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* VFS: assorted weird filesystems: d_inode() annotationsDavid Howells2015-04-15
| | | | | Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge tag 'powerpc-3.19-1' of ↵Linus Torvalds2014-12-11
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull powerpc updates from Michael Ellerman: "Some nice cleanups like removing bootmem, and removal of __get_cpu_var(). There is one patch to mm/gup.c. This is the generic GUP implementation, but is only used by us and arm(64). We have an ack from Steve Capper, and although we didn't get an ack from Andrew he told us to take the patch through the powerpc tree. There's one cxl patch. This is in drivers/misc, but Greg said he was happy for us to manage fixes for it. There is an infrastructure patch to support an IPMI driver for OPAL. There is also an RTC driver for OPAL. We weren't able to get any response from the RTC maintainer, Alessandro Zummo, so in the end we just merged the driver. The usual batch of Freescale updates from Scott" * tag 'powerpc-3.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (101 commits) powerpc/powernv: Return to cpu offline loop when finished in KVM guest powerpc/book3s: Fix partial invalidation of TLBs in MCE code. powerpc/mm: don't do tlbie for updatepp request with NO HPTE fault powerpc/xmon: Cleanup the breakpoint flags powerpc/xmon: Enable HW instruction breakpoint on POWER8 powerpc/mm/thp: Use tlbiel if possible powerpc/mm/thp: Remove code duplication powerpc/mm/hugetlb: Sanity check gigantic hugepage count powerpc/oprofile: Disable pagefaults during user stack read powerpc/mm: Check for matching hpte without taking hpte lock powerpc: Drop useless warning in eeh_init() powerpc/powernv: Cleanup unused MCE definitions/declarations. powerpc/eeh: Dump PHB diag-data early powerpc/eeh: Recover EEH error on ownership change for BCM5719 powerpc/eeh: Set EEH_PE_RESET on PE reset powerpc/eeh: Refactor eeh_reset_pe() powerpc: Remove more traces of bootmem powerpc/pseries: Initialise nvram_pstore_info's buf_lock cxl: Name interrupts in /proc/interrupt cxl: Return error to PSL if IRQ demultiplexing fails & print clearer warning ...
| * powerpc/mm: don't do tlbie for updatepp request with NO HPTE faultAneesh Kumar K.V2014-12-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | upatepp can get called for a nohpte fault when we find from the linux page table that the translation was hashed before. In that case we are sure that there is no existing translation, hence we could avoid doing tlbie. We could possibly race with a parallel fault filling the TLB. But that should be ok because updatepp is only ever relaxing permissions. We also look at linux pte permission bits when filling hash pte permission bits. We also hold the linux pte busy bits while inserting/updating a hashpte entry, hence a paralle update of linux pte is not possible. On the other hand mprotect involves ptep_modify_prot_start which cause a hpte invalidate and not updatepp. Performance number: We use randbox_access_bench written by Anton. Kernel with THP disabled and smaller hash page table size. 86.60% random_access_b [kernel.kallsyms] [k] .native_hpte_updatepp 2.10% random_access_b random_access_bench [.] doit 1.99% random_access_b [kernel.kallsyms] [k] .do_raw_spin_lock 1.85% random_access_b [kernel.kallsyms] [k] .native_hpte_insert 1.26% random_access_b [kernel.kallsyms] [k] .native_flush_hash_range 1.18% random_access_b [kernel.kallsyms] [k] .__delay 0.69% random_access_b [kernel.kallsyms] [k] .native_hpte_remove 0.37% random_access_b [kernel.kallsyms] [k] .clear_user_page 0.34% random_access_b [kernel.kallsyms] [k] .__hash_page_64K 0.32% random_access_b [kernel.kallsyms] [k] fast_exception_return 0.30% random_access_b [kernel.kallsyms] [k] .hash_page_mm With Fix: 27.54% random_access_b random_access_bench [.] doit 22.90% random_access_b [kernel.kallsyms] [k] .native_hpte_insert 5.76% random_access_b [kernel.kallsyms] [k] .native_hpte_remove 5.20% random_access_b [kernel.kallsyms] [k] fast_exception_return 5.12% random_access_b [kernel.kallsyms] [k] .__hash_page_64K 4.80% random_access_b [kernel.kallsyms] [k] .hash_page_mm 3.31% random_access_b [kernel.kallsyms] [k] data_access_common 1.84% random_access_b [kernel.kallsyms] [k] .trace_hardirqs_on_caller Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* | Merge branch 'akpm' (patchbomb from Andrew)Linus Torvalds2014-12-10
