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2016-10-08befs: fix typos in btree.cLuis de Bethencourt1-4/+3
Fixing typos in kernel-doc function descriptions in fs/befs/btree.c. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Salah Triki <salah.triki@gmail.com>
2016-10-08befs: fix style issues in super.cLuis de Bethencourt1-7/+8
Fixing the following checkpatch.pl error: ERROR: "foo * bar" should be "foo *bar" +befs_load_sb(struct super_block *sb, befs_super_block * disk_sb) And the following warnings: WARNING: suspect code indent for conditional statements (8, 12) + if (disk_sb->fs_byte_order == BEFS_BYTEORDER_NATIVE_LE) + befs_sb->byte_order = BEFS_BYTESEX_LE; WARNING: suspect code indent for conditional statements (8, 12) + else if (disk_sb->fs_byte_order == BEFS_BYTEORDER_NATIVE_BE) + befs_sb->byte_order = BEFS_BYTESEX_BE; WARNING: break quoted strings at a space character + befs_error(sb, "blocksize(%u) cannot be larger" + "than system pagesize(%lu)", befs_sb->block_size, WARNING: line over 80 characters + if (befs_sb->log_start != befs_sb->log_end || befs_sb->flags == BEFS_DIRTY) { Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Salah Triki <salah.triki@gmail.com>
2016-10-08befs: fix comment styleLuis de Bethencourt1-7/+3
The description of befs_load_sb was confusing the kernel-doc system since, because it starts with /**, it thinks it will document the function with kernel-doc formatting. Which it isn't. Fix other comment style issues in the file while we are at it. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Salah Triki <salah.triki@gmail.com>
2016-10-08befs: add check for ag_shift in superblockLuis de Bethencourt1-0/+7
ag_shift and blocks_per_ag contain the same information in different ways, same as block_shift and block_size do. It is worth checking this two are consistent, but since blocks_per_ag isn't documented as mandatory to use some implementations of befs don't enforce this, so making it non-fatal if they don't match and just having it as a warning. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Salah Triki <salah.triki@gmail.com>
2016-10-08befs: dump inode_size superblock informationLuis de Bethencourt1-0/+1
befs_dump_super_block() wasn't giving the inode_size information when dumping all elements of the superblock. Add this element to have complete information of the superblock. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Salah Triki <salah.triki@gmail.com>
2016-10-08befs: remove unnecessary initializationSalah Triki1-1/+1
There is no need to init block, since it will be overwitten later by iaddr2blockno(). Signed-off-by: Salah Triki <salah.triki@gmail.com> Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08befs: fix typo in befs_sb_infoSalah Triki1-1/+1
Fixing jornal to Journal. Signed-off-by: Salah Triki <salah.triki@gmail.com> Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08befs: add flags field to validate superblock stateSalah Triki2-1/+6
For validating superblock state, add flags field to befs_sb_info, read the state from the disk and check if it is equal to BEFS_DIRTY. Signed-off-by: Salah Triki <salah.triki@gmail.com> Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08befs: fix typo in befs_find_keyLuis de Bethencourt1-1/+1
Fixing skeep to skip. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Salah Triki <salah.triki@gmail.com>
2016-10-08befs: remove unused BEFS_BT_PARMATCHLuis de Bethencourt2-19/+16
befs_btree_find(), the only caller of befs_find_key(), only cares about if the return from that function is BEFS_BT_MATCH or not. It never uses the partial match given with BEFS_BT_PARMATCH. Make the overflow return clearer by having BEFS_BT_OVERFLOW instead of BEFS_BT_PARMATCH. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Salah Triki <salah.triki@gmail.com>
2016-10-08fs: befs: remove ret variableSalah Triki1-2/+1
ret is initialized to -EIO and is never modified, so remove ret and use -EIO directly. Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: remove in vain variable assignmentSalah Triki1-1/+1
There is no need to init res, since it will be overwitten later by befs_fblock2brun(). Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: remove unnecessary *befs_sb variableSalah Triki1-2/+1
Remove *befs_sb and just call BEFS_SB(sb) directly, since the returned value by this function is only used once. Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: remove useless initialization to zeroSalah Triki1-1/+1
node_off is unconditionally set to bt_super.root_node_ptr, so no need to init it to zero. Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: remove in vain variable assignmentSalah Triki1-2/+0
