BSR32(hi16, lo16)		(((hi16) & 0xFC00) == 0xE000)
 #define IS_JSRI32(hi16, lo16)		((hi16) == 0xEAE0)
 
@@ -25,6 +25,26 @@
 	*(uint16_t *)(addr) = 0xE8Fa;		\
 	*((uint16_t *)(addr) + 1) = 0x0000;	\
 } while (0)
+
+static void jsri_2_lrw_jsr(uint32_t *location)
+{
+	uint16_t location_tmp = (uint16_t *)location;
+
+	if (IS_BSR32(*location_tmp, *(location_tmp + 1)))
+		return;
+
+	if (IS_JSRI32(*location_tmp, *(location_tmp + 1))) {
+		/* jsri 0x...  --> lrw r26, 0x... */
+		CHANGE_JSRI_TO_LRW(location);
+		/* lsli r0, r0 --> jsr r26 */
+		SET_JSR32_R26(location + 1);
+	}
+}
+#else
+static void inline jsri_2_lrw_jsr(uint32_t *location)
+{
+	return;
+}
 #endif
 
 int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
@@ -35,9 +55,6 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
 	Elf32_Sym	*sym;
 	uint32_t	*location;
 	short		*temp;
-#if defined(__CSKYABIV2__)
-	uint16_t	*location_tmp;
-#endif
 
 	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
 		/* This is where to make the change */
@@ -59,18 +76,7 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
 		case R_CSKY_PCRELJSR_IMM11BY2:
 			break;
 		case R_CSKY_PCRELJSR_IMM26BY2:
-#if defined(__CSKYABIV2__)
-			location_tmp = (uint16_t *)location;
-			if (IS_BSR32(*location_tmp, *(location_tmp + 1)))
-				break;
-
-			if (IS_JSRI32(*location_tmp, *(location_tmp + 1))) {
-				/* jsri 0x...  --> lrw r26, 0x... */
-				CHANGE_JSRI_TO_LRW(location);
-				/* lsli r0, r0 --> jsr r26 */
-				SET_JSR32_R26(location + 1);
-			}
-#endif
+			jsri_2_lrw_jsr(location);
 			break;
 		case R_CSKY_ADDR_HI16:
 			temp = ((short  *)location) + 1;
diff --git a/drivers/irqchip/irq-csky-apb-intc.c b/drivers/irqchip/irq-csky-apb-intc.c
index 2543baba8b1f..5a2ec43b7ddd 100644
--- a/drivers/irqchip/irq-csky-apb-intc.c
+++ b/drivers/irqchip/irq-csky-apb-intc.c
@@ -95,7 +95,7 @@ static inline void setup_irq_channel(u32 magic, void __iomem *reg_addr)
 
 	/* Setup 64 channel slots */
 	for (i = 0; i < INTC_IRQS; i += 4)
-		writel_relaxed(build_channel_val(i, magic), reg_addr + i);
+		writel(build_channel_val(i, magic), reg_addr + i);
 }
 
 static int __init
@@ -135,16 +135,10 @@ ck_intc_init_comm(struct device_node *node, struct device_node *parent)
 static inline bool handle_irq_perbit(struct pt_regs *regs, u32 hwirq,
 				     u32 irq_base)
 {
-	u32 irq;
-
 	if (hwirq == 0)
 		return 0;
 
-	while (hwirq) {
-		irq = __ffs(hwirq);
-		hwirq &= ~BIT(irq);
-		handle_domain_irq(root_domain, irq_base + irq, regs);
-	}
+	handle_domain_irq(root_domain, irq_base + __fls(hwirq), regs);
 
 	return 1;
 }
@@ -154,12 +148,16 @@ static void gx_irq_handler(struct pt_regs *regs)
 {
 	bool ret;
 
-	do {
-		ret  = handle_irq_perbit(regs,
-				readl_relaxed(reg_base + GX_INTC_PEN31_00), 0);
-		ret |= handle_irq_perbit(regs,
-				readl_relaxed(reg_base + GX_INTC_PEN63_32), 32);
-	} while (ret);
+retry:
+	ret = handle_irq_perbit(regs,
+			readl(reg_base + GX_INTC_PEN63_32), 32);
+	if (ret)
+		goto retry;
+
+	ret = handle_irq_perbit(regs,
+			readl(reg_base + GX_INTC_PEN31_00), 0);
+	if (ret)
+		goto retry;
 }
 
 static int __init
@@ -174,14 +172,14 @@ gx_intc_init(struct device_node *node, struct device_node *parent)
 	/*
 	 * Initial enable reg to disable all interrupts
 	 */
-	writel_relaxed(0x0, reg_base + GX_INTC_NEN31_00);
-	writel_relaxed(0x0, reg_base + GX_INTC_NEN63_32);
+	writel(0x0, reg_base + GX_INTC_NEN31_00);
+	writel(0x0, reg_base + GX_INTC_NEN63_32);
 
