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linux/arch/sparc/kernel
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Tejun Heo 0415b00d17 percpu: Always align percpu output section to PAGE_SIZE 
Percpu allocator honors alignment request upto PAGE_SIZE and both the
percpu addresses in the percpu address space and the translated kernel
addresses should be aligned accordingly.  The calculation of the
former depends on the alignment of percpu output section in the kernel
image.

The linker script macros PERCPU_VADDR() and PERCPU() are used to
define this output section and the latter takes @align parameter.
Several architectures are using @align smaller than PAGE_SIZE breaking
percpu memory alignment.

This patch removes @align parameter from PERCPU(), renames it to
PERCPU_SECTION() and makes it always align to PAGE_SIZE.  While at it,
add PCPU_SETUP_BUG_ON() checks such that alignment problems are
reliably detected and remove percpu alignment comment recently added
in workqueue.c as the condition would trigger BUG way before reaching
there.

For um, this patch raises the alignment of percpu area.  As the area
is in .init, there shouldn't be any noticeable difference.

This problem was discovered by David Howells while debugging boot
failure on mn10300.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Cc: uclinux-dist-devel@blackfin.uclinux.org
Cc: David Howells <dhowells@redhat.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: user-mode-linux-devel@lists.sourceforge.net
2011-03-24 18:50:09 +01:00
..
.gitignore
apc.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
asm-offsets.c
audit.c
auxio_32.c sparc: explicitly cast negative phandle checks to s32 2011-01-03 20:02:06 -07:00
auxio_64.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
btext.c of/sparc: convert various prom_* functions to use phandle 2010-10-09 02:33:34 -06:00
central.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
cherrs.S
chmc.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
compat_audit.c
cpu.c sparc32/leon: FPU-FSR only available when FPU present 2011-03-16 18:19:05 -07:00
cpumap.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
cpumap.h sparc64: fix and optimize irq distribution 2009-06-16 04:56:28 -07:00
devices.c of/sparc: convert various prom_* functions to use phandle 2010-10-09 02:33:34 -06:00
dma.c sparc: Add CONFIG_DMA_API_DEBUG support 2009-08-10 09:35:00 +02:00
ds.c sparc64: Defer cpu_data() setup until end of per-cpu data initialization. 2009-06-16 04:56:22 -07:00
dtlb_miss.S
dtlb_prot.S
ebus.c
entry.h sparc64: rename virt_irq => irq - I 2011-03-16 18:19:03 -07:00
entry.S sparc64: Add syscall tracepoint support. 2009-12-11 00:44:47 -08:00
etrap_32.S
etrap_64.S
fpu_traps.S
ftrace.c sparc64: Add function graph tracer support. 2010-04-12 22:37:26 -07:00
getsetcc.S
head_32.S sparc: use _start for the start entry (like 64 bit does) 2011-01-04 19:25:04 -08:00
head_64.S sparc64: Store per-cpu offset in trap_block[] 2009-06-16 04:56:11 -07:00
helpers.S sparc64: Fix perf_arch_get_caller_regs(). 2010-08-08 22:07:36 -07:00
hvapi.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
hvcalls.S
hvtramp.S
idprom.c sparc,leon: Introduce the sparc-leon CPU type. 2009-08-17 18:32:10 -07:00
init_task.c Use new __init_task_data macro in arch init_task.c files. 2009-09-21 06:27:08 +02:00
iommu.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
iommu_common.h
ioport.c sparc: Fix sbus_alloc_coherent error handling. 2011-03-16 18:18:59 -07:00
irq.h sparc32,sun4m: percpu and global register definitions moved to irq.h 2011-03-16 18:19:14 -07:00
irq_32.c sparc32: introduce build_device_irq 2011-03-16 18:19:14 -07:00
irq_64.c sparc64: rename virt_irq => irq - I 2011-03-16 18:19:03 -07:00
itlb_miss.S
