Arnd Bergmann
a84d116916
y2038: Introduce struct __kernel_old_timeval ...
Dealing with 'struct timeval' users in the y2038 series is a bit tricky:
We have two definitions of timeval that are visible to user space,
one comes from glibc (or some other C library), the other comes from
linux/time.h. The kernel copy is what we want to be used for a number of
structures defined by the kernel itself, e.g. elf_prstatus (used it core
dumps), sysinfo and rusage (used in system calls). These generally tend
to be used for passing time intervals rather than absolute (epoch-based)
times, so they do not suffer from the y2038 overflow. Some of them
could be changed to use 64-bit timestamps by creating new system calls,
others like the core files cannot easily be changed.
An application using these interfaces likely also uses gettimeofday()
or other interfaces that use absolute times, and pass 'struct timeval'
pointers directly into kernel interfaces, so glibc must redefine their
timeval based on a 64-bit time_t when they introduce their y2038-safe
interfaces.
The only reasonable way forward I see is to remove the 'timeval'
definion from the kernel's uapi headers, and change the interfaces that
we do not want to (or cannot) duplicate for 64-bit times to use a new
__kernel_old_timeval definition instead. This type should be avoided
for all new interfaces (those can use 64-bit nanoseconds, or the 64-bit
version of timespec instead), and should be used with great care when
converting existing interfaces from timeval, to be sure they don't suffer
from the y2038 overflow, and only with consensus for the particular user
that using __kernel_old_timeval is better than moving to a 64-bit based
interface. The structure name is intentionally chosen to not conflict
with user space types, and to be ugly enough to discourage its use.
Note that ioctl based interfaces that pass a bare 'timeval' pointer
cannot change to '__kernel_old_timeval' because the user space source
code refers to 'timeval' instead, and we don't want to modify the user
space sources if possible. However, any application that relies on a
structure to contain an embedded 'timeval' (e.g. by passing a pointer
to the member into a function call that expects a timeval pointer) is
broken when that structure gets converted to __kernel_old_timeval. I
don't see any way around that, and we have to rely on the compiler to
produce a warning or compile failure that will alert users when they
recompile their sources against a new libc.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/20180315161739.576085-1-arnd@arndb.de
2018-03-19 15:23:03 +01:00
can: dev: Add support for limiting configured bitrate
2018-01-16 15:11:32 +01:00
firmware /meson
The is the bulk of GPIO changes for the v4.16 kernel cycle.
2018-01-31 12:25:27 -08:00
Staging/IIO patches for 4.16-rc1
2018-02-01 09:51:57 -08:00
RTC for 4.16
2018-02-02 14:19:19 -08:00
Second pull request for 4.16 merge window
2018-02-06 11:09:45 -08:00
mmc: slot-gpio: add a helper to check capability of GPIO WP detection
2018-01-18 09:08:56 +01:00
Core changes:
2018-01-29 09:58:36 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2018-01-31 14:31:10 -08:00
arm_pmu: acpi: request IRQs up-front
2018-02-20 11:34:54 +00:00
pinctrl: remove include file from <linux/device.h>
2018-02-03 12:10:09 -08:00
platform-drivers-x86 for v4.16-1
2018-02-06 15:30:52 -08:00
regulator: add PM suspend and resume hooks
2018-01-26 14:43:55 +00:00
Merge branch 'akpm' (patches from Andrew)
2018-02-22 10:45:46 -08:00