There is no need to set *value, it will be overwritten later. Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: Insert NULL inode to dentrySalah Triki1-0/+1
As VFS expects, lookup inserts NULL inode to dentry when the named inode does not exist. Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: Remove useless calls to brelse in befs_find_brun_dblindirectSalah Triki1-2/+0
The calls to brelse are useless since dbl_indir_block and indir_block are NULL. Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: Coding style fixSalah Triki1-3/+3
Constant has to be capitalized. Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: Remove redundant validation from befs_find_brun_directSalah Triki1-8/+0
The only caller of befs_find_brun_direct is befs_fblock2brun, which already validates that the block is within the range of direct blocks. So remove the duplicate validation. Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08befs: fix typo in befs_bt_read_node documentationLuis de Bethencourt1-2/+2
Fixing a grammatical error in the documentation. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08befs: in memory free_node_ptr and max_size never readLuis de Bethencourt1-2/+0
The only place the values of free_node_ptr and max_size are read is in befs_dump_index_entry(), which both times it is called, it is passed the on disk superblock. Removing assignment of unused values. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08befs: make consistent use of befs_error()Luis de Bethencourt3-4/+9
befs_error() is used in potential errors that could happen in befs to provide informational log messages. befs_debug() is silent when CONFIG_BEFS_DEBUG=no, and very verbose when switched on, which is why it is used for general debugging but not for errors. Fix a few cases where the befs debug utility usage isn't following the expected pattern. To make sure we have consistent information in the logs. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08befs: use simpler while loopLuis de Bethencourt1-36/+38
Replace goto with simpler while loop to make befs_readdir() more readable. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08befs: remove constant variableLuis de Bethencourt1-5/+2
Use macro directly instead of via assigning it to an unchanging variable. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Acked-by: Salah Triki <salah.triki@gmail.com>
2016-10-08befs: avoid dereferencing dentry twiceLuis de Bethencourt1-1/+1
No need to dereference dentry twice to get the name when we already have it stored in a local variable. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: remove comment that confuses kernel-docLuis de Bethencourt1-4/+0
This comment with a mysterious unfinished line confuses the kernel-doc system since, because it starts with /**, it thinks it is documenting a function. Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
2016-10-08fs: befs: check silent flag before logging errorLuis de Bethencourt1-1/+2
Log error only when silent flag is not set. Fixes: dbe6460388bc ("fs/befs/linuxvfs.c: check silent flag before logging errors") Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Acked-by: Salah Triki <salah.triki@gmail.com>
2016-10-08fs: befs: replace befs_bread by sb_breadSalah Triki4-30/+4
Since befs_bread merely calls sb_bread, replace it by sb_bread. Link: http://lkml.kernel.org/r/1466800258-4542-1-git-send-email-salah.triki@gmail.com Signed-off-by: Salah Triki <salah.triki@gmail.com> Acked-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2016-10-08befs: remove unused functionsLuis de Bethencourt1-12/+0
befs_iaddr_is_empty() and befs_brun_size() are unused. Remove them. Link: http://lkml.kernel.org/r/1465700235-22881-3-git-send-email-luisbg@osg.samsung.com Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2016-10-08befs: fix function name in documentationLuis de Bethencourt1-1/+1
Documentation of function befs_load_cb() lists it as load_befs_sb(). Fix the misnomer. Link: http://lkml.kernel.org/r/1465700235-22881-2-git-send-email-luisbg@osg.samsung.com Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2016-10-08befs: check return of sb_min_blocksizeLuis de Bethencourt1-1/+6
Confirm sb_min_blocksize() succeeded before continuing. Link: http://lkml.kernel.org/r/1465700235-22881-1-git-send-email-luisbg@osg.samsung.com Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2016-10-08fs: befs: remove useless pr_err in befs_init_inodecache()Salah Triki1-4/+2
Remove pr_err since kmem_cache_create log error and dump stack. Link: http://lkml.kernel.org/r/e6d03cbc9542495dc6174b59e32fcd41c1393cfc.1464226521.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org>
