kernel_optimize_test/arch
Tony Luck 10617bbe84 [IA64] Ensure cpu0 can access per-cpu variables in early boot code
ia64 handles per-cpu variables a litle differently from other architectures
in that it maps the physical memory allocated for each cpu at a constant
virtual address (0xffffffffffff0000). This mapping is not enabled until
the architecture specific cpu_init() function is run, which causes problems
since some generic code is run before this point. In particular when
CONFIG_PRINTK_TIME is enabled, the boot cpu will trap on the access to
per-cpu memory at the first printk() call so the boot will fail without
the kernel printing anything to the console.

Fix this by allocating percpu memory for cpu0 in the kernel data section
and doing all initialization to enable percpu access in head.S before
calling any generic code.

Other cpus must take care not to access per-cpu variables too early, but
their code path from start_secondary() to cpu_init() is all in arch/ia64

Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-08-12 10:34:20 -07:00
..
alpha [PATCH] sanitize __user_walk_fd() et.al. 2008-07-26 20:53:34 -04:00
arm [ARM] 5177/1: arm/mach-sa1100/Makefile: remove CONFIG_SA1100_USB 2008-08-08 16:06:37 +01:00
avr32 avr32: Make atstk1006_nand_data definition static 2008-08-08 12:44:56 +02:00
blackfin Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 2008-07-26 13:23:17 -07:00
cris Merge branch 'linus' into core/generic-dma-coherent 2008-07-29 00:07:55 +02:00
frv FRV: Wire up new system calls 2008-08-01 13:03:49 -07:00
h8300 h8300: use generic show_mem() 2008-07-26 12:00:11 -07:00
ia64 [IA64] Ensure cpu0 can access per-cpu variables in early boot code 2008-08-12 10:34:20 -07:00
m32r m32r: use generic show_mem() 2008-07-26 12:00:11 -07:00
m68k m68k{,nommu}: Wire up new system calls 2008-08-11 10:37:34 -07:00
m68knommu m68k{,nommu}: Wire up new system calls 2008-08-11 10:37:34 -07:00
mips remove unneeded #include <linux/ide.h>'s 2008-08-05 18:17:00 +02:00
mn10300 mn10300: Fix up __bug_table handling in module loader. 2008-08-04 17:22:17 -07:00
parisc [PATCH] sanitize __user_walk_fd() et.al. 2008-07-26 20:53:34 -04:00
powerpc mm: Make generic weak get_user_pages_fast and EXPORT_GPL it 2008-08-12 17:52:53 +10:00
s390 Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2008-08-04 17:15:07 -07:00
sh [netdrvr] sh_eth: Add SH7619 support 2008-08-07 02:20:57 -04:00
sparc sparc: don't use asm/of_device.h 2008-08-07 15:33:36 -07:00
sparc64 sparc64: Fix end-of-stack checking in save_stack_trace(). 2008-08-07 23:04:37 -07:00
um uml: fix tty-related build error 2008-07-30 09:41:45 -07:00
x86 Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 2008-08-12 08:40:19 -07:00
xtensa remove unneeded #include <linux/ide.h>'s 2008-08-05 18:17:00 +02:00
.gitignore
Kconfig tracehook: CONFIG_HAVE_ARCH_TRACEHOOK 2008-07-26 12:00:09 -07:00