The variable "high_memory" is higmem_start. If the pfn is in highmem
then the return value of pfn_valid() will be false, but we expect true.

This will cause problem in __update_cache():

	pfn = pte_pfn(pte);
	if (unlikely(!pfn_valid(pfn)))
		return;

It will directly return without flush_cache.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

fix If ccr2 is not set, all won't be set.

Change-Id: Ia77e30d56a2026b6ab20d583f579c6476f5c7a78
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

iperf -c 172.16.150.8 -p 12345 -i 1

Change-Id: Ic00d33ec16bc0e9d4c4f9478f186e875f652a2ab
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I6a83c4206e8a8e4e7e80b5ea1445ab1e69b9e16d
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

gfp |=  __GFP_NORETRY
gfp &= ~__GFP_HIGHMEM

Change-Id: I51ae9d2c915efd9503f7b51570cda171f6dde47b
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

ref: gcc/config/csky/abiv1_constraints.md

(define_register_constraint "b" "RWCPCR_REGS" "R0 - R7")

Change-Id: I5e8beb045b26fe8c3c9b8a75f4953f1ebcfa2a0f
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I83b89352900c8e7a850aac57b67546a86e7064ea
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: Iecf1508b839b3657e473dd01894060986ea7d433
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: Iddf0c6cbf433759356c2dcf75b310c8ab0ae9c2e
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: If347ddf4d84b3bc50ada4a728858836367344a3c
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

If the output part need be modified in asm, you must use & (eg:"=&r").

Change-Id: Ia15ec66371e018ccac6103d5481c177321bc5c1d
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: If05f392fc314a305526934c68324ae3049813b52
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: Ia908660971fe417a73e77e5d71e7f2f0902b5f2e
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: Ibfa2bdf8b6a9a814c9e059391aab83b34eae0fe3
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Thx Ling Jiangjie <lingjj@natonalchip.com>

Change-Id: Ib1c5a40a85cbae957ab101089ba6c9445aab20cc
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I8004a7056de724e73e8ef1c749efec72737d7373
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I890c4c1107ea6fe2c51c6049033b6ed8236e100a
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

This bug is come from binutils/gas/config/tc-csky.c:
is_imm_over_orange() failed. Gas couldn't recognize the bt is 16/32
opcode, and it cause error when parse '2b - 1b'.

Change-Id: I01a13b910954c57cc856c7f17f32d72c3d6e4cfe
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I8ce0d372fbf373819c0ab25770734004db74dbd2
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: Ibccac9efe955f51b728adf5e0fbcd75fe39e7e29
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I3fc987702348023a86802f8327304179797e1a2f
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I3ecac65ed1219dd577c21ed7044c5db7506e13e2
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

When we use tlb_miss, we needn't flush cache in tlb_end_vma.

Change-Id: I83db2669b77e7616cc62ae44cfd5678119bb1355
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

This is a serious bug, and it's found by nationalchip in their
product. It made gx3211 soc jpeg decoder working error
because the data is wrong when copy2user from usb disk.

Change-Id: Idd96d99ec0303e5c266926afda5aada50258d414
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I5e4ba0dba9c78f555005bc9d8faac878143acafc
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

We use mt7601u as module in default, because it need firmware in rootfs.

Change-Id: I39ac52ded278c1718c4f46e517faa3a40c068934
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I70c18c79bd809fb6e7637f1a86f80f0180af832a
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I71db4a942ae6fc0a62c15782933313cd7877b784
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: Icfff8f2410ad76ec4514fd82fe2ee9db917a7eba
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I63c6c56d317af70471cbcd72c6b215c9dbd2e98d
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: Ib12126351e5e84e4738ec7ea14b544d298e72155
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

The debug info of prink will cause the lmbench result slow.

Change-Id: I9111479af9091811a681d0299a38821edf9a92f6
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I539446c50826380d570964e9a868bd84cb40932b
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

When flush_dcache_page is called, we needn't alaways flush the dcache.
Instead, we could set page->flag and flush them in update_mmu_cache().

Change-Id: Iff84cef54a6fd80594247836f74d310d66522527
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: I6476f6ce759b8b164eded62a0741c314542af02b
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Change-Id: Id06bcaabe515d1742798302397ac601bb7da8960
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Some platform need to use gpio irq, and NR_IRQS should be defined in a
flexiable way.

Change-Id: Ie87b944a64bd169cfb640e8bb829926f3fe989da
Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

Signed-off-by: Guo Ren <ren_guo@c-sky.com>

videobuf2-dma-contig.c use dma_alloc get uncached direct-addr, and use
it to mmap for user-space.

The mmap use __pa(x) couldn't convert uncached direct-addr to phy-addr.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>