The patch titled
lguest-the-host-code-vs-futex-new-private-futexes
has been added to the -mm tree. Its filename is
lguest-the-host-code-vs-futex-new-private-futexes.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: lguest-the-host-code-vs-futex-new-private-futexes
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Eric Dumazet <dada1@xxxxxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/lguest/io.c | 21 ++++++++++++---------
1 files changed, 12 insertions(+), 9 deletions(-)
diff -puN drivers/lguest/io.c~lguest-the-host-code-vs-futex-new-private-futexes drivers/lguest/io.c
--- a/drivers/lguest/io.c~lguest-the-host-code-vs-futex-new-private-futexes
+++ a/drivers/lguest/io.c
@@ -102,13 +102,14 @@ int bind_dma(struct lguest *lg,
unsigned int i;
int ret = 0;
union futex_key key;
+ struct rw_semaphore *fshared = ¤t->mm->mmap_sem;
if (interrupt >= LGUEST_IRQS)
return 0;
mutex_lock(&lguest_lock);
- down_read(¤t->mm->mmap_sem);
- if (get_futex_key((u32 __user *)ukey, &key) != 0) {
+ down_read(fshared);
+ if (get_futex_key((u32 __user *)ukey, fshared, &key) != 0) {
kill_guest(lg, "bad dma key %#lx", ukey);
goto unlock;
}
@@ -134,7 +135,7 @@ int bind_dma(struct lguest *lg,
}
drop_futex_key_refs(&key);
unlock:
- up_read(¤t->mm->mmap_sem);
+ up_read(fshared);
mutex_unlock(&lguest_lock);
return ret;
}
@@ -307,11 +308,12 @@ void send_dma(struct lguest *lg, unsigne
{
union futex_key key;
int empty = 0;
+ struct rw_semaphore *fshared = ¤t->mm->mmap_sem;
again:
mutex_lock(&lguest_lock);
- down_read(¤t->mm->mmap_sem);
- if (get_futex_key((u32 __user *)ukey, &key) != 0) {
+ down_read(fshared);
+ if (get_futex_key((u32 __user *)ukey, fshared, &key) != 0) {
kill_guest(lg, "bad sending DMA key");
goto unlock;
}
@@ -342,7 +344,7 @@ again:
lg->pending_key = ukey;
}
unlock:
- up_read(¤t->mm->mmap_sem);
+ up_read(fshared);
mutex_unlock(&lguest_lock);
}
@@ -382,10 +384,11 @@ unsigned long get_dma_buffer(struct lgue
unsigned long ret = 0;
union futex_key key;
struct lguest_dma_info *i;
+ struct rw_semaphore *fshared = ¤t->mm->mmap_sem;
mutex_lock(&lguest_lock);
- down_read(¤t->mm->mmap_sem);
- if (get_futex_key((u32 __user *)ukey, &key) != 0) {
+ down_read(fshared);
+ if (get_futex_key((u32 __user *)ukey, fshared, &key) != 0) {
kill_guest(lg, "bad registered DMA buffer");
goto unlock;
}
@@ -405,7 +408,7 @@ unsigned long get_dma_buffer(struct lgue
}
}
unlock:
- up_read(¤t->mm->mmap_sem);
+ up_read(fshared);
mutex_unlock(&lguest_lock);
return ret;
}
_
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origin.patch
extend-print_symbol-capability.patch
add-kvasprintf.patch
zlib-backout.patch
slab-introduce-krealloc.patch
git-acpi.patch
git-alsa.patch
git-alsa-fixup.patch
git-agpgart.patch
git-arm.patch
git-avr32.patch
revert-gregkh-driver-remove-struct-subsystem-as-it-is-no-longer-needed.patch
ida-implement-idr-based-id-allocator-fix.patch
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even-more-fix-gregkh-driver-sysfs-kill-unnecessary-attribute-owner.patch
even-even-more-fix-gregkh-driver-sysfs-kill-unnecessary-attribute-owner.patch
git-drm.patch
git-dvb.patch
git-dvb-vs-gregkh-driver-sysfs-kill-unnecessary-attribute-owner.patch
git-gfs2-nmw.patch
git-ieee1394.patch
sbp2-include-fixes.patch
ieee1394-iso-needs-schedh.patch
git-input.patch
git-jfs.patch
git-kvm.patch
revert-rm-pointless-dmaengine-exports.patch
git-md-accel-fix.patch
git-mmc-build-fix.patch
ne-add-platform_driver-fix.patch
git-e1000.patch
git-e1000-fixup-2.patch
input-rfkill-add-support-for-input-key-to-control-wireless-radio.patch
git-ocfs2.patch
git-parisc.patch
git-r8169.patch
rm9000-serial-driver.patch
fix-gregkh-pci-pci-remove-the-broken-pci_multithread_probe-option.patch
git-pciseg.patch
git-s390-vs-gregkh-driver-sysfs-kill-unnecessary-attribute-owner.patch
s390-net-lcs-convert-to-the-kthread-api.patch
git-sh-fixup.patch
git-scsi-misc.patch
scsi-fix-config_scsi_wait_scan=m.patch
git-block-fixup.patch
git-unionfs.patch