ARM: SoC driver updates for 4.16
2018-02-01 16:35:31 -08:00
NFS client bugfixes and latency improvements for Linux 4.16
2018-02-09 14:55:30 -08:00
device property: Constify device_get_match_data()
2018-02-12 10:41:11 +01:00
arm/arm64: smccc: Implement SMCCC v1.1 inline primitive
2018-02-06 22:54:15 +00:00
lockdep: Convert some users to const
2018-01-18 11:56:49 +01:00
Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block
2018-01-29 11:51:49 -08:00
lib: optimize cpumask_next_and()
2018-02-06 18:32:44 -08:00
blkcg: simplify statistic accumulation code
2018-01-16 08:56:36 -07:00
blk-mq: introduce BLK_STS_DEV_RESOURCE
2018-01-30 20:18:28 -07:00
block: fix a typo in comment of BLK_MQ_POLL_STATS_BKTS
2018-02-15 08:27:06 -07:00
bpf: offload: report device information about offloaded maps
2018-01-18 22:54:25 +01:00
for-linus-20180204
2018-02-04 11:16:35 -08:00
build_bug.h: remove BUILD_BUG_ON_NULL()
2018-02-06 18:32:46 -08:00
Merge branches 'clk-remove-asm-clkdev', 'clk-debugfs-fixes', 'clk-renesas' and 'clk-meson' into clk-next
2018-01-26 16:43:32 -08:00
signal: Unify and correct copy_siginfo_from_user32
2018-01-15 17:55:59 -06:00
kasan: add compiler support for clang
2018-02-06 18:32:42 -08:00
bug.h: work around GCC PR82365 in BUG()
2018-02-21 15:35:43 -08:00
bug.h: work around GCC PR82365 in BUG()
2018-02-21 15:35:43 -08:00
cpufreq: Add and use cpufreq_for_each_{valid_,}entry_idx()
2018-02-08 10:21:39 +01:00
Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
2018-02-02 09:50:51 -08:00
Merge branches 'pm-cpuidle' and 'pm-opp'
2018-02-15 12:01:53 +01:00
cpumask: Make for_each_cpu_wrap() available on UP as well
2018-02-16 10:40:24 +01:00
kernel/cpuset: current_cpuset_is_being_rebound can be boolean
2018-02-06 18:32:47 -08:00
crash_dump: is_kdump_kernel can be boolean
2018-02-06 18:32:47 -08:00
vfs: factor out helpers d_instantiate_anon() and d_alloc_anon()
2018-01-24 11:25:59 +01:00
delayacct: Account blkio completion on the correct task
2018-01-16 03:29:36 +01:00
dm mpath: delay the retry of a request if the target responded as busy
2018-01-29 13:44:54 -05:00
pinctrl: remove include file from <linux/device.h>
2018-02-03 12:10:09 -08:00
dma-mapping: fix a comment typo
2018-02-12 15:59:08 +00:00
Merge branch 'next-tpm' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2018-01-31 13:12:31 -08:00
block: Unexport elv_register_queue() and elv_unregister_queue()
2018-01-18 12:54:41 -07:00
net: Extra '_get' in declaration of arch_get_platform_mac_address
2018-02-08 15:13:30 -05:00
f2fs: support inode creation time
2018-01-25 14:10:39 -08:00
fbdev changes for v4.16:
2018-02-07 13:10:43 -08:00
vfs, fdtable: Prevent bounds-check bypass via speculative execution
2018-01-30 21:54:32 +01:00
bpf: make unknown opcode handling more robust
2018-01-26 16:42:05 -08:00
New in this version:
2018-01-31 10:18:00 -08:00
init_task out-of-lining
2018-01-29 09:08:34 -08:00
device property: Constify device_get_match_data()
2018-02-12 10:41:11 +01:00
include/linux/genl_magic_func.h: remove own BUILD_BUG_ON*() defines
2018-02-06 18:32:46 -08:00
hrtimer: Unify MONOTONIC and BOOTTIME clock behavior
2018-03-13 07:34:23 +01:00
hugetlb, mbind: fall back to default policy if vma is NULL
2018-01-31 17:18:40 -08:00
i2c: add 'set_sda' to bus_recovery_info
2018-01-16 00:04:19 +01:00
idr: Add documentation
2018-02-06 16:41:29 -05:00
devinet_ioctl(): take copyin/copyout to caller
2018-01-24 19:13:45 -05:00
x86/retpoline: Avoid retpolines for built-in __init functions
2018-02-02 12:28:27 +01:00
