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author | Thomas Gleixner <tglx@linutronix.de> | 2016-05-10 09:20:33 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2016-05-10 09:28:31 +0200 |
commit | 8d415ee225a3d15d3e3029524350e8237a4de7b8 (patch) | |
tree | 7352acadefca3b72f6f3d374f2d5436dd4468cb9 /Documentation/pcmcia | |
parent | 4abac0d0bbc628df5f26845fe05ffc6b3a6533dd (diff) | |
download | linux-8d415ee225a3d15d3e3029524350e8237a4de7b8.tar.bz2 |
x86/topology: Set x86_max_cores to 1 for CONFIG_SMP=n
Josef reported that the uncore driver trips over with CONFIG_SMP=n because
x86_max_cores is 16 instead of 12.
The reason is, that for SMP=n the extended topology detection is a NOOP and
the cache leaf is used to determine the number of cores. That's wrong in two
aspects:
1) The cache leaf enumerates the maximum addressable number of cores in the
package, which is obviously not correct
2) UP has no business with topology bits at all.
Make intel_num_cpu_cores() return 1 for CONFIG_SMP=n
Reported-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kernel-team <Kernel-team@fb.com>
Cc: Kan Liang <kan.liang@intel.com>
Link: http://lkml.kernel.org/r/761b4a2a-0332-7954-f030-c6639f949612@fb.com
Diffstat (limited to 'Documentation/pcmcia')
0 files changed, 0 insertions, 0 deletions