i386-map-enough-initial-memory-to-create-lowmem-mappings-fix.patch
i386-__inquire_remote_apic-printk-warning-fix.patch
xfs-clean-up-shrinker-games.patch
add-apply_to_page_range-which-applies-a-function-to-a-pte-range-fix.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-high-memory-that-may-be-migrated.patch
bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks.patch
mm-merge-populate-and-nopage-into-fault-fixes-nonlinear.patch
mm-merge-nopfn-into-fault.patch
smaps-add-clear_refs-file-to-clear-reference.patch
maps2-move-the-page-walker-code-to-lib.patch
maps2-add-proc-pid-pagemap-interface.patch
mm-move-common-segment-checks-to-separate-helper-function-v7.patch
slab-mark-set_up_list3s-__init.patch
slub-core.patch
mm-optimize-kill_bdev.patch
lazy-freeing-of-memory-through-madv_free.patch
lazy-freeing-of-memory-through-madv_free-vs-mm-madvise-avoid-exclusive-mmap_sem.patch
srmcons-fix-kmallocgfp_kernel-inside-spinlock.patch
uml-driver-formatting-fixes-fix.patch
cache-pipe-buf-page-address-for-non-highmem-arch.patch
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fix-cycladesh-for-x86_64-and-probably-others.patch
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enlarge-console-name.patch
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fix-sscanf-%n-match-at-end-of-input-string.patch
parport-dev-driver-model-support.patch
add-support-for-deferrable-timers-respun.patch
linux-sysdevh-needs-to-include-linux-moduleh.patch
time-smp-friendly-alignment-of-struct-clocksource.patch
move-timekeeping-code-to-timekeepingc.patch
fix-kevents-childs-priority-greediness.patch
display-all-possible-partitions-when-the-root-filesystem-failed-to-mount.patch
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dtlk-fix-error-checks-in-module_init.patch
document-spin_lock_unlocked-rw_lock_unlocked-deprecation.patch
upper-32-bits.patch
driver-for-the-maxim-ds1wm-a-1-wire-bus-master-asic-core.patch
define-and-use-new-eventscpu_lock_acquire-and-cpu_lock_release.patch
call-cpu_chain-with-cpu_down_failed-if-cpu_down_prepare-failed-vs-reduce-size-of-task_struct-on-64-bit-machines.patch
kthread-dont-depend-on-work-queues-take-2.patch
fix-kthread_create-vs-freezer-theoretical-race.patch
speedup-divides-by-cpu_power-in-scheduler.patch
utimensat-implementation.patch
revert-rtc-add-rtc_merge_alarm.patch
declare-struct-ktime.patch
make-futex_wait-use-an-hrtimer-for-timeout.patch
kprobes-the-on-off-knob-thru-debugfs-updated.patch
atomich-add-atomic64-cmpxchg-xchg-and-add_unless-to-powerpc.patch
local_t-powerpc-extension.patch
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signal-timer-event-fds-v9-signalfd-core.patch
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revoke-core-code-fix-shared-mapping-revoke.patch
revoke-wire-up-i386-system-calls.patch
x86-serial-convert-legacy-com-ports-to-platform-devices.patch
lguest-vs-x86_64-mm-use-per-cpu-variables-for-gdt-pda.patch
lguest-the-host-code-vs-x86_64-mm-i386-separate-hardware-defined-tss-from-linux-additions.patch
lguest-the-host-code-vs-futex-new-private-futexes.patch
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fs-convert-core-functions-to-zero_user_page-fix-2.patch
ntfs-use-zero_user_page-fix.patch
reiser4-slab-allocators-remove-slab_debug_initial-flag.patch
fbdev-hecuba-framebuffer-driver.patch
vt-add-color-support-to-the-underline-and-italic-attributes-fix.patch
sm501fb-printk-warning-fixes.patch
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integrity-evm-as-an-integrity-service-provider-tidy.patch
integrity-evm-as-an-integrity-service-provider-tidy-fix.patch
integrity-evm-as-an-integrity-service-provider-tidy-fix-2.patch
integrity-ima-integrity_measure-support-tidy.patch
integrity-ima-integrity_measure-support-fix.patch
integrity-ima-integrity_measure-support-fix-2.patch
integrity-tpm-internal-kernel-interface-tidy.patch
git-gccbug-fixup.patch
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