2016-10-08fs/befs/linuxvfs.c: remove useless befs_errorSalah Triki1-2/+0
Remove befs_error since when kmalloc fails there is a generic out of memory and stack dump. Link: http://lkml.kernel.org/r/3de4d388d98bbb570462a5eb8e64623e17fb5d74.1464226521.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2016-10-08fs/befs/linuxvfs.c: remove useless pr_err in befs_fill_super()Salah Triki1-4/+2
Remove pr_err since when kzalloc fails there is a generic out of memory and stack dump. Link: http://lkml.kernel.org/r/c5a7f2d42ec0fc8465c118248e88cd221c483391.1464226521.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2016-10-08fs/befs/linuxvfs.c: check silent flag before logging errorsSalah Triki1-6/+9
Log errors only when silent flag is not set. Link: http://lkml.kernel.org/r/d400aaf5a7430de79bd956e40ec075fb1cb08474.1464226521.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2016-10-08fs/befs/linuxvfs.c: move useless assignmentSalah Triki1-1/+1
Control is transfered to unacquire_none when sb->s_fs_info is equal to NULL, so the assignment to NULL is useless and it is moved above unacquire_none. Link: http://lkml.kernel.org/r/ed41da113fc693c7daa4e8813ca04cc766ddfc05.1464226521.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2016-10-02Linux 4.8Linus Torvalds1-1/+1
2016-10-02ARM: 8618/1: decompressor: reset ttbcr fields to use TTBR0 on ARMv7Srinivas Ramana1-1/+1
If the bootloader uses the long descriptor format and jumps to kernel decompressor code, TTBCR may not be in a right state. Before enabling the MMU, it is required to clear the TTBCR.PD0 field to use TTBR0 for translation table walks. The commit dbece45894d3a ("ARM: 7501/1: decompressor: reset ttbcr for VMSA ARMv7 cores") does the reset of TTBCR.N, but doesn't consider all the bits for the size of TTBCR.N. Clear TTBCR.PD0 field and reset all the three bits of TTBCR.N to indicate the use of TTBR0 and the correct base address width. Fixes: dbece45894d3 ("ARM: 7501/1: decompressor: reset ttbcr for VMSA ARMv7 cores") Acked-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Srinivas Ramana <sramana@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-10-02MIPS: CM: Fix mips_cm_max_vp_width for non-MT kernels on MT systemsPaul Burton1-0/+11
When discovering the number of VPEs per core, smp_num_siblings will be incorrect for kernels built without support for the MIPS MultiThreading (MT) ASE running on systems which implement said ASE. This leads to accesses to VPEs in secondary cores being performed incorrectly since mips_cm_vp_id calculates the wrong ID to write to the local "other" registers. Fix this by examining the number of VPEs in the core as reported by the CM. This patch presumes that the number of VPEs will be the same in each core of the system. As this path only applies to systems with CM version 2.5 or lower, and this property is true of all such known systems, this is likely to be fine but is described in a comment for good measure. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14338/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-09-30include/linux/property.h: fix typo/compile errorJohn Youn1-1/+1
This fixes commit d76eebfa175e ("include/linux/property.h: fix build issues with gcc-4.4.4"). With that commit we get the following compile error when using the PROPERTY_ENTRY_INTEGER_ARRAY macro. include/linux/property.h:201:39: error: `u32_data' undeclared (first use in this function) PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u32, _val_) ^ include/linux/property.h:193:17: note: in definition of macro `PROPERTY_ENTRY_INTEGER_ARRAY' { .pointer = { _type_##_data = _val_ } }, \ ^ This needs a '.' to reference the union member. It seems this was just overlooked here since it is done correctly in similar constructs in other parts of the original commit. This fix is in preparation of upcoming commits that will use this macro. Fixes: commit d76eebfa175e ("include/linux/property.h: fix build issues with gcc-4.4.4") Link: http://lkml.kernel.org/r/2de3b929290d88a723ed829a3e3cbd02044714df.1475114627.git.johnyoun@synopsys.com Signed-off-by: John Youn <johnyoun@synopsys.com> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-30ocfs2: fix deadlock on mmapped page in ocfs2_write_begin_nolock()Eric Ren1-0/+10
