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authorFinn Thain <fthain@telegraphics.com.au>2019-01-15 15:18:56 +1100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-01-22 10:21:45 +0100
commit20e07af71f34d9d1f18aefde6ed234d775fa62bc (patch)
treef720dd22d83d71db9fcbf36430461e497791501c /arch/powerpc/Kconfig
parent537f3286ad8fdd96e56a027160867ef092651353 (diff)
downloadlinux-20e07af71f34d9d1f18aefde6ed234d775fa62bc.tar.bz2
powerpc: Adopt nvram module for PPC64
Adopt nvram module to reduce code duplication. This means CONFIG_NVRAM becomes available to PPC64 builds. Previously it was only available to PPC32 builds because it depended on CONFIG_GENERIC_NVRAM. The IOC_NVRAM_GET_OFFSET ioctl as implemented on PPC64 validates the offset returned by pmac_get_partition(). Do the same in the nvram module. Note that the old PPC32 generic_nvram module lacked this test. So when CONFIG_PPC32 && CONFIG_PPC_PMAC, the IOC_NVRAM_GET_OFFSET ioctl would have returned 0 (always). But when CONFIG_PPC64 && CONFIG_PPC_PMAC, the IOC_NVRAM_GET_OFFSET ioctl would have returned -1 (which is -EPERM) when the requested partition was not found. With this patch, the result is now -EINVAL on both PPC32 and PPC64 when the requested PowerMac NVRAM partition is not found. This is a userspace- visible change, in the non-existent partition case, which would be in an error path for an IOC_NVRAM_GET_OFFSET ioctl syscall. Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc/Kconfig')
-rw-r--r--arch/powerpc/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index f62e6a3f9c4e..621912365508 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -178,7 +178,7 @@ config PPC
select HAVE_ARCH_KGDB
select HAVE_ARCH_MMAP_RND_BITS
select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
- select HAVE_ARCH_NVRAM_OPS if PPC32
+ select HAVE_ARCH_NVRAM_OPS
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
select HAVE_CBPF_JIT if !PPC64