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge first patchbomb from Andrew Morton: - a few minor cifs fixes - dma-debug upadtes - ocfs2 - slab - about half of MM - procfs - kernel/exit.c - panic.c tweaks - printk upates - lib/ updates - checkpatch updates - fs/binfmt updates - the drivers/rtc tree - nilfs - kmod fixes - more kernel/exit.c - various other misc tweaks and fixes * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (190 commits) exit: pidns: fix/update the comments in zap_pid_ns_processes() exit: pidns: alloc_pid() leaks pid_namespace if child_reaper is exiting exit: exit_notify: re-use "dead" list to autoreap current exit: reparent: call forget_original_parent() under tasklist_lock exit: reparent: avoid find_new_reaper() if no children exit: reparent: introduce find_alive_thread() exit: reparent: introduce find_child_reaper() exit: reparent: document the ->has_child_subreaper checks exit: reparent: s/while_each_thread/for_each_thread/ in find_new_reaper() exit: reparent: fix the cross-namespace PR_SET_CHILD_SUBREAPER reparenting exit: reparent: fix the dead-parent PR_SET_CHILD_SUBREAPER reparenting exit: proc: don't try to flush /proc/tgid/task/tgid exit: release_task: fix the comment about group leader accounting exit: wait: drop tasklist_lock before psig->c* accounting exit: wait: don't use zombie->real_parent exit: wait: cleanup the ptrace_reparented() checks usermodehelper: kill the kmod_thread_locker logic usermodehelper: don't use CLONE_VFORK for ____call_usermodehelper() fs/hfs/catalog.c: fix comparison bug in hfs_cat_keycmp nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races ...
| * | ppc/cell: replace get_unused_fd() with get_unused_fd_flags(0)Yann Droneaud2014-12-10
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | This patch replaces calls to get_unused_fd() with equivalent call to get_unused_fd_flags(0) to preserve current behavor for existing code. In a further patch, get_unused_fd() will be removed so that new code start using get_unused_fd_flags(), with the hope O_CLOEXEC could be used, either by default or choosen by userspace. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* / move d_rcu from overlapping d_child to overlapping d_aliasAl Viro2014-11-03
|/ | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* powerpc/cell: Move spu_handle_mm_fault() out of cell platformIan Munsie2014-10-08
| | | | | | | | | | | | | Currently spu_handle_mm_fault() is in the cell platform. This code is generically useful for other non-cell co-processors on powerpc. This patch moves this function out of the cell platform into arch/powerpc/mm so that others may use it. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: cell: Use ktime_get_ns()Thomas Gleixner2014-07-23
| | | | | | | | | | | | Replace the ever recurring: ts = ktime_get_ts(); ns = timespec_to_ns(&ts); with ns = ktime_get_ns(); Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
* powerpc/cell: Fix compilation with CONFIG_COREDUMP=nMichael Ellerman2014-07-10
| | | | | | | | | | | | | | | | | | Commit 046d662f4818 "coredump: make core dump functionality optional" made the coredump optional, but didn't update the spufs code that depends on it. That leads to build errors such as: arch/powerpc/platforms/built-in.o: In function `.spufs_arch_write_note': coredump.c:(.text+0x22cd4): undefined reference to `.dump_emit' coredump.c:(.text+0x22cf4): undefined reference to `.dump_emit' coredump.c:(.text+0x22d0c): undefined reference to `.dump_align' coredump.c:(.text+0x22d48): undefined reference to `.dump_emit' coredump.c:(.text+0x22e7c): undefined reference to `.dump_skip' Fix it by adding some ifdefs in the cell code. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/spufs: Remove duplicate SPUFS_CNTL_MAP_SIZE defineDan Carpenter2014-06-11
