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authorSudeep Holla <sudeep.holla@arm.com>2016-10-28 11:45:28 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-10 19:30:53 +0300
commitfac51482577d5e05bbb0efa8d602a3c2111098bf (patch)
tree0cd98898970e87486aab524e09a080231aa2bf7a /drivers/base/cacheinfo.c
parent79543cf2b18ea4a35f8864849d7ad8882ea8a23d (diff)
downloadlinux-fac51482577d5e05bbb0efa8d602a3c2111098bf.tar.xz
drivers: base: cacheinfo: fix x86 with CONFIG_OF enabled
With CONFIG_OF enabled on x86, we get the following error on boot: " Failed to find cpu0 device node Unable to detect cache hierarchy from DT for CPU 0 " and the cacheinfo fails to get populated in the corresponding sysfs entries. This is because cache_setup_of_node looks for of_node for setting up the shared cpu_map without checking that it's already populated in the architecture specific callback. In order to indicate that the shared cpu_map is already populated, this patch introduces a boolean `cpu_map_populated` in struct cpu_cacheinfo that can be used by the generic code to skip cache_shared_cpu_map_setup. This patch also sets that boolean for x86. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/cacheinfo.c')
-rw-r--r--drivers/base/cacheinfo.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index e9fd32e91668..ecde8957835a 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -106,6 +106,9 @@ static int cache_shared_cpu_map_setup(unsigned int cpu)
unsigned int index;
int ret;
+ if (this_cpu_ci->cpu_map_populated)
+ return 0;
+
ret = cache_setup_of_node(cpu);
if (ret)
return ret;