tree 3a5a28311c024636af112d9d89dcdcb723ea960b
parent 8f4faed01e3015955801c8ef066ec7fd7a8b3902
author Peter Zijlstra <peterz@infradead.org> 1551450273 +0100
committer Ingo Molnar <mingo@kernel.org> 1554276989 +0200

x86/uaccess: Move copy_user_handle_tail() into asm

By writing the function in asm we avoid cross object code flow and
objtool no longer gets confused about a 'stray' CLAC.

Also; the asm version is actually _simpler_.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>