| | | | | | | | | | The SPUFS_CNTL_MAP_SIZE define is cut and pasted twice so we can delete the second instance. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Jeremy Kerr <jk@ozlabs.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/spufs: Remove MAX_USER_PRIO defineJeremy Kerr2014-02-11
| | | | | | | | | | | | | | | | | | | Current ppc64_defconfig fails with: arch/powerpc/platforms/cell/spufs/sched.c:86:0: error: "MAX_USER_PRIO" redefined [-Werror] cc1: all warnings being treated as errors Commit 6b6350f155af ("sched: Expose some macros related to priority") introduced a generic MAX_USER_PRIO macro to sched/prio.h, which is causing the conflit. Use that one instead of our own. Reported-by: Fengguang Wu <fengguang.wu@intel.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Cc: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1392098717.689604.970589769393.1.gpush@pablo Signed-off-by: Ingo Molnar <mingo@kernel.org>
* new helper: dump_align()Al Viro2013-11-09
| | | | | | dump_skip to given alignment... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* spufs: get rid of dump_emit() wrappersAl Viro2013-11-09
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* switch elf_coredump_extra_notes_write() to dump_emit()Al Viro2013-11-09
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* powerpc/spufs: convert userns uid/gid mount options to kuid/kgidDwight Engen2013-08-21
| | | | | | | | | Acked-by: Jeremy Kerr <jk@ozlabs.org> Tested-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Dwight Engen <dwight.engen@oracle.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Ben Myers <bpm@sgi.com>
* [readdir] switch dcache_readdir() users to ->iterate()Al Viro2013-06-29
| | | | | | | new helpers - dir_emit_dot(file, ctx, dentry), dir_emit_dotdot(file, ctx), dir_emit_dots(file, ctx). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'next' of ↵Linus Torvalds2013-05-02
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc update from Benjamin Herrenschmidt: "The main highlights this time around are: - A pile of addition POWER8 bits and nits, such as updated performance counter support (Michael Ellerman), new branch history buffer support (Anshuman Khandual), base support for the new PCI host bridge when not using the hypervisor (Gavin Shan) and other random related bits and fixes from various contributors. - Some rework of our page table format by Aneesh Kumar which fixes a thing or two and paves the way for THP support. THP itself will not make it this time around however. - More Freescale updates, including Altivec support on the new e6500 cores, new PCI controller support, and a pile of new boards support and updates. - The usual batch of trivial cleanups & fixes" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (156 commits) powerpc: Fix build error for book3e powerpc: Context switch the new EBB SPRs powerpc: Turn on the EBB H/FSCR bits powerpc: Replace CPU_FTR_BCTAR with CPU_FTR_ARCH_207S powerpc: Setup BHRB instructions facility in HFSCR for POWER8 powerpc: Fix interrupt range check on debug exception powerpc: Update tlbie/tlbiel as per ISA doc powerpc: Print page size info during boot powerpc: print both base and actual page size on hash failure powerpc: Fix hpte_decode to use the correct decoding for page sizes powerpc: Decode the pte-lp-encoding bits correctly. powerpc: Use encode avpn where we need only avpn values powerpc: Reduce PTE table memory wastage powerpc: Move the pte free routines from common header powerpc: Reduce the PTE_INDEX_SIZE powerpc: Switch 16GB and 16MB explicit hugepages to a different page table format powerpc: New hugepage directory format powerpc: Don't truncate pgd_index wrongly powerpc: Don't hard code the size of pte page powerpc: Save DAR and DSISR in pt_regs on MCE ...