 	/*
 	 * Initial mask reg with all unmasked, because we only use enalbe reg
 	 */
-	writel_relaxed(0x0, reg_base + GX_INTC_NMASK31_00);
-	writel_relaxed(0x0, reg_base + GX_INTC_NMASK63_32);
+	writel(0x0, reg_base + GX_INTC_NMASK31_00);
+	writel(0x0, reg_base + GX_INTC_NMASK63_32);
 
 	setup_irq_channel(0x03020100, reg_base + GX_INTC_SOURCE);
 
@@ -204,20 +202,29 @@ static void ck_irq_handler(struct pt_regs *regs)
 	void __iomem *reg_pen_lo = reg_base + CK_INTC_PEN31_00;
 	void __iomem *reg_pen_hi = reg_base + CK_INTC_PEN63_32;
 
-	do {
-		/* handle 0 - 31 irqs */
-		ret  = handle_irq_perbit(regs, readl_relaxed(reg_pen_lo), 0);
-		ret |= handle_irq_perbit(regs, readl_relaxed(reg_pen_hi), 32);
+retry:
+	/* handle 0 - 63 irqs */
+	ret = handle_irq_perbit(regs, readl(reg_pen_hi), 32);
+	if (ret)
+		goto retry;
 
-		if (nr_irq == INTC_IRQS)
-			continue;
+	ret = handle_irq_perbit(regs, readl(reg_pen_lo), 0);
+	if (ret)
+		goto retry;
 
-		/* handle 64 - 127 irqs */
-		ret |= handle_irq_perbit(regs,
-			readl_relaxed(reg_pen_lo + CK_INTC_DUAL_BASE), 64);
-		ret |= handle_irq_perbit(regs,
-			readl_relaxed(reg_pen_hi + CK_INTC_DUAL_BASE), 96);
-	} while (ret);
+	if (nr_irq == INTC_IRQS)
+		return;
+
+	/* handle 64 - 127 irqs */
+	ret = handle_irq_perbit(regs,
+			readl(reg_pen_hi + CK_INTC_DUAL_BASE), 96);
+	if (ret)
+		goto retry;
+
+	ret = handle_irq_perbit(regs,
+			readl(reg_pen_lo + CK_INTC_DUAL_BASE), 64);
+	if (ret)
+		goto retry;
 }
 
 static int __init
@@ -230,11 +237,11 @@ ck_intc_init(struct device_node *node, struct device_node *parent)
 		return ret;
 
 	/* Initial enable reg to disable all interrupts */
-	writel_relaxed(0, reg_base + CK_INTC_NEN31_00);
-	writel_relaxed(0, reg_base + CK_INTC_NEN63_32);
+	writel(0, reg_base + CK_INTC_NEN31_00);
+	writel(0, reg_base + CK_INTC_NEN63_32);
 
 	/* Enable irq intc */
-	writel_relaxed(BIT(31), reg_base + CK_INTC_ICR);
+	writel(BIT(31), reg_base + CK_INTC_ICR);
 
 	ck_set_gc(node, reg_base, CK_INTC_NEN31_00, 0);
 	ck_set_gc(node, reg_base, CK_INTC_NEN63_32, 32);
@@ -260,8 +267,8 @@ ck_dual_intc_init(struct device_node *node, struct device_node *parent)
 		return ret;
 
 	/* Initial enable reg to disable all interrupts */
-	writel_relaxed(0, reg_base + CK_INTC_NEN31_00 + CK_INTC_DUAL_BASE);
-	writel_relaxed(0, reg_base + CK_INTC_NEN63_32 + CK_INTC_DUAL_BASE);
+	writel(0, reg_base + CK_INTC_NEN31_00 + CK_INTC_DUAL_BASE);
+	writel(0, reg_base + CK_INTC_NEN63_32 + CK_INTC_DUAL_BASE);
 
 	ck_set_gc(node, reg_base + CK_INTC_DUAL_BASE, CK_INTC_NEN31_00, 64);
 	ck_set_gc(node, reg_base + CK_INTC_DUAL_BASE, CK_INTC_NEN63_32, 96);