linux-sg2042/arch/ppc
Becky Bruce b64f87c16f [POWERPC] Avoid unpaired stwcx. on some processors
The context switch code in the kernel issues a dummy stwcx. to clear the
reservation, as recommended by the architecture.  However, some processors
can have issues if this stwcx to address A occurs while the reservation
is already held to a different address B.  To avoid this problem, the dummy
stwcx. needs to be paired with a dummy lwarx to the same address.

This adds the dummy lwarx, and creates a cpu feature bit to indicate
which cpus are affected.  Tested on mpc8641_hpcn_defconfig in
arch/powerpc; build tested in arch/ppc.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-13 16:22:43 +11:00
..
4xx_io [POWERPC] Spelling fixes: arch/ppc/ 2007-05-12 11:32:49 +10:00
8xx_io [PPC] Fix cpm_dpram_addr returning phys mem instead of virt mem 2007-09-28 10:25:32 -05:00
8260_io [NET]: Kill eth_copy_and_sum(). 2007-07-10 22:08:12 -07:00
boot kbuild: restore arch/{ppc/xtensa}/boot cflags 2007-10-20 20:35:23 +02:00
configs [POWERPC] Remove APUS support from arch/ppc 2007-09-17 15:15:04 +10:00
kernel [POWERPC] Avoid unpaired stwcx. on some processors 2007-11-13 16:22:43 +11:00
lib [POWERPC] User rheap from arch/powerpc/lib 2007-05-09 23:28:17 -05:00
mm [POWERPC] ppc405 Fix arithmatic rollover bug when memory size under 16M 2007-11-01 07:15:59 -05:00
platforms [POWERPC] 4xx: Fix 4xx flush_tlb_page() 2007-11-01 07:15:09 -05:00
syslib [POWERPC] i8259: Add disable method 2007-11-08 14:15:29 +11:00
xmon [POWERPC] PPC: Use ARRAY_SIZE macro when appropriate 2007-02-08 16:08:25 +11:00
.gitignore [POWERPC] Only ignore arch/ppc/include, not arch/ppc/boot/include 2007-08-17 11:01:51 +10:00
Kconfig Combine instrumentation menus in kernel/Kconfig.instrumentation 2007-10-19 11:53:54 -07:00
Kconfig.debug ppc: Remove CHRP, POWER3 and POWER4 support from arch/ppc 2006-03-28 10:22:10 +11:00
Makefile kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP 2007-10-15 22:17:25 +02:00