x86, dumpstack: Fix unused variable warning
In dump_stack function, bp isn't used anymore, which is introduced by commit 9c0729dc. This patch removes bp completely. Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Cc: Soeren Sandmann <sandmann@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@zytor.com> LKML-Reference: <AANLkTik9U_Z0WSZ7YjrykER_pBUfPDdgUUmtYx=R74nL@mail.gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
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