x86: Make cpu_tss available to external modules
Commit 75182b1632
("x86/asm/entry: Switch all C consumers of
kernel_stack to this_cpu_sp0()") changed current_thread_info
to use this_cpu_sp0, and indirectly made it rely on init_tss
which was exported with EXPORT_PER_CPU_SYMBOL_GPL.
As a result some macros and inline functions such as set/get_fs,
test_thread_flag and variants have been made unusable for
external modules.
Make cpu_tss exported with EXPORT_PER_CPU_SYMBOL so that these
functions are accessible again, as they were previously.
Signed-off-by: Marc Dionne <marc.dionne@your-file-system.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/1430763404-21221-1-git-send-email-marc.dionne@your-file-system.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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@ -57,7 +57,7 @@ __visible DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, cpu_tss) = {
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.io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 },
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.io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 },
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#endif
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#endif
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};
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};
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EXPORT_PER_CPU_SYMBOL_GPL(cpu_tss);
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EXPORT_PER_CPU_SYMBOL(cpu_tss);
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#ifdef CONFIG_X86_64
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#ifdef CONFIG_X86_64
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static DEFINE_PER_CPU(unsigned char, is_idle);
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static DEFINE_PER_CPU(unsigned char, is_idle);
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