[GIT PULL] ARC changes for 4.12-rc1
Hi Linus, ARC updates for 4.12. Please pull ! Thx, -Vineet > The following changes since commit 3d5e80125a6e5649c6bdad8d5780e39ea422c67d: ARCv2: entry: save Accumulator register pair (r58:59) if present (2017-04-20 15:37:49 -0700) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc.git/ tags/arc-4.12-rc1 for you to fetch changes up to cf4100d1cddcd243f80ac2af2e4c4273919ff225: Revert "ARCv2: Allow enabling PAE40 w/o HIGHMEM" (2017-05-05 13:49:41 -0700) ARC updates for 4.12 - AXS10x platform clk updates for I2S, PGU - Adding region based cache flush operation for ARCv2 cores - Enforcing PAE40 dependency on HIGHMEM - ptrace support for additional regs in ARCv2 cores - Fix build failure in linux-next dut to a header include ordering change Alexey Brodkin (1): Revert "ARCv2: Allow enabling PAE40 w/o HIGHMEM" Jose Abreu (2): arc: axs10x: Add DT bindings for I2S audio playback arc: axs10x: Fix ARC PGU default clock frequency Vineet Gupta (7): ARC: mm: Move full_page computation into cache version agnostic wrapper ARCv2: mm: Implement cache region flush operations ARCv2: mm: Merge 2 updates to DC_CTRL for region flush ARCv2: mm: micro-optimize region flush generated code elf: Add ARCv2 specific core note section ARCv2: ptrace: provide regset for accumulator/r30 regs ARC: mm: fix build failure in linux-next for UP builds arch/arc/Kconfig | 1 + arch/arc/boot/dts/axs10x_mb.dtsi | 24 ++-- arch/arc/include/asm/cache.h | 6 ++ arch/arc/include/asm/mmu.h | 4 ++ arch/arc/include/asm/pgtable.h | 6 +- arch/arc/include/uapi/asm/elf.h| 1 + arch/arc/include/uapi/asm/ptrace.h | 5 ++ arch/arc/kernel/ptrace.c | 62 - arch/arc/mm/cache.c| 111 - include/uapi/linux/elf.h | 2 +- 10 files changed, 197 insertions(+), 25 deletions(-) ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
kisskb: OK linus/axs101_defconfig/arcompact Wed May 10, 06:52
OK linus/axs101_defconfig/arcompact Wed May 10, 06:52 http://kisskb.ellerman.id.au/kisskb/buildresult/13027160/ Commit: Merge tag 'arc-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc 4a1e31c68e9f40be32838944931178b0d9ed9162 Compiler: arc-buildroot-linux-uclibc-gcc (Buildroot 2015.08.1) 4.8.4 No errors found in log Possible warnings (16) -- kernel/sched/core.c:3326:1: warning: control reaches end of non-void function [-Wreturn-type] include/linux/kernel.h:757:16: warning: comparison of distinct pointer types lacks a cast [enabled by default] block/cfq-iosched.c:3823:1: warning: control reaches end of non-void function [-Wreturn-type] net/core/ethtool.c:314:1: warning: control reaches end of non-void function [-Wreturn-type] fs/ext4/ext4_jbd2.h:430:1: warning: control reaches end of non-void function [-Wreturn-type] fs/ext4/ext4_jbd2.h:430:1: warning: control reaches end of non-void function [-Wreturn-type] include/linux/sunrpc/svc_xprt.h:179:1: warning: control reaches end of non-void function [-Wreturn-type] fs/ext4/ext4_jbd2.h:430:1: warning: control reaches end of non-void function [-Wreturn-type] net/ipv4/tcp_input.c:4252:49: warning: array subscript is above array bounds [-Warray-bounds] fs/ext4/ext4_jbd2.h:430:1: warning: control reaches end of non-void function [-Wreturn-type] fs/ext4/ext4_jbd2.h:430:1: warning: control reaches end of non-void function [-Wreturn-type] drivers/scsi/sd.c:1251:1: warning: control reaches end of non-void function [-Wreturn-type] fs/ext4/ext4_jbd2.h:430:1: warning: control reaches end of non-void function [-Wreturn-type] fs/ext4/ext4_jbd2.h:430:1: warning: control reaches end of non-void function [-Wreturn-type] fs/ext4/ext4_jbd2.h:430:1: warning: control reaches end of non-void function [-Wreturn-type] fs/ext4/ext4_jbd2.h:430:1: warning: control reaches end of non-void function [-Wreturn-type] ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
Re: [PATCH] Allow to use DMA_CTRL_REUSE flag for all channel types
On Tue, May 02, 2017 at 03:16:18PM +, Eugeniy Paltsev wrote: > Hi Vinod, > > On Mon, 2017-05-01 at 11:21 +0530, Vinod Koul wrote: > > On Fri, Apr 28, 2017 at 04:37:46PM +0300, Eugeniy Paltsev wrote: > > > In the current implementation dma_get_slave_caps is used to check > > > state of descriptor_reuse option. But dma_get_slave_caps includes > > > check if the channel supports slave transactions. > > > So DMA_CTRL_REUSE flag can be set (even for MEM-TO-MEM tranfers) > > > only if channel supports slave transactions. > > > > > > Now we can use DMA_CTRL_REUSE flag for all channel types. > > > Also it allows to test reusing mechanism with simply mem-to-mem dma > > > test. > > > > We do not want to allow that actually. Slave is always treated as a > > special > > case, so resue was allowed. > > > > With memcpy the assumptions are different and clients can do reuse. > > Could you please clarify why don't we want to allow use DMA_CTRL_REUSE > for mem-to-mem transfers? > > Reusing of mem-to-mem (MEMCPY and DMA_SG) descriptors will work fine on > virt-dma based drivers. Precisely, the client does not know if you have a virt-dma or some other kind if implementation For them they see a channel and use it! > Anyway the current implementation behaviour is quite strange: > If channel supports *slave* transfers DMA_CTRL_REUSE can be set to > slave and *mem-to-mem* transfers. > > And, of course, we can pass DMA_CTRL_REUSE flag to device_prep_dma_sg > or device_prep_dma_memcpy directly without checks. Yeah thats bad, do send a patch to forbid that.. -- ~Vinod ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
