x86/paravirt: Kill some unused patching functions

paravirt_patch_ignore() is completely unused and paravirt_patch_nop()
doesn't do a whole lot. Remove them both.

Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: virtualization@lists.linux-foundation.org
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1446542329-32037-1-git-send-email-bp@alien8.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 31247b5..e1f31df 100644 (file)
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -402,10 +402,8 @@ extern struct pv_lock_ops pv_lock_ops;
        __visible extern const char start_##ops##_##name[], end_##ops##_##name[];       \
        asm(NATIVE_LABEL("start_", ops, name) code NATIVE_LABEL("end_", ops, name))
 
-unsigned paravirt_patch_nop(void);
 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len);
 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len);
-unsigned paravirt_patch_ignore(unsigned len);
 unsigned paravirt_patch_call(void *insnbuf,
                             const void *target, u16 tgt_clobbers,
                             unsigned long addr, u16 site_clobbers,

diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index c2130ae..4f32a10 100644 (file)
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -74,16 +74,6 @@ void __init default_banner(void)
 /* Undefined instruction for dealing with missing ops pointers. */
 static const unsigned char ud2a[] = { 0x0f, 0x0b };
 
-unsigned paravirt_patch_nop(void)
-{
-       return 0;
-}
-
-unsigned paravirt_patch_ignore(unsigned len)
-{
-       return len;
-}
-
 struct branch {
        unsigned char opcode;
        u32 delta;
@@ -152,8 +142,7 @@ unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
                /* If there's no function, patch it with a ud2a (BUG) */
                ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a));
        else if (opfunc == _paravirt_nop)
-               /* If the operation is a nop, then nop the callsite */
-               ret = paravirt_patch_nop();
+               ret = 0;
 
        /* identity functions just return their single argument */
        else if (opfunc == _paravirt_ident_32)