kernel.git/arch/openrisc, branch linux-4.11.y

kthread: fix boot hang (regression) on MIPS/OpenRISC

2017-06-14T13:07:51Z

commit b0f5a8f32e8bbdaae1abb8abe2d3cbafaba57e08 upstream. This fixes a regression in commit 4d6501dce079 where I didn't notice that MIPS and OpenRISC were reinitialising p->{set,clear}_child_tid to NULL after our initialisation in copy_process(). We can simply get rid of the arch-specific initialisation here since it is now always done in copy_process() before hitting copy_thread{,_tls}(). Review notes: - As far as I can tell, copy_process() is the only user of copy_thread_tls(), which is the only caller of copy_thread() for architectures that don't implement copy_thread_tls(). - After this patch, there is no arch-specific code touching p->set_child_tid or p->clear_child_tid whatsoever. - It may look like MIPS/OpenRISC wanted to always have these fields be NULL, but that's not true, as copy_process() would unconditionally set them again _after_ calling copy_thread_tls() before commit 4d6501dce079. Fixes: 4d6501dce079c1eb6bf0b1d8f528a5e81770109e ("kthread: Fix use-after-free if kthread fork fails") Reported-by: Guenter Roeck Tested-by: Guenter Roeck # MIPS only Acked-by: Stafford Horne Acked-by: Oleg Nesterov Cc: Ralf Baechle Cc: linux-mips@linux-mips.org Cc: Jonas Bonn Cc: Stefan Kristiansson Cc: openrisc@lists.librecores.org Cc: Jamie Iles Cc: Thomas Gleixner Signed-off-by: Vegard Nossum Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman

openrisc: Export symbols needed by modules

2017-03-15T15:12:57Z

This was detected by allmodconfig, errors reported: ERROR: "empty_zero_page" [net/ceph/libceph.ko] undefined! ERROR: "__ucmpdi2" [lib/842/842_decompress.ko] undefined! ERROR: "empty_zero_page" [fs/nfs/objlayout/objlayoutdriver.ko] undefined! ERROR: "empty_zero_page" [fs/exofs/exofs.ko] undefined! ERROR: "empty_zero_page" [fs/crypto/fscrypto.ko] undefined! ERROR: "__ucmpdi2" [fs/btrfs/btrfs.ko] undefined! ERROR: "pm_power_off" [drivers/regulator/act8865-regulator.ko] undefined! ERROR: "__ucmpdi2" [drivers/media/i2c/adv7842.ko] undefined! ERROR: "__clear_user" [drivers/md/dm-mod.ko] undefined! ERROR: "__clear_user" [net/netfilter/x_tables.ko] undefined! Signed-off-by: Stafford Horne

openrisc: fix issue handling 8 byte get_user calls

2017-03-15T15:12:56Z

Was getting the following error with allmodconfig: ERROR: "__get_user_bad" [lib/test_user_copy.ko] undefined! This was simply a missing break statement, causing an unwanted fall through. Signed-off-by: Stafford Horne

openrisc: xchg: fix `computed is not used` warning

2017-03-15T15:12:56Z

When building allmodconfig this warning shows. fs/ocfs2/file.c: In function 'ocfs2_file_write_iter': ./arch/openrisc/include/asm/cmpxchg.h:81:3: warning: value computed is not used [-Wunused-value] ((typeof(*(ptr)))__xchg((unsigned long)(with), (ptr), sizeof(*(ptr)))) ^ Applying the same patch logic that was done to the cmpxchg macro. Signed-off-by: Stafford Horne

arch, mm: convert all architectures to use 5level-fixup.h

2017-03-09T19:48:47Z

If an architecture uses 4level-fixup.h we don't need to do anything as it includes 5level-fixup.h. If an architecture uses pgtable-nop*d.h, define __ARCH_USE_5LEVEL_HACK before inclusion of the header. It makes asm-generic code to use 5level-fixup.h. If an architecture has 4-level paging or folds levels on its own, include 5level-fixup.h directly. Signed-off-by: Kirill A. Shutemov Acked-by: Michal Hocko Signed-off-by: Linus Torvalds

sched/headers: Prepare to move kstack_end() from to

2017-03-02T07:42:39Z

But first update the usage sites with the new header dependency. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:36Z

We are going to split out of , which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder file that just maps to to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:35Z

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:34Z

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:29Z