The testcase "mmaptruncate" of ocfs2-test deadlocks occasionally. In this testcase, we create a 2*CLUSTER_SIZE file and mmap() on it; there are 2 process repeatedly performing the following operations respectively: one is doing memset(mmaped_addr + 2*CLUSTER_SIZE - 1, 'a', 1), while the another is playing ftruncate(fd, 2*CLUSTER_SIZE) and then ftruncate(fd, CLUSTER_SIZE) again and again. This is the backtrace when the deadlock happens: __wait_on_bit_lock+0x50/0xa0 __lock_page+0xb7/0xc0 ocfs2_write_begin_nolock+0x163f/0x1790 [ocfs2] ocfs2_page_mkwrite+0x1c7/0x2a0 [ocfs2] do_page_mkwrite+0x66/0xc0 handle_mm_fault+0x685/0x1350 __do_page_fault+0x1d8/0x4d0 trace_do_page_fault+0x37/0xf0 do_async_page_fault+0x19/0x70 async_page_fault+0x28/0x30 In ocfs2_write_begin_nolock(), we first grab the pages and then allocate disk space for this write; ocfs2_try_to_free_truncate_log() will be called if -ENOSPC is returned; if we're lucky to get enough clusters, which is usually the case, we start over again. But in ocfs2_free_write_ctxt() the target page isn't unlocked, so we will deadlock when trying to grab the target page again. Also, -ENOMEM might be returned in ocfs2_grab_pages_for_write(). Another deadlock will happen in __do_page_mkwrite() if ocfs2_page_mkwrite() returns non-VM_FAULT_LOCKED, and along with a locked target page. These two errors fail on the same path, so fix them by unlocking the target page manually before ocfs2_free_write_ctxt(). Jan Kara helps me clear out the JBD2 part, and suggest the hint for root cause. Changes since v1: 1. Also put ENOMEM error case into consideration. Link: http://lkml.kernel.org/r/1474173902-32075-1-git-send-email-zren@suse.com Signed-off-by: Eric Ren <zren@suse.com> Reviewed-by: He Gang <ghe@suse.com> Acked-by: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-30mm: workingset: fix crash in shadow node shrinker caused by replace_page_cache_page()Johannes Weiner3-63/+63
Antonio reports the following crash when using fuse under memory pressure: kernel BUG at /build/linux-a2WvEb/linux-4.4.0/mm/workingset.c:346! invalid opcode: 0000 [#1] SMP Modules linked in: all of them CPU: 2 PID: 63 Comm: kswapd0 Not tainted 4.4.0-36-generic #55-Ubuntu Hardware name: System manufacturer System Product Name/P8H67-M PRO, BIOS 3904 04/27/2013 task: ffff88040cae6040 ti: ffff880407488000 task.ti: ffff880407488000 RIP: shadow_lru_isolate+0x181/0x190 Call Trace: __list_lru_walk_one.isra.3+0x8f/0x130 list_lru_walk_one+0x23/0x30 scan_shadow_nodes+0x34/0x50 shrink_slab.part.40+0x1ed/0x3d0 shrink_zone+0x2ca/0x2e0 kswapd+0x51e/0x990 kthread+0xd8/0xf0 ret_from_fork+0x3f/0x70 which corresponds to the following sanity check in the shadow node tracking: BUG_ON(node->count & RADIX_TREE_COUNT_MASK); The workingset code tracks radix tree nodes that exclusively contain shadow entries of evicted pages in them, and this (somewhat obscure) line checks whether there are real pages left that would interfere with reclaim of the radix tree node under memory pressure. While discussing ways how fuse might sneak pages into the radix tree past the workingset code, Miklos pointed to replace_page_cache_page(), and indeed there is a problem there: it properly accounts for the old page being removed - __delete_from_page_cache() does that - but then does a raw raw radix_tree_insert(), not accounting for the replacement page. Eventually the page count bits in node->count underflow while leaving the node incorrectly linked to the shadow node LRU. To address this, make sure replace_page_cache_page() uses the tracked page insertion code, page_cache_tree_insert(). This fixes the page accounting and makes sure page-containing nodes are properly unlinked from the shadow node LRU again. Also, make the sanity checks a bit less obscure by using the helpers for checking the number of pages and shadows in a radix tree node. Fixes: 449dd6984d0e ("mm: keep page cache radix tree nodes in check") Link: http://lkml.kernel.org/r/20160919155822.29498-1-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reported-by: Antonio SJ Musumeci <trapexit@spawn.link> Debugged-by: Miklos Szeredi <miklos@szeredi.hu> Cc: <stable@vger.kernel.org> [3.15+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-30MAINTAINERS: Switch to kernel.org email address for Javi MerinoJavi Merino2-1/+2
Change my email address to my kernel.org account instead of the ARM one. Signed-off-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-30x86/entry/64: Fix context tracking state warning when load_gs_index failsWanpeng Li1-2/+2