Expand INIT_STRUCT_PID and remove
2018-01-17 11:30:16 +00:00
iommu/vt-d: Add a check for 5-level paging support
2018-01-17 15:02:50 +01:00
kernel/resource: iomem_is_exclusive can be boolean
2018-02-06 18:32:47 -08:00
init_task out-of-lining
2018-01-29 09:08:34 -08:00
iversion: Rename make inode_cmp_iversion{+raw} to inode_eq_iversion{+raw}
2018-02-01 08:15:25 -05:00
jump_label: Add branch hints to static_branch_{un,}likely()
2018-02-06 10:28:57 +01:00
kallsyms: let print_ip_sym() print raw addresses
2018-02-06 18:32:45 -08:00
kasan: clean up KASAN_SHADOW_SCALE_SHIFT usage
2018-02-06 18:32:43 -08:00
Merge branch 'akpm' (patches from Andrew)
2018-02-22 10:45:46 -08:00
vfs/proc/kcore, x86/mm/kcore: Fix SMAP fault when dumping vsyscall user page
2018-02-13 09:15:58 +01:00
acpi: nfit: add persistent memory control flag for nd_region
2018-02-01 15:01:15 -07:00
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-01-30 10:44:56 -08:00
lib/lockref: __lockref_is_dead can be boolean
2018-02-06 18:32:47 -08:00
mm/memblock: memblock_is_map/region_memory can be boolean
2018-02-06 18:32:47 -08:00
mm: memcontrol: fix NR_WRITEBACK leak in memcg and system stats
2018-02-21 15:35:42 -08:00
libnvdimm for 4.16
2018-02-06 10:41:33 -08:00
x86/mm, mm/hwpoison: Don't unconditionally unmap kernel 1:1 pages
2018-02-13 16:25:06 +01:00
mm: remove reference to PG_buddy
2018-01-31 17:18:38 -08:00
mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks
2018-01-31 17:18:38 -08:00
include/linux/mmzone.h: fix explanation of lower bits in the SPARSEMEM mem_map pointer
2018-01-31 17:18:39 -08:00
kernel/module: module_is_live can be boolean
2018-02-06 18:32:47 -08:00
locking/mutex: Add comment to __mutex_owner() to deter usage
2018-02-21 08:56:40 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2018-01-31 14:31:10 -08:00
net/dim: Fix fixpoint divide exception in net_dim_stats_compare
2018-01-19 14:53:32 -05:00
bpf: fix null pointer deref in bpf_prog_test_run_xdp
2018-02-01 07:43:56 -08:00
nospec: Move array_index_nospec() parameter checking into separate macro
2018-02-15 01:15:51 +01:00
NTB: Fix UB/bug in ntb_mw_get_align()
2018-01-28 22:17:24 -05:00
nubus: Add support for the driver model
2018-01-16 16:47:29 +01:00
nvme-pci: clean up SMBSZ bit definitions
2018-01-17 17:55:14 +01:00
DeviceTree updates for 4.16:
2018-02-01 10:57:45 -08:00
DeviceTree updates for 4.16:
2018-02-01 10:57:45 -08:00
iommu: Clean up of_iommu_init_fn
2018-01-17 15:25:50 +01:00
PCI: Make of_irq_parse_pci() static
2018-01-25 08:48:20 -06:00
mm: remove PG_highmem description
2018-01-31 17:18:40 -08:00
mm: get 7% more pages in a pagevec
2018-01-31 17:18:37 -08:00
PCI: Remove NULL device handling from PCI DMA API
2018-01-17 18:05:51 -06:00
PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate
2018-01-28 15:48:29 -06:00
PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate
2018-01-28 15:48:29 -06:00
Merge branch 'pci/spdx' into next
2018-02-01 11:40:07 -06:00
PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate
2018-01-28 15:48:29 -06:00
pci-v4.16-changes
2018-02-06 09:59:40 -08:00
PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate
2018-01-28 15:49:06 -06:00
wireless-drivers-next patches for 4.16
2018-02-08 15:32:25 -05:00
mm, dax: introduce pfn_t_special()
2018-01-19 16:50:53 -08:00
phy: add helpers for setting/clearing bits in PHY registers
2018-01-16 12:25:10 -05:00
pipe: reject F_SETPIPE_SZ with size over UINT_MAX
2018-02-06 18:32:47 -08:00
unify {de,}mangle_poll(), get rid of kernel-side POLL...
