x86/alternative: Add text_opcode_size()

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Introduce a common helper to map *_INSN_OPCODE to *_INSN_SIZE.

Tested-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20191111132457.875666061@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Peter Zijlstra 2019-10-09 12:44:17 +02:00 • committed by Ingo Molnar

parent c12af4407f

commit 254d2c0451

2 changed files with 32 additions and 23 deletions

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43

arch/x86/include/asm/text-patching.h

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12

arch/x86/kernel/alternative.c

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