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x86: kallsyms: disable absolute percpu symbols on !SMP

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scripts/kallsyms.c has a special --absolute-percpu command line option
which deals with the zero based per cpu offsets that are used when
building for SMP on x86_64.  This means that the option should only be
passed in that case, so add a Kconfig symbol with the correct predicate,
and use that instead.

Signed-off-by: Ard Biesheuvel <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Tested-by: Kees Cook <[email protected]>
Acked-by: Rusty Russell <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ard Biesheuvel 2016-03-15 14:58:12 -07:00 • committed by Linus Torvalds
commit 4d5d5664c9
2 changed files with 5 additions and 1 deletions
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4
init/Kconfig
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@ -1420,6 +1420,10 @@ config KALLSYMS_ALL
Say N unless you really need all symbols.
config KALLSYMS_ABSOLUTE_PERCPU
bool
default X86_64 && SMP
config PRINTK
default y
bool "Enable support for printk" if EXPERT