2018-02-11 14:37:22 -08:00
device property: Constify device_get_match_data()
2018-02-12 10:41:11 +01:00
firmware/psci: Expose SMCCC version through psci_ops
2018-02-06 22:54:11 +00:00
ptr_ring: prevent integer overflow when calculating size
2018-02-11 22:33:22 -05:00
idr: Remove idr_alloc_ext
2018-02-06 16:41:28 -05:00
Char/Misc driver patches for 4.16-rc1
2018-02-01 10:31:17 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2018-01-31 14:31:10 -08:00
- New Drivers
2018-01-29 10:59:24 -08:00
lib/scatterlist: Fix chaining support in sgl_alloc_order()
2018-01-19 12:31:03 -07:00
Merge branch 'akpm' (patches from Andrew)
2018-02-06 22:15:42 -08:00
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
locking/semaphore: Update the file path in documentation
2018-02-13 15:00:06 +01:00
seq_file: Introduce DEFINE_SHOW_ATTRIBUTE() helper macro
2018-02-07 12:50:21 +02:00
TTY/Staging driver updates for 4.16-rc1
2018-02-01 09:46:00 -08:00
More ACPI updates for v4.16-rc1
2018-02-09 09:44:25 -08:00
shmem: rename functions that are memfd-related
2018-01-31 17:18:39 -08:00
skb_array: use __ptr_ring_empty
2018-01-29 12:02:54 -05:00
skbuff: Fix comment mis-spelling.
2018-02-16 15:52:42 -05:00
lockdep: Convert some users to const
2018-01-18 11:56:49 +01:00
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-01-31 09:25:20 -08:00
x86: hibernate: fix swsusp_arch_resume() prototype
2018-02-07 12:18:23 +01:00
mm, mlock, vmscan: no more skipping pagevecs
2018-02-21 15:35:42 -08:00
mm, page_vma_mapped: Drop faulty pointer arithmetics in check_pte()
2018-01-21 17:44:47 -08:00
pci-v4.16-changes
2018-02-06 09:59:40 -08:00
locking: Introduce sync_core_before_usermode()
2018-02-05 21:34:50 +01:00
pipe, sysctl: remove pipe_proc_fn()
2018-02-06 18:32:47 -08:00
bpf: Adds field bpf_sock_ops_cb_flags to tcp_sock
2018-01-25 16:41:14 -08:00
y2038: Introduce struct __kernel_old_timeval
2018-03-19 15:23:03 +01:00
timekeeping: Add the new CLOCK_MONOTONIC_ACTIVE clock
2018-03-13 07:34:21 +01:00
tracing: Unify the "boot" and "mono" tracing clocks
2018-03-13 07:34:23 +01:00
tty: fix data race between tty_init_dev and flush of buf
2018-01-23 08:57:37 +01:00
uuid: cleanup <uapi/linux/uuid.h>
2018-02-06 18:32:44 -08:00
Revert "module: Add retpoline tag to VERMAGIC"
2018-01-24 09:00:05 -08:00
mm: remove unused pgdat_reclaimable_pages()
2018-01-31 17:18:37 -08:00
workqueue: Allow retrieval of current task's work struct
2018-02-16 22:24:25 +01:00
zswap: only save zswap header when necessary
2018-01-31 17:18:39 -08:00
