The patch titled
include/linux/kernel.h:roundup(): work around a gcc-3.3 miscompile
has been removed from the -mm tree. Its filename was
include-linux-kernelh-roundup-work-around-a-gcc-33-miscompile.patch
This patch was dropped because an alternative patch was merged
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: include/linux/kernel.h:roundup(): work around a gcc-3.3 miscompile
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
gcc-3.3.5 (at least) is failing to optimise away the divide when `y' is a
constant 64-bit power-of-two value - it emits a call to __divdi3().
It turns out that defining `y' as const prevents this.
Reported-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Tested-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Cc: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
Cc: Eric Paris <eparis@xxxxxxxxxx>
Cc: James Morris <jmorris@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/kernel.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN include/linux/kernel.h~include-linux-kernelh-roundup-work-around-a-gcc-33-miscompile include/linux/kernel.h
--- a/include/linux/kernel.h~include-linux-kernelh-roundup-work-around-a-gcc-33-miscompile
+++ a/include/linux/kernel.h
@@ -58,9 +58,11 @@ extern const char linux_proc_banner[];
#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+
+/* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
#define roundup(x, y) ( \
{ \
- typeof(y) __y = y; \
+ const typeof(y) __y = y; \
(((x) + (__y - 1)) / __y) * __y; \
} \
)
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
hpet-factor-timer-allocate-from-open.patch
atomic-add-atomic_inc_not_zero_hint-checkpatch-fixes.patch
linux-next.patch
linux-next-git-rejects.patch
next-remove-localversion.patch
arch-x86-kernel-entry_64s-fix-build-with-gas-2161.patch
arch-x86-kernel-entry_32s-i386-too.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
drivers-misc-isl29020c-dont-ignore-the-i2c_smbus_read_byte_data-return-value.patch
drivers-misc-bh1770glcc-error-handling-in-bh1770_power_state_store.patch
mm-vmap-area-cache.patch
arch-x86-kernel-apic-io_apicc-fix-warning.patch
drivers-gpu-drm-radeon-atomc-fix-warning.patch
irq-use-per_cpu-kstat_irqs-checkpatch-fixes.patch
leds-route-kbd-leds-through-the-generic-leds-layer.patch
leds-add-led-trigger-for-input-subsystem-led-events.patch
backlight-add-low-threshold-to-pwm-backlight.patch
atmel_serial-fix-rts-high-after-initialization-in-rs485-mode-fix.patch
drivers-message-fusion-mptsasc-fix-warning.patch
mm.patch
mm-vmstat-use-a-single-setter-function-and-callback-for-adjusting-percpu-thresholds-fix.patch
sync_inode_metadata-fix-comment.patch
frv-duplicate-output_buffer-of-e03-checkpatch-fixes.patch
memcg-document-cgroup-dirty-memory-interfaces-fix.patch
fs-proc-basec-kernel-latencytopc-convert-sprintf_symbol-to-%ps-checkpatch-fixes.patch
pps-add-async-pps-event-handler-fix.patch
memstick-add-driver-for-ricoh-r5c592-card-reader-fix.patch
journal_add_journal_head-debug.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
getblk-handle-2tb-devices.patch
memblock-add-input-size-checking-to-memblock_find_region.patch
memblock-add-input-size-checking-to-memblock_find_region-fix.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
