linux/arch/i386
Zwane Mwaikambo 4ad8d38342 [PATCH] i386 boottime for_each_cpu broken
for_each_cpu walks through all processors in cpu_possible_map, which is
defined as cpu_callout_map on i386 and isn't initialised until all
processors have been booted. This breaks things which do for_each_cpu
iterations early during boot. So, define cpu_possible_map as a bitmap with
NR_CPUS bits populated. This was triggered by a patch i'm working on which
does alloc_percpu before bringing up secondary processors.

From: Alexander Nyberg <alexn@telia.com>

i386-boottime-for_each_cpu-broken.patch
i386-boottime-for_each_cpu-broken-fix.patch

The SMP version of __alloc_percpu checks the cpu_possible_map before
allocating memory for a certain cpu.  With the above patches the BSP cpuid
is never set in cpu_possible_map which breaks CONFIG_SMP on uniprocessor
machines (as soon as someone tries to dereference something allocated via
__alloc_percpu, which in fact is never allocated since the cpu is not set
in cpu_possible_map).

Signed-off-by: Zwane Mwaikambo <zwane@arm.linux.org.uk>
Signed-off-by: Alexander Nyberg <alexn@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-05 00:06:13 -07:00
..
boot [PATCH] coverity: i386: build.c: negative return to unsigned fix 2005-06-28 21:20:33 -07:00
crypto [PATCH] arch/i386/crypto/aes.c: fix sparse warnings 2005-06-25 16:24:59 -07:00
kernel [PATCH] i386 boottime for_each_cpu broken 2005-09-05 00:06:13 -07:00
lib [PATCH] Remove i386_ksyms.c, almost. 2005-06-23 09:45:11 -07:00
mach-default [PATCH] x86_64: CPU hotplug support 2005-06-25 16:24:30 -07:00
mach-es7000 [PATCH] ES7000 platform update (i386) 2005-09-05 00:06:10 -07:00
mach-generic [PATCH] x86: sutomatically enable bigsmp when we have more than 8 CPUs 2005-09-05 00:06:10 -07:00
mach-visws [PATCH] visws: linkage fix 2005-08-07 10:00:38 -07:00
mach-voyager [PATCH] i386 boottime for_each_cpu broken 2005-09-05 00:06:13 -07:00
math-emu [PATCH] i386: inline assembler: cleanup and encapsulate descriptor and task register management 2005-09-05 00:06:11 -07:00
mm [PATCH] i386: encapsulate copying of pgd entries 2005-09-05 00:06:13 -07:00
oprofile [PATCH] xen: x86: Rename usermode macro 2005-06-23 09:45:14 -07:00
pci [PATCH] x86: pci_assign_unassigned_resources() update 2005-08-30 11:14:48 -07:00
power [PATCH] x86: remove redundant TSS clearing 2005-09-05 00:06:13 -07:00
defconfig [PATCH] swsusp: kill config_pm_disk 2005-06-25 16:24:32 -07:00
Kconfig [PATCH] sparsemem extreme implementation 2005-09-05 00:05:38 -07:00
Kconfig.debug [PATCH] i386: add missing Kconfig help text 2005-07-27 16:25:58 -07:00
Makefile [PATCH] biarch compiler support for i386 2005-06-23 09:45:07 -07:00