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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> |
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| .. | ||
| asm-offsets.c | ||
| cpu_setup_power4.S | ||
| entry.S | ||
| head_4xx.S | ||
| head_8xx.S | ||
| head_44x.S | ||
| head_booke.h | ||
| head_fsl_booke.S | ||
| head.S | ||
| machine_kexec.c | ||
| Makefile | ||
| misc.S | ||
| pci.c | ||
| ppc_htab.c | ||
| ppc_ksyms.c | ||
| ppc-stub.c | ||
| relocate_kernel.S | ||
| rio.c | ||
| semaphore.c | ||
| setup.c | ||
| smp-tbsync.c | ||
| smp.c | ||
| softemu8xx.c | ||
| time.c | ||
| traps.c | ||
| vmlinux.lds.S | ||