kernel.git/arch/openrisc/kernel/process.c, branch linux-5.8.y

mm: don't include asm/pgtable.h if linux/mm.h is already included

2020-06-09T16:39:13Z

Patch series "mm: consolidate definitions of page table accessors", v2. The low level page table accessors (pXY_index(), pXY_offset()) are duplicated across all architectures and sometimes more than once. For instance, we have 31 definition of pgd_offset() for 25 supported architectures. Most of these definitions are actually identical and typically it boils down to, e.g. static inline unsigned long pmd_index(unsigned long address) { return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); } static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) { return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); } These definitions can be shared among 90% of the arches provided XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined. For architectures that really need a custom version there is always possibility to override the generic version with the usual ifdefs magic. These patches introduce include/linux/pgtable.h that replaces include/asm-generic/pgtable.h and add the definitions of the page table accessors to the new header. This patch (of 12): The linux/mm.h header includes to allow inlining of the functions involving page table manipulations, e.g. pte_alloc() and pmd_alloc(). So, there is no point to explicitly include in the files that include . The include statements in such cases are remove with a simple loop: for f in $(git grep -l "include ") ; do sed -i -e '/include / d' $f done Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Cain Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ley Foon Tan Cc: Mark Salter Cc: Matthew Wilcox Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Mike Rapoport Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Tony Luck Cc: Vincent Chen Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org Signed-off-by: Linus Torvalds

openrisc: Cleanup copy_thread_tls docs and comments

2020-03-02T09:10:52Z

Previously copy_thread_tls was copy_thread and before that something else. Remove the documentation about the regs parameter that didn't exist in either version. Next, fix comment wrapping and details about how TLS pointer gets to the copy_thread_tls function. Signed-off-by: Stafford Horne Acked-by: Christian Brauner

openrisc: Convert copy_thread to copy_thread_tls

2020-03-02T09:10:45Z

This is required for clone3 which passes the TLS value through a struct rather than a register. Signed-off-by: Stafford Horne Acked-by: Christian Brauner

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

Merge tag 'openrisc-for-linus' of git://github.com/openrisc/linux

2017-07-07T20:58:49Z

Pull OpenRISC updates from Stafford Horne: "Openrisc fixes for this 4.13 merge window, there is not really much here: - include cleanups, one with should reduce build time slightly - switch to new toolchain to new (>2 year old) toolchain prefix" * tag 'openrisc-for-linus' of git://github.com/openrisc/linux: openrisc: defconfig: Cleanup from old Kconfig options openrisc: explicitly include linux/bug.h in asm/fixmap.h openrisc: Switch to use export.h instead of module.h openrisc: Change toolchain from or32- to or1k-

arch: remove unused macro/function thread_saved_pc()

2017-06-28T23:13:57Z

The only user of thread_saved_pc() in non-arch-specific code was removed in commit 8243d5597793 ("sched/core: Remove pointless printout in sched_show_task()"). Remove the implementations as well. Some architectures use thread_saved_pc() in their arch-specific code. Leave their thread_saved_pc() intact. Signed-off-by: Tobias Klauser Acked-by: Geert Uytterhoeven Cc: Ingo Molnar Signed-off-by: Linus Torvalds

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

2017-05-29T16:40:54Z

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

openrisc: Switch to use export.h instead of module.h

2017-05-15T13:02:33Z

Reduce dependencies on module.h since all we need here is export.h for EXPORT_SYMBOL. Fixes: f50169324df4 ("module.h: split out the EXPORT_SYMBOL into export.h") Signed-off-by: Stafford Horne

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

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