Commit-ID: b69656fa7ea2f75e47d7bd5b9430359fa46488af Gitweb: https://git.kernel.org/tip/b69656fa7ea2f75e47d7bd5b9430359fa46488af Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> AuthorDate: Wed, 3 Apr 2019 09:39:45 +0200 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Wed, 3 Apr 2019 09:39:45 +0200 x86/uaccess: Fix up the fixup New tooling got confused about this: arch/x86/lib/memcpy_64.o: warning: objtool: .fixup+0x7: return with UACCESS enabled While the code isn't wrong, it is tedious (if at all possible) to figure out what function a particular chunk of .fixup belongs to. This then confuses the objtool uaccess validation. Instead of returning directly from the .fixup, jump back into the right function. Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/lib/memcpy_64.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/lib/memcpy_64.S b/arch/x86/lib/memcpy_64.S index 3b24dc05251c..9d05572370ed 100644 --- a/arch/x86/lib/memcpy_64.S +++ b/arch/x86/lib/memcpy_64.S @@ -257,6 +257,7 @@ ENTRY(__memcpy_mcsafe) /* Copy successful. Return zero */ .L_done_memcpy_trap: xorl %eax, %eax +.L_done: ret ENDPROC(__memcpy_mcsafe) EXPORT_SYMBOL_GPL(__memcpy_mcsafe) @@ -273,7 +274,7 @@ EXPORT_SYMBOL_GPL(__memcpy_mcsafe) addl %edx, %ecx .E_trailing_bytes: mov %ecx, %eax - ret + jmp .L_done /* * For write fault handling, given the destination is unaligned,
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