Dave Airlie
4b527f25a4
locking/qspinlock: Pull in asm/byteorder.h to ensure correct endianness ...
This commit is not required upstream, but is required for the 4.9.y
stable series.
Upstream commit 101110f6271c ("Kbuild: always define endianess in
kconfig.h") ensures that either __LITTLE_ENDIAN or __BIG_ENDIAN is
defined to reflect the endianness of the target CPU architecture
regardless of whether or not <asm/byteorder.h> has been #included. The
upstream definition of 'struct qspinlock' relies on this property.
Unfortunately, the 4.9.y stable series does not provide this guarantee,
so the 'spin_unlock()' routine can erroneously treat the underlying
lockword as big-endian on little-endian architectures using native
qspinlock (i.e. x86_64 without PV) if the caller has not included
<asm/byteorder.h>. This can lead to hangs such as the one in
'i915_gem_request()' reported via bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=202063
Fix the issue by ensuring that <asm/byteorder.h> is #included in
<asm/qspinlock_types.h>, where 'struct qspinlock' is defined.
Cc: <stable@vger.kernel.org> # 4.9
Signed-off-by: Dave Airlie <airlied@redhat.com>
[will: wrote commit message]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:38:36 +01:00
bitops: Do not default to __clear_bit() for __clear_bit_unlock()
2016-03-21 10:50:48 +01:00
asm-prototypes: Clear any CPP defines before declaring the functions
2017-01-12 11:39:07 +01:00
locking/atomic: Introduce inc/dec variants for the atomic_fetch_$op() API
2016-07-07 09:16:20 +02:00
locking/atomic: Remove linux/atomic.h:atomic_fetch_or()
2016-06-16 10:48:32 +02:00
locking/atomic: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()
2016-06-16 10:48:32 +02:00
locking/spinlock, arch: Update and fix spin_unlock_wait() implementations
2016-06-14 11:55:15 +02:00
asm-generic changes for 4.6
2016-03-24 23:13:48 -07:00
ipv4: Update parameters for csum_tcpudp_magic to their original types
2016-03-13 23:55:13 -04:00
sched/cputime: Count actually elapsed irq & softirq time
2016-07-14 10:42:34 +02:00
Revert "default exported asm symbols to zero"
2016-12-07 08:39:00 -08:00
asm-generic: Fix local variable shadow in __set_fixmap_offset
2016-02-16 15:10:44 +00:00
futex: Remove duplicated code and fix undefined behaviour
2018-05-19 10:27:00 +02:00
gpio: allow setting ARCH_NR_GPIOS from Kconfig
2016-02-19 00:22:54 +01:00
asm-generic/io.h: add io{read,write}64 accessors
2016-05-31 16:41:50 +08:00
asm-generic/io.h: add io{read,write}64 accessors
2016-05-31 16:41:50 +08:00
mm: add PHYS_PFN, use it in __phys_to_pfn()
2016-01-14 16:00:49 -08:00
mm/core, x86/mm/pkeys: Differentiate instruction fetches
2016-02-18 19:46:29 +01:00
locking/mutex: Optimize mutex_trylock() fast-path
2016-06-08 15:17:01 +02:00
locking/mutex: Optimize mutex_trylock() fast-path
2016-06-08 15:17:01 +02:00
asm-generic: page.h: Remove useless get_user_page and free_user_page
2016-02-26 15:24:55 +01:00
percpu: make this_cpu_generic_read() atomic w.r.t. interrupts
2017-10-12 11:51:23 +02:00
ioremap: Update pgtable free interfaces with addr
2018-08-17 20:59:29 +02:00
sched/preempt: Fix preempt_count manipulations
2016-05-17 12:24:21 +02:00
locking/qrwlock: Fix write unlock bug on big endian systems
2016-08-10 14:13:27 +02:00
locking/qspinlock: Use atomic_sub_return_release() in queued_spin_unlock()
2016-06-08 15:17:01 +02:00
locking/qspinlock: Pull in asm/byteorder.h to ensure correct endianness
2019-01-26 09:38:36 +01:00
locking/rwsem: Remove rwsem_atomic_add() and rwsem_atomic_update()
2016-06-08 15:16:59 +02:00
seccomp: Get compat syscalls from asm-generic header
2016-05-13 14:02:00 +02:00
mm: kmemleak: scan .data.ro_after_init
2016-11-11 08:12:37 -08:00
SIGNAL: Move generic copy_siginfo() to signal.h
2016-05-13 14:02:10 +02:00
mm/mmu_gather: track page size with mmu gather and force flush if page size change
2016-07-26 16:19:19 -07:00
cpumask: fix spurious cpumask_of_node() on non-NUMA multi-node configs
2017-09-07 08:35:40 +02:00
exceptions: detritus removal
2016-09-27 21:15:14 -04:00
earlycon: Use a pointer table to fix __earlycon_table stride
2018-05-01 15:13:09 -07:00
4b527f25a4