| * mm: remove free_area_cache use in powerpc architectureMichel Lespinasse2013-04-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As all other architectures have been converted to use vm_unmapped_area(), we are about to retire the free_area_cache. This change simply removes the use of that cache in slice_get_unmapped_area(), which will most certainly have a performance cost. Next one will convert that function to use the vm_unmapped_area() infrastructure and regain the performance. Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/spufs: Initialise inode->i_ino in spufs_new_inode()Michael Ellerman2013-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | In commit 85fe402 (fs: do not assign default i_ino in new_inode), the initialisation of i_ino was removed from new_inode() and pushed down into the callers. However spufs_new_inode() was not updated. This exhibits as no files appearing in /spu, because all our dirents have a zero inode, which readdir() seems to dislike. Cc: stable@vger.kernel.org Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | spufs: don't bother with fops->ownerAl Viro2013-04-09
|/ | | | | | | filesystem module as whole is pinned down by its superblock, no need to have opened files on it to add anything to that. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fs: Limit sys_mount to only request filesystem modules.Eric W. Biederman2013-03-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modify the request_module to prefix the file system type with "fs-" and add aliases to all of the filesystems that can be built as modules to match. A common practice is to build all of the kernel code and leave code that is not commonly needed as modules, with the result that many users are exposed to any bug anywhere in the kernel. Looking for filesystems with a fs- prefix limits the pool of possible modules that can be loaded by mount to just filesystems trivially making things safer with no real cost. Using aliases means user space can control the policy of which filesystem modules are auto-loaded by editing /etc/modprobe.d/*.conf with blacklist and alias directives. Allowing simple, safe, well understood work-arounds to known problematic software. This also addresses a rare but unfortunate problem where the filesystem name is not the same as it's module name and module auto-loading would not work. While writing this patch I saw a handful of such cases. The most significant being autofs that lives in the module autofs4. This is relevant to user namespaces because we can reach the request module in get_fs_type() without having any special permissions, and people get uncomfortable when a user specified string (in this case the filesystem type) goes all of the way to request_module. After having looked at this issue I don't think there is any particular reason to perform any filtering or permission checks beyond making it clear in the module request that we want a filesystem module. The common pattern in the kernel is to call request_module() without regards to the users permissions. In general all a filesystem module does once loaded is call register_filesystem() and go to sleep. Which means there is not much attack surface exposed by loading a filesytem module unless the filesystem is mounted. In a user namespace filesystems are not mounted unless .fs_flags = FS_USERNS_MOUNT, which most filesystems do not set today. Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Acked-by: Kees Cook <keescook@chromium.org> Reported-by: Kees Cook <keescook@google.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2013-02-26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs pile (part one) from Al Viro: "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent locking violations, etc. The most visible changes here are death of FS_REVAL_DOT (replaced with "has ->d_weak_revalidate()") and a new helper getting from struct file to inode. Some bits of preparation to xattr method interface changes. Misc patches by various people sent this cycle *and* ocfs2 fixes from several cycles ago that should've been upstream right then. PS: the next vfs pile will be xattr stuff." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits) saner proc_get_inode() calling conventions proc: avoid extra pde_put() in proc_fill_super() fs: change return values from -EACCES to -EPERM fs/exec.c: make bprm_mm_init() static ocfs2/dlm: use GFP_ATOMIC inside a spin_lock ocfs2: fix possible use-after-free with AIO ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero target: writev() on single-element vector is pointless export kernel_write(), convert open-coded instances fs: encode_fh: return FILEID_INVALID if invalid fid_type kill f_vfsmnt vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op nfsd: handle vfs_getattr errors in acl protocol switch vfs_getattr() to struct path default SET_PERSONALITY() in linux/elf.h ceph: prepopulate inodes only when request is aborted d_hash_and_lookup(): export, switch open-coded instances 9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate() 9p: split dropping the acls from v9fs_set_create_acl() ...
