tmp_suning_uos_patched/arch/tile/kernel
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
..
asm-offsets.c arch/tile: core support for Tilera 32-bit chips. 2010-06-04 17:11:18 -04:00
backtrace.c arch/tile: support new info op generated by compiler 2010-10-15 15:39:25 -04:00
compat_signal.c arch/tile: handle rt_sigreturn() more cleanly 2010-12-17 16:59:29 -05:00
compat.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
early_printk.c arch/tile: bomb raw_local_irq_ to arch_local_irq_ 2010-11-01 15:30:42 -04:00
entry.S arch/tile: use a cleaner technique to enable interrupt for cpu_idle() 2011-03-01 16:20:48 -05:00
hardwall.c arch/tile: mark "hardwall" device as non-seekable 2010-11-01 15:31:42 -04:00
head_32.S arch/tile: support newer binutils assembler shift semantics 2011-03-17 14:32:06 -04:00
hvglue.lds arch/tile: Enable more sophisticated IRQ model for 32-bit chips. 2010-07-06 13:34:01 -04:00
init_task.c arch/tile: core support for Tilera 32-bit chips. 2010-06-04 17:11:18 -04:00
intvec_32.S arch/tile: support 4KB page size as well as 64KB 2011-03-10 13:17:53 -05:00
irq.c tile: Use proper accessor functions in show_interrupt() 2011-02-23 16:07:34 -05:00
machine_kexec.c arch/tile: support 4KB page size as well as 64KB 2011-03-10 13:17:53 -05:00
Makefile pci root complex: support for tile architecture 2010-11-24 13:13:49 -05:00
messaging.c arch/tile: bomb raw_local_irq_ to arch_local_irq_ 2010-11-01 15:30:42 -04:00
module.c arch/tile: Miscellaneous cleanup changes. 2010-07-06 13:41:51 -04:00
pci-dma.c arch/tile: support 4KB page size as well as 64KB 2011-03-10 13:17:53 -05:00
pci.c pci root complex: support for tile architecture 2010-11-24 13:13:49 -05:00
proc.c arch: tile: kernel/proc.c Removed duplicated #include 2010-08-13 08:10:16 -04:00
process.c mm: NUMA aware alloc_thread_info_node() 2011-03-22 17:44:01 -07:00
ptrace.c arch/tile: don't allow user code to set the PL via ptrace or signal return 2010-11-01 15:31:17 -04:00
reboot.c arch/tile: bomb raw_local_irq_ to arch_local_irq_ 2010-11-01 15:30:42 -04:00
regs_32.S arch/tile: parameterize system PLs to support KVM port 2010-10-15 15:38:09 -04:00
relocate_kernel.S arch/tile: core support for Tilera 32-bit chips. 2010-06-04 17:11:18 -04:00
setup.c arch/tile: support 4KB page size as well as 64KB 2011-03-10 13:17:53 -05:00
signal.c arch/tile: handle rt_sigreturn() more cleanly 2010-12-17 16:59:29 -05:00
single_step.c arch/tile: bug fix: exec'ed task thought it was still single-stepping 2011-03-01 16:19:58 -05:00
smp.c arch/tile: warn and retry if an IPI is not accepted by the target cpu 2011-03-01 16:20:16 -05:00
smpboot.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
stack.c arch/tile: fix two bugs in the backtracer code 2011-03-01 16:21:00 -05:00
sys.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
tile-desc_32.c arch/tile: Shrink the tile-opcode files considerably. 2010-07-06 13:40:56 -04:00
time.c arch/tile: fix __ndelay etc to work better 2011-03-01 16:20:04 -05:00
tlb.c arch/tile: core support for Tilera 32-bit chips. 2010-06-04 17:11:18 -04:00
traps.c arch/tile: enable single-step support for TILE-Gx 2010-10-15 15:38:26 -04:00
vmlinux.lds.S percpu: Always align percpu output section to PAGE_SIZE 2011-03-24 18:50:09 +01:00