ivec.S
jump_label.c jump label: Add sparc64 support 2010-09-22 16:35:09 -04:00
kernel.h sparc32: fix build with leon or floppy enabled 2011-03-16 18:19:13 -07:00
kgdb_32.c kgdb,sparc: Add in kgdb_arch_set_pc for sparc 2010-05-20 21:04:19 -05:00
kgdb_64.c kgdb,sparc: Add in kgdb_arch_set_pc for sparc 2010-05-20 21:04:19 -05:00
kprobes.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
kstack.h sparc64: Run NMIs on the hardirq stack. 2010-04-14 02:04:29 -07:00
ktlb.S sparc64: Increase vmalloc size to fix percpu regressions. 2009-09-28 14:39:58 -07:00
ldc.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
led.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
leon_kernel.c sparc32: introduce sparc_irq_config 2011-03-16 18:19:13 -07:00
leon_pmc.c SPARC/LEON: power down instruction different of different LEONs 2011-03-16 18:19:04 -07:00
leon_smp.c sparc32: fix build with leon or floppy enabled 2011-03-16 18:19:13 -07:00
Makefile sparc32: remove tick14.c 2011-03-16 18:19:08 -07:00
mdesc.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
misctrap.S
module.c mm: unify module_alloc code for vmalloc 2011-01-13 17:32:34 -08:00
muldiv.c
nmi.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
of_device_32.c sparc32: introduce build_device_irq 2011-03-16 18:19:14 -07:00
of_device_64.c sparc: remove references to of_device and to_of_device 2010-07-24 09:58:22 -06:00
of_device_common.c sparc: Implement of_iomap(). 2011-03-18 15:47:26 -07:00
of_device_common.h sparc: move of_device common code to of_device_common 2009-06-16 04:56:49 -07:00
pci.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
pci_common.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
pci_fire.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
pci_impl.h sparc64: rename virt_irq => irq - II 2011-03-16 18:19:03 -07:00
pci_msi.c sparc64: rename virt_irq => irq - II 2011-03-16 18:19:03 -07:00
pci_psycho.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
pci_sabre.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
pci_schizo.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
pci_sun4v.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
pci_sun4v.h
pci_sun4v_asm.S
pcic.c sparc: Switch do_timer() to xtime_update() 2011-01-31 14:55:46 +01:00
pcr.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
perf_event.c perf: Dynamic pmu types 2010-12-16 11:36:43 +01:00
pmc.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
power.c dt/sparc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
process_32.c Make do_execve() take a const filename pointer 2010-08-17 18:07:43 -07:00
process_64.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-08-28 13:55:31 -07:00
prom.h of/promtree: make drivers/of/pdt.c no longer sparc-only 2010-10-10 21:53:30 -06:00
prom_32.c SPARC/LEON: avoid AMBAPP name duplicates in openprom fs when REG is missing 2011-01-04 11:16:37 -08:00
prom_64.c Merge commit 'v2.6.35-rc6' into devicetree/next 2010-07-24 09:49:13 -06:00
prom_common.c of/promtree: no longer call prom_ functions directly; use an ops structure 2010-10-12 21:57:53 -06:00
prom_irqtrans.c sparc64: rename virt_irq => irq - II 2011-03-16 18:19:03 -07:00
psycho_common.c sparc: remove references to of_device and to_of_device 2010-07-24 09:58:22 -06:00
psycho_common.h sparc: remove references to of_device and to_of_device 2010-07-24 09:58:22 -06:00
ptrace_32.c ptrace: cleanup arch_ptrace() on sparc 2010-10-27 18:03:12 -07:00
ptrace_64.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
reboot.c
rtrap_32.S sparc: keep calling do_signal() as long as pending signals remain 2010-10-26 08:59:55 -07:00
rtrap_64.S sparc: keep calling do_signal() as long as pending signals remain 2010-10-26 08:59:55 -07:00