| * spufs_mkdir(): don't d_add() on negative parentAl Viro2013-02-22
| | | | | | | | | | | | | | NOTE: this really needs testing - I could've easily fucked up refcounting in there. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * new helper: file_inode(file)Al Viro2013-02-22
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | sched, powerpc: Fix sched.h split-up build failureIngo Molnar2013-02-11
|/ | | | | | | | | | | | | Fix PowerPC/Cell build fallout from: 8bd75c77b7c6 sched/rt: Move rt specific bits into new header file Reported-by: Michael Ellerman <michael@ellerman.id.au> Cc: Clark Williams <williams@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20130207094707.7b9f825f@riff.lan Signed-off-by: Ingo Molnar <mingo@kernel.org>
* vfs: turn is_dir argument to kern_path_create into a lookup_flags argJeff Layton2012-12-20
| | | | | | | | Where we can pass in LOOKUP_DIRECTORY or LOOKUP_REVAL. Any other flags passed in here are currently ignored. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* pidns: Use task_active_pid_ns where appropriateEric W. Biederman2012-11-19
| | | | | | | | | | | | | | | | | The expressions tsk->nsproxy->pid_ns and task_active_pid_ns aka ns_of_pid(task_pid(tsk)) should have the same number of cache line misses with the practical difference that ns_of_pid(task_pid(tsk)) is released later in a processes life. Furthermore by using task_active_pid_ns it becomes trivial to write an unshare implementation for the the pid namespace. So I have used task_active_pid_ns everywhere I can. In fork since the pid has not yet been attached to the process I use ns_of_pid, to achieve the same effect. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
* switch spufs/coredump to iterate_fd()Al Viro2012-09-26
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* new helper: done_path_create()Al Viro2012-07-29
| | | | | | releases what needs to be released after {kern,user}_path_create() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* pull unlock+dput() out into do_spu_create()Al Viro2012-07-29
| | | | | | ... and cleaning spufs_create() a bit, while we are at it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* spufs: pull unlock-and-dput() up into spufs_create()Al Viro2012-07-29
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* spufs_create_context(): simplify failure exitsAl Viro2012-07-29
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* move spu_forget() into spufs_rmdir()Al Viro2012-07-29
| | | | | | | now that __fput() is *not* done in any callchain containing mmput(), we can do that... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* switch dentry_open() to struct path, make it grab references itselfAl Viro2012-07-22
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* spufs: shift dget/mntget towards dentry_open()Al Viro2012-07-22
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: Rename end_writeback() to clear_inode()Jan Kara2012-05-06
| | | | | | | | | After we moved inode_sync_wait() from end_writeback() it doesn't make sense to call the function end_writeback() anymore. Rename it to clear_inode() which well says what the function really does - set I_CLEAR flag. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
* Merge branch 'x86-x32-for-linus' of ↵Linus Torvalds2012-03-29
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x32 support for x86-64 from Ingo Molnar: "This tree introduces the X32 binary format and execution mode for x86: 32-bit data space binaries using 64-bit instructions and 64-bit kernel syscalls. This allows applications whose working set fits into a 32 bits address space to make use of 64-bit instructions while using a 32-bit address space with shorter pointers, more compressed data structures, etc." Fix up trivial context conflicts in arch/x86/{Kconfig,vdso/vma.c} * 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (71 commits) x32: Fix alignment fail in struct compat_siginfo x32: Fix stupid ia32/x32 inversion in the siginfo format x32: Add ptrace for x32 x32: Switch to a 64-bit clock_t x32: Provide separate is_ia32_task() and is_x32_task() predicates x86, mtrr: Use explicit sizing and padding for the 64-bit ioctls x86/x32: Fix the binutils auto-detect x32: Warn and disable rather than error if binutils too old x32: Only clear TIF_X32 flag once x32: Make sure TS_COMPAT is cleared for x32 tasks fs: Remove missed ->fds_bits from cessation use of fd_set structs internally fs: Fix close_on_exec pointer in alloc_fdtable x32: Drop non-__vdso weak symbols from the x32 VDSO x32: Fix coding style violations in the x32 VDSO code x32: Add x32 VDSO support x32: Allow x32 to be configured x32: If configured, add x32 system calls to system call tables x32: Handle process creation x32: Signal-related system calls x86: Add #ifdef CONFIG_COMPAT to <asm/sys_ia32.h> ...
