linux/arch/tile, branch v4.5

dma-mapping: always provide the dma_map_ops based implementation

2016-01-21T01:09:18Z

Move the generic implementation to now that all architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now that everyone supports them. [valentinrothberg@gmail.com: remove leftovers in Kconfig] Signed-off-by: Christoph Hellwig Cc: "David S. Miller" Cc: Aurelien Jacquiot Cc: Chris Metcalf Cc: David Howells Cc: Geert Uytterhoeven Cc: Haavard Skinnemoen Cc: Hans-Christian Egtvedt Cc: Helge Deller Cc: James Hogan Cc: Jesper Nilsson Cc: Koichi Yasutake Cc: Ley Foon Tan Cc: Mark Salter Cc: Mikael Starvik Cc: Steven Miao Cc: Vineet Gupta Cc: Christian Borntraeger Cc: Joerg Roedel Cc: Sebastian Ott Signed-off-by: Valentin Rothberg Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tile: uninline dma_set_mask

2016-01-21T01:09:18Z

We'll soon merge into and the reference to dma_capable in the tile dma_set_mask would create a circular dependency. Fix this by moving the implementation out of line. Signed-off-by: Christoph Hellwig Cc: Chris Metcalf Cc: Christian Borntraeger Cc: Joerg Roedel Cc: Sebastian Ott Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2016-01-19T00:44:24Z

Pull virtio barrier rework+fixes from Michael Tsirkin: "This adds a new kind of barrier, and reworks virtio and xen to use it. Plus some fixes here and there" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (44 commits) checkpatch: add virt barriers checkpatch: check for __smp outside barrier.h checkpatch.pl: add missing memory barriers virtio: make find_vqs() checkpatch.pl-friendly virtio_balloon: fix race between migration and ballooning virtio_balloon: fix race by fill and leak s390: more efficient smp barriers s390: use generic memory barriers xen/events: use virt_xxx barriers xen/io: use virt_xxx barriers xenbus: use virt_xxx barriers virtio_ring: use virt_store_mb sh: move xchg_cmpxchg to a header by itself sh: support 1 and 2 byte xchg virtio_ring: update weak barriers to use virt_xxx Revert "virtio_ring: Update weak barriers to use dma_wmb/rmb" asm-generic: implement virt_xxx memory barriers x86: define __smp_xxx xtensa: define __smp_xxx tile: define __smp_xxx ...

Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

2016-01-18T20:57:18Z

Pull arch/tile updates from Chris Metcalf: "This is a grab bag of changes that includes some NOHZ and context-tracking related changes, some debugging improvements, JUMP_LABEL support, and some fixes for tilepro allmodconfig support. We also remove the now-unused node_has_online_mem() definitions both for tile's asm/topology.h as well as in linux/topology.h itself" * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: numa: remove stale node_has_online_mem() define arch/tile: move user_exit() to early kernel entry sequence tile: fix bug in setting PT_FLAGS_DISABLE_IRQ on kernel entry tile: fix tilepro casts for readl, writel, etc tile: fix a -Wframe-larger-than warning tile: include the syscall number in the backtrace MAINTAINERS: add git URL for tile arch/tile: adopt prepare_exit_to_usermode() model from x86 tile/jump_label: add jump label support for TILE-Gx tile: define a macro ktext_writable_addr to get writable kernel text address

numa: remove stale node_has_online_mem() define

2016-01-18T19:49:33Z

This isn't used anywhere, so delete it. Looks like the last usage (in x86-specific code) was removed by Tejun in 2011 in commit bd6709a91a59 ("x86, NUMA: Make 32bit use common NUMA init path"). Signed-off-by: Chris Metcalf

arch/tile: move user_exit() to early kernel entry sequence

2016-01-18T19:49:30Z

This ensures that we always notify context tracking that we have exited from user space no matter how we enter the kernel. It is similar to how arm64 handles context tracking, for example. This allows the removal of all the exception_enter() calls that were added in commit 49e4e15619cd ("tile: support CONTEXT_TRACKING and thus NOHZ_FULL"). Signed-off-by: Chris Metcalf

tile: fix bug in setting PT_FLAGS_DISABLE_IRQ on kernel entry

2016-01-18T19:49:26Z

This flag value is saved in ptregs and used to decide whether to disable irqs when returning from the kernel. Commit 1168df528fe4 ("tile: don't assume user privilege is zero") performed a bad merge from some KVM-enabled code that had not yet been upstreamed. The only issue with the old code is that we will read the interrupt mask in more conditions than we need to (e.g., coming from user space when user space has the Interrupt Critical Section bit set, or coming from a guest kernel), which is a slow multi-cycle operation. This change saves those few cycles in the common case. Signed-off-by: Chris Metcalf

tile: fix tilepro casts for readl, writel, etc

2016-01-18T19:49:23Z

Missing parentheses could cause an argument of the form "integer + pointer" to get cast to "(long)integer + pointer" and remain a pointer type, causing compiler warnings. Signed-off-by: Chris Metcalf

tile: fix a -Wframe-larger-than warning

2016-01-18T19:49:19Z

The warning occurs in setup.c, where it is known that it can't be a problem, but it's still a good idea to silence the warning. The onstack array is converted from an s32 to a u8, which still is plenty of range for the values being managed there. Signed-off-by: Chris Metcalf

tile: include the syscall number in the backtrace

2016-01-18T19:49:16Z

This information is easily available in the backtrace data and can be helpful when trying to figure out the backtrace, particularly if we're early in kernel entry or late in kernel exit. Signed-off-by: Chris Metcalf