The patch titled
kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds
has been added to the -mm tree. Its filename is
kernel-kprobesc-dont-pad-kretprobe_table_locks-on-uniprocessor-builds.patch
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See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
We only need the cacheline padding on SMP kernels. Saves 6k:
text data bss dec hex filename
5713 388 2632 8733 221d kernel/kprobes.o
5713 388 8840 14941 3a5d kernel/kprobes.o
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Ananth N Mavinakayanahalli <ananth@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kprobes.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/kprobes.c~kernel-kprobesc-dont-pad-kretprobe_table_locks-on-uniprocessor-builds kernel/kprobes.c
--- a/kernel/kprobes.c~kernel-kprobesc-dont-pad-kretprobe_table_locks-on-uniprocessor-builds
+++ a/kernel/kprobes.c
@@ -72,7 +72,7 @@ static bool kprobe_enabled;
DEFINE_MUTEX(kprobe_mutex); /* Protects kprobe_table */
static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL;
static struct {
- spinlock_t lock ____cacheline_aligned;
+ spinlock_t lock ____cacheline_aligned_in_smp;
} kretprobe_table_locks[KPROBE_TABLE_SIZE];
static spinlock_t *kretprobe_table_lock_ptr(unsigned long hash)
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
autofs4-collect-version-check-return.patch
maintainers-make-ioat-easier-to-find.patch
binfmtsh-include-listh-fix.patch
mm-remove-the-might_sleep-from-lock_page.patch
linux-next.patch
next-remove-localversion.patch
arch-x86-kernel-setupc-omit-dmi_low_memory_corruption-when-it-is-unneeded.patch
tick-schedc-suppress-needless-timer-reprogramming.patch
linux-timexh-cleanup-for-userspace.patch
drivers-input-touchscreen-ucb1400_tsc-needs-gpio.patch
input-ad7879-fix-workaroud-build-error-reported-by-andrew-morton.patch
pci-uninline-pci_ioremap_bar.patch
pcie-add-option-to-passively-listen-for-pcie-hotplug-events-checkpatch-fixes.patch
cpusets-update-mems-allowed-in-page-allocator-fix.patch
remove-ratelimt.patch
doc-add-printk-formatstxt-fix.patch
kernel-kprobesc-dont-pad-kretprobe_table_locks-on-uniprocessor-builds.patch
bdi-register-sysfs-bdi-device-only-once-per-queue-fix.patch
scsi-dpt_i2o-is-bust-on-ia64.patch
alsa-fix-snd_bug_on-and-friends.patch
mm-invoke-oom-killer-from-page-fault-fix.patch
mm-invoke-oom-killer-from-page-fault-fix-fix-2.patch
mm-write_cache_pages-more-terminate-quickly.patch
init-properly-placing-noinline-keyword.patch
align-avoid-evaluating-its-argument-twice.patch
spi_gpio-driver-cleanups.patch
rtc-rtc-wm8350-add-support-for-wm8350-rtc.patch
rtc-basic-implementation-of-epson-rx-8581-i2c-real-time-clock-fix.patch
quota-permit-separately-enabling-quota-accounting-and-enforcing-limits-fix.patch
quota-move-quotaio_vh-from-include-linux-to-fs-fix.patch
quota-move-quotaio_vh-from-include-linux-to-fs-fix-2.patch
quota-convert-union-in-mem_dqinfo-to-a-pointer-cleanup.patch
quota-support-64-bit-quota-format-fix.patch
quota-support-64-bit-quota-format-fix-2.patch
memcg-introduce-charge-commit-cancel-style-of-functions-fix.patch
edac-struct-device-replace-bus_id-with-dev_name-dev_set_name-checkpatch-fixes.patch
edac-x38-use-the-architectures-readq-function-fix.patch
w1-export-w1_read_8-function-checkpatch-fixes.patch
filesystem-freeze-implement-generic-freeze-feature-fix.patch
nilfs2-inode-operations-fix.patch
nilfs2-pathname-operations-fix.patch
nilfs2-super-block-operations-fix.patch
reiser4.patch
reiser4-tree_lock-fixes.patch
reiser4-tree_lock-fixes-fix.patch
reiser4-semaphore-fix.patch
slb-drop-kmem-cache-argument-from-constructor-reiser4.patch
reiser4-suid.patch
reiser4-track-upstream-changes.patch
reiser4-broke.patch
nr_blockdev_pages-in_interrupt-warning.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
shrink_slab-handle-bad-shrinkers.patch
getblk-handle-2tb-devices.patch
getblk-handle-2tb-devices-fix.patch
undeprecate-pci_find_device.patch
notify_change-callers-must-hold-i_mutex.patch
profile-likely-unlikely-macros.patch
drivers-net-bonding-bond_sysfsc-suppress-uninitialized-var-warning.patch
w1-build-fix.patch
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