This warning: WARNING: CPU: 0 PID: 3331 at arch/x86/entry/common.c:45 enter_from_user_mode+0x32/0x50 CPU: 0 PID: 3331 Comm: ldt_gdt_64 Not tainted 4.8.0-rc7+ #13 Call Trace: dump_stack+0x99/0xd0 __warn+0xd1/0xf0 warn_slowpath_null+0x1d/0x20 enter_from_user_mode+0x32/0x50 error_entry+0x6d/0xc0 ? general_protection+0x12/0x30 ? native_load_gs_index+0xd/0x20 ? do_set_thread_area+0x19c/0x1f0 SyS_set_thread_area+0x24/0x30 do_int80_syscall_32+0x7c/0x220 entry_INT80_compat+0x38/0x50 ... can be reproduced by running the GS testcase of the ldt_gdt test unit in the x86 selftests. do_int80_syscall_32() will call enter_form_user_mode() to convert context tracking state from user state to kernel state. The load_gs_index() call can fail with user gsbase, gsbase will be fixed up and proceed if this happen. However, enter_from_user_mode() will be called again in the fixed up path though it is context tracking kernel state currently. This patch fixes it by just fixing up gsbase and telling lockdep that IRQs are off once load_gs_index() failed with user gsbase. Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com> Acked-by: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1475197266-3440-1-git-send-email-wanpeng.li@hotmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-30x86/boot: Initialize FPU and X86_FEATURE_ALWAYS even if we don't have CPUIDAndy Lutomirski1-12/+11
Otherwise arch_task_struct_size == 0 and we die. While we're at it, set X86_FEATURE_ALWAYS, too. Reported-by: David Saggiorato <david@saggiorato.net> Tested-by: David Saggiorato <david@saggiorato.net> Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave@sr71.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Fixes: aaeb5c01c5b ("x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86") Link: http://lkml.kernel.org/r/8de723afbf0811071185039f9088733188b606c9.1475103911.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-30x86/vdso: Fix building on big endian hostSegher Boessenkool1-1/+1
We need to call GET_LE to read hdr->e_type. Fixes: 57f90c3dfc75 ("x86/vdso: Error out if the vDSO isn't a valid DSO") Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org> Acked-by: Andy Lutomirski <luto@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: linux-next@vger.kernel.org Link: http://lkml.kernel.org/r/20160929193442.GA16617@gate.crashing.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-09-30x86/boot: Fix another __read_cr4() case on 486Andy Lutomirski1-3/+1
The condition for reading CR4 was wrong: there are some CPUs with CPUID but not CR4. Rather than trying to make the condition exact, use __read_cr4_safe(). Fixes: 18bc7bd523e0 ("x86/boot: Synchronize trampoline_cr4_features and mmu_cr4_features directly") Reported-by: david@saggiorato.net Signed-off-by: Andy Lutomirski <luto@kernel.org> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Link: http://lkml.kernel.org/r/8c453a61c4f44ab6ff43c29780ba04835234d2e5.1475178369.git.luto@kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-09-30sctp: fix the issue sctp_diag uses lock_sock in rcu_read_lockXin Long2-21/+47
When sctp dumps all the ep->assocs, it needs to lock_sock first, but now it locks sock in rcu_read_lock, and lock_sock may sleep, which would break rcu_read_lock. This patch is to get and hold one sock when traversing the list. After that and get out of rcu_read_lock, lock and dump it. Then it will traverse the list again to get the next one until all sctp socks are dumped. For sctp_diag_dump_one, it fixes this issue by holding asoc and moving cb() out of rcu_read_lock in sctp_transport_lookup_process. Fixes: 8f840e47f190 ("sctp: add the sctp_diag.c file") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-30sctp: change to check peer prsctp_capable when using prsctp policesXin Long2-6/+6
Now before using prsctp polices, sctp uses asoc->prsctp_enable to check if prsctp is enabled. However asoc->prsctp_enable is set only means local host support prsctp, sctp should not abandon packet if peer host doesn't enable prsctp. So this patch is to use asoc->peer.prsctp_capable to check if prsctp is enabled on both side, instead of asoc->prsctp_enable, as asoc's peer.prsctp_capable is set only when local and peer both enable prsctp. Fixes: a6c2f792873a ("sctp: implement prsctp TTL policy") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-30sctp: remove prsctp_param from sctp_chunkXin Long4-26/+9
Now sctp uses chunk->prsctp_param to save the prsctp param for all the prsctp polices, we didn't need to introduce prsctp_param to sctp_chunk. We can just use chunk->sinfo.sinfo_timetolive for RTX and BUF polices, and reuse msg->expires_at for TTL policy, as the prsctp polices and old expires policy are mutual exclusive. This patch is to remove prsctp_param from sctp_chunk, and reuse msg's expires_at for TTL and chunk's sinfo.sinfo_timetolive for RTX and BUF polices. Note that sctp can't use chunk's sinfo.sinfo_timetolive for TTL policy, as it needs a u64 variables to save the expires_at time. This one also fixes the "netperf-Throughput_Mbps -37.2% regression" issue. Fixes: a6c2f792873a ("sctp: implement prsctp TTL policy") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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