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Mathias Krause authored
The x86 exception table sorting was changed in this recent commit: 29934b0f ("x86/extable: use generic search and sort routines") ... to use the arch independent code in lib/extable.c. However, the patch was mangled somehow on its way into the kernel from the last version posted at: https://lkml.org/lkml/2016/1/27/232 The committed version kind of attempted to incorporate the changes of contemporary commit done in the x86 tree: 548acf19 ("x86/mm: Expand the exception table logic to allow new handling options") ... as in _completely_ _ignoring_ the x86 specific 'handler' member of struct exception_table_entry. This effectively broke the sorting as entries will only be partly swapped now. Fortunately, the x86 Kconfig selects BUILDTIME_EXTABLE_SORT, so the exception table doesn't need to be sorted at runtime. However, in case that ever changes, we better not break the exception table sorting just because of that. Fix this by providing a swap_ex_entry_fixup() macro that takes care of the 'handler' member. Signed-off-by:
Mathias Krause <minipli@googlemail.com> Reviewed-by:
Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/1462914422-2911-1-git-send-email-minipli@googlemail.comSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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