sbus.c sparc: remove references to of_device and to_of_device 2010-07-24 09:58:22 -06:00
setup_32.c sparc32: add irq + smp declarations to headers 2011-03-16 18:19:08 -07:00
setup_64.c of/sparc: convert various prom_* functions to use phandle 2010-10-09 02:33:34 -06:00
signal32.c sparc: Prevent no-handler signal syscall restart recursion. 2010-09-21 22:30:13 -07:00
signal_32.c sparc: Prevent no-handler signal syscall restart recursion. 2010-09-21 22:30:13 -07:00
signal_64.c sparc: Prevent no-handler signal syscall restart recursion. 2010-09-21 22:30:13 -07:00
smp_32.c sparc,leon: Sparc-Leon SMP support 2009-11-02 04:19:42 -08:00
smp_64.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
sparc_ksyms_32.c
sparc_ksyms_64.c sparc64: don't export static inline pci_ functions 2009-12-15 16:28:13 +10:30
spiterrs.S
sstate.c
stacktrace.c sparc64: Fix stack dumping and tracing when function graph is enabled. 2010-04-21 03:08:11 -07:00
starfire.c sparc: explicitly cast negative phandle checks to s32 2011-01-03 20:02:06 -07:00
sun4c_irq.c sparc32: introduce sparc_irq_config 2011-03-16 18:19:13 -07:00
sun4d_irq.c sparc32: introduce build_device_irq 2011-03-16 18:19:14 -07:00
sun4d_smp.c sparc32,sun4d: irq, smp files cleanup 2011-03-16 18:19:10 -07:00
sun4m_irq.c sparc32,sun4m: percpu and global register definitions moved to irq.h 2011-03-16 18:19:14 -07:00
sun4m_smp.c sparc32,sun4m: irq, smp files cleanup 2011-03-16 18:19:09 -07:00
sun4v_ivec.S
sun4v_tlb_miss.S
sys32.S sparc: Hook up new fanotify and prlimit64 syscalls. 2010-08-16 15:04:29 -07:00
sys_sparc32.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
sys_sparc_32.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
sys_sparc_64.c sparc64: Sharpen address space randomization calculations. 2011-03-16 18:19:12 -07:00
syscalls.S sparc64: Kill off old sys_perfctr system call and state. 2010-03-03 08:08:49 -08:00
sysfs.c arch/sparc/kernel: Use set_cpus_allowed_ptr 2010-03-27 21:11:56 -07:00
systbls.h improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
systbls_32.S sparc: Add {open_by,name_to}_handle_at and clock_adjtime syscalls. 2011-03-18 21:50:29 -07:00
systbls_64.S sparc: Add {open_by,name_to}_handle_at and clock_adjtime syscalls. 2011-03-18 21:50:29 -07:00
tadpole.c of/sparc: convert various prom_* functions to use phandle 2010-10-09 02:33:34 -06:00
time_32.c sparc32: introduce sparc_irq_config 2011-03-16 18:19:13 -07:00
time_64.c sparc: convert to clocksource_register_hz/khz 2011-03-16 18:19:12 -07:00
trampoline_32.S sparc,leon: Sparc-Leon SMP support 2009-11-02 04:19:42 -08:00
trampoline_64.S
traps_32.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
traps_64.c sparc64: Fix build errors with gcc-4.6.0 2011-03-16 18:19:15 -07:00
tsb.S sparc64: Fix sun4u execute bit check in TSB I-TLB load. 2010-02-19 15:19:52 -08:00
ttable.S sparc64: fix the build error due to smp_kgdb_capture_client() 2010-06-25 11:17:57 -07:00
una_asm_32.S sparc32: unaligned memory access (MNA) trap handler bug 2011-02-01 12:39:59 -08:00
una_asm_64.S sparc: Fix .size directive for do_int_load 2011-03-16 18:19:15 -07:00
unaligned_32.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
unaligned_64.c sparc64: Use correct pt_regs in decode_access_size() error paths. 2010-04-19 13:46:48 -07:00
us2e_cpufreq.c arch/sparc/kernel: Use set_cpus_allowed_ptr 2010-03-27 21:11:56 -07:00
us3_cpufreq.c arch/sparc/kernel: Use set_cpus_allowed_ptr 2010-03-27 21:11:56 -07:00
utrap.S
vio.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
viohs.c
visemul.c sparc: Add alignment and emulation fault perf events. 2009-12-11 01:07:53 -08:00
vmlinux.lds.S percpu: Always align percpu output section to PAGE_SIZE 2011-03-24 18:50:09 +01:00
windows.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
winfixup.S
wof.S
wuf.S