| * Wrap accesses to the fd_sets in struct fdtableDavid Howells2012-02-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Wrap accesses to the fd_sets in struct fdtable (for recording open files and close-on-exec flags) so that we can move away from using fd_sets since we abuse the fd_set structs by not allocating the full-sized structure under normal circumstances and by non-core code looking at the internals of the fd_sets. The first abuse means that use of FD_ZERO() on these fd_sets is not permitted, since that cannot be told about their abnormal lengths. This introduces six wrapper functions for setting, clearing and testing close-on-exec flags and fd-is-open flags: void __set_close_on_exec(int fd, struct fdtable *fdt); void __clear_close_on_exec(int fd, struct fdtable *fdt); bool close_on_exec(int fd, const struct fdtable *fdt); void __set_open_fd(int fd, struct fdtable *fdt); void __clear_open_fd(int fd, struct fdtable *fdt); bool fd_is_open(int fd, const struct fdtable *fdt); Note that I've prepended '__' to the names of the set/clear functions because they require the caller to hold a lock to use them. Note also that I haven't added wrappers for looking behind the scenes at the the array. Possibly that should exist too. Signed-off-by: David Howells <dhowells@redhat.com> Link: http://lkml.kernel.org/r/20120216174942.23314.1364.stgit@warthog.procyon.org.uk Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'next' of ↵Linus Torvalds2012-03-21
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc merge from Benjamin Herrenschmidt: "Here's the powerpc batch for this merge window. It is going to be a bit more nasty than usual as in touching things outside of arch/powerpc mostly due to the big iSeriesectomy :-) We finally got rid of the bugger (legacy iSeries support) which was a PITA to maintain and that nobody really used anymore. Here are some of the highlights: - Legacy iSeries is gone. Thanks Stephen ! There's still some bits and pieces remaining if you do a grep -ir series arch/powerpc but they are harmless and will be removed in the next few weeks hopefully. - The 'fadump' functionality (Firmware Assisted Dump) replaces the previous (equivalent) "pHyp assisted dump"... it's a rewrite of a mechanism to get the hypervisor to do crash dumps on pSeries, the new implementation hopefully being much more reliable. Thanks Mahesh Salgaonkar. - The "EEH" code (pSeries PCI error handling & recovery) got a big spring cleaning, motivated by the need to be able to implement a new backend for it on top of some new different type of firwmare. The work isn't complete yet, but a good chunk of the cleanups is there. Note that this adds a field to struct device_node which is not very nice and which Grant objects to. I will have a patch soon that moves that to a powerpc private data structure (hopefully before rc1) and we'll improve things further later on (hopefully getting rid of the need for that pointer completely). Thanks Gavin Shan. - I dug into our exception & interrupt handling code to improve the way we do lazy interrupt handling (and make it work properly with "edge" triggered interrupt sources), and while at it found & fixed a wagon of issues in those areas, including adding support for page fault retry & fatal signals on page faults. - Your usual random batch of small fixes & updates, including a bunch of new embedded boards, both Freescale and APM based ones, etc..." I fixed up some conflicts with the generalized irq-domain changes from Grant Likely, hopefully correctly. * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (141 commits) powerpc/ps3: Do not adjust the wrapper load address powerpc: Remove the rest of the legacy iSeries include files powerpc: Remove the remaining CONFIG_PPC_ISERIES pieces init: Remove CONFIG_PPC_ISERIES powerpc: Remove FW_FEATURE ISERIES from arch code tty/hvc_vio: FW_FEATURE_ISERIES is no longer selectable powerpc/spufs: Fix double unlocks powerpc/5200: convert mpc5200 to use of_platform_populate() powerpc/mpc5200: add options to mpc5200_defconfig powerpc/mpc52xx: add a4m072 board support powerpc/mpc5200: update mpc5200_defconfig to fit for charon board Documentation/powerpc/mpc52xx.txt: Checkpatch cleanup powerpc/44x: Add additional device support for APM821xx SoC and Bluestone board powerpc/44x: Add support PCI-E for APM821xx SoC and Bluestone board MAINTAINERS: Update PowerPC 4xx tree powerpc/44x: The bug fixed support for APM821xx SoC and Bluestone board powerpc: document the FSL MPIC message register binding powerpc: add support for MPIC message register API powerpc/fsl: Added aliased MSIIR register address to MSI node in dts powerpc/85xx: mpc8548cds - add 36-bit dts ...
| * | powerpc/spufs: Fix double unlocksBenjamin Herrenschmidt2012-03-20
| |/ | | | | | | | | | | | | spufs return path has a bug where it could end up trying to unlock an inode mutex twice. Fix it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | spufs: make register_filesystem the last potential failure exitAl Viro2012-03-20
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | switch open-coded instances of d_make_root() to new helperAl Viro2012-03-20
|/ | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* switch spufs guts to umode_tAl Viro2012-01-03
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: fix the stupidity with i_dentry in inode destructorsAl Viro2012-01-03
| | | | | | | | | | Seeing that just about every destructor got that INIT_LIST_HEAD() copied into it, there is no point whatsoever keeping this INIT_LIST_HEAD in inode_init_once(); the cost of taking it into inode_init_always() will be negligible for pipes and sockets and negative for everything else. Not to mention the removal of boilerplate code from ->destroy_inode() instances... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* powerpc: remove non-required uses of include <linux/module.h>Paul Gortmaker2011-10-31
| | | | | | | | | | | None of the files touched here are modules, and they are not exporting any symbols either -- so there is no need to be including the module.h. Builds of all the files remains successful. Even kernel/module.c does not need to include it, since it includes linux/moduleloader.h instead. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* powerpc: various straight conversions from module.h --> export.hPaul Gortmaker2011-10-31
| | | | | | | | | All these files were including module.h just for the basic EXPORT_SYMBOL infrastructure. We can shift them off to the export.h header which is a way smaller footprint and thus realize some compile time gains. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* powerpc: Fix up implicit sched.h usersPaul Gortmaker2011-10-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | They are getting it through device.h --> module.h path, but we want to clean that up. This is a sample of what will happen if we don't: pseries/iommu.c: In function 'tce_build_pSeriesLP': pseries/iommu.c:136: error: implicit declaration of function 'show_stack' pseries/eeh.c: In function 'eeh_token_to_phys': pseries/eeh.c:359: error: 'init_mm' undeclared (first use in this function) pseries/eeh_event.c: In function 'eeh_event_handler': pseries/eeh_event.c:63: error: implicit declaration of function 'daemonize' pseries/eeh_event.c:64: error: implicit declaration of function 'set_current_state' pseries/eeh_event.c:64: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function) pseries/eeh_event.c:64: error: (Each undeclared identifier is reported only once pseries/eeh_event.c:64: error: for each function it appears in.) pseries/eeh_event.c: In function 'eeh_thread_launcher': pseries/eeh_event.c:109: error: 'CLONE_KERNEL' undeclared (first use in this function) hotplug-cpu.c: In function 'pseries_mach_cpu_die': hotplug-cpu.c:115: error: implicit declaration of function 'idle_task_exit' kernel/swsusp_64.c: In function 'do_after_copyback': kernel/swsusp_64.c:17: error: implicit declaration of function 'touch_softlockup_watchdog' cell/spufs/context.c: In function 'alloc_spu_context': cell/spufs/context.c:60: error: implicit declaration of function 'get_task_mm' cell/spufs/context.c:60: warning: assignment makes pointer from integer without a cast cell/spufs/context.c: In function 'spu_forget': cell/spufs/context.c:127: error: implicit declaration of function 'mmput' pasemi/dma_lib.c: In function 'pasemi_dma_stop_chan': pasemi/dma_lib.c:332: error: implicit declaration of function 'cond_resched' sysdev/fsl_lbc.c: In function 'fsl_lbc_ctrl_irq': sysdev/fsl_lbc.c:247: error: 'TASK_NORMAL' undeclared (first use in this function) Add in sched.h so these get the definitions they are looking for. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* atomic: use <linux/atomic.h>Arun Sharma2011-07-26
| | | | | | | | | | | | | | This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlersJosef Bacik2011-07-20
| | | | | | | | | | | | | | | Btrfs needs to be able to control how filemap_write_and_wait_range() is called in fsync to make it less of a painful operation, so push down taking i_mutex and the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some file systems can drop taking the i_mutex altogether it seems, like ext3 and ocfs2. For correctness sake I just pushed everything down in all cases to make sure that we keep the current behavior the same for everybody, and then each individual fs maintainer can make up their mind about what to do from there. Thanks, Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* switch do_spufs_create() to user_path_create(), fix double-unlockAl Viro2011-07-20
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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