x86/paravirt: Remove clobbers parameter from paravirt patch functions

The clobbers parameter from paravirt_patch_default() et al isn't used
any longer. Remove it.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: xen-devel@lists.xenproject.org
Cc: virtualization@lists.linux-foundation.org
Cc: akataria@vmware.com
Cc: rusty@rustcorp.com.au
Cc: boris.ostrovsky@oracle.com
Cc: hpa@zytor.com
Link: https://lkml.kernel.org/r/20180828074026.820-7-jgross@suse.com

diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 7d13197d760b3878a150987aeaba972af46b30a0..225d871373edb1b4cafc5ad6f2dcb195c658be27 100644 (file)
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -85,7 +85,7 @@ struct pv_init_ops {
         * the number of bytes of code generated, as we nop pad the
         * rest in generic code.
         */
-       unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
+       unsigned (*patch)(u8 type, void *insnbuf,
                          unsigned long addr, unsigned len);
 } __no_randomize_layout;
 
@@ -373,14 +373,13 @@ extern struct pv_lock_ops pv_lock_ops;
 
 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len);
 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len);
-unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
+unsigned paravirt_patch_default(u8 type, void *insnbuf,
                                unsigned long addr, unsigned len);
 
 unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
                              const char *start, const char *end);
 
-unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
-                     unsigned long addr, unsigned len);
+unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len);
 
 int paravirt_disable_iospace(void);
 

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index b9d5e7c9ef43e66c0b8d19fc0346be1779fa78d4..9e755e1cfe92a2ccef6f2f8cb1371ed7d2b26652 100644 (file)
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -594,7 +594,7 @@ void __init_or_module apply_paravirt(struct paravirt_patch_site *start,
                BUG_ON(p->len > MAX_PATCH_LEN);
                /* prep the buffer with the original instructions */
                memcpy(insnbuf, p->instr, p->len);
-               used = pv_init_ops.patch(p->instrtype, p->clobbers, insnbuf,
+               used = pv_init_ops.patch(p->instrtype, insnbuf,
                                         (unsigned long)p->instr, p->len);
 
                BUG_ON(used > p->len);

diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 1abdbde350499e39e158eca3ca27d75086625a6e..287d34513f6a31677f3be19d0b186c07d754937b 100644 (file)
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -81,10 +81,8 @@ struct branch {
        u32 delta;
 } __attribute__((packed));
 
-static unsigned paravirt_patch_call(void *insnbuf,
-                                   const void *target, u16 tgt_clobbers,
-                                   unsigned long addr, u16 site_clobbers,
-                                   unsigned len)
+static unsigned paravirt_patch_call(void *insnbuf, const void *target,
+                                   unsigned long addr, unsigned len)
 {
        struct branch *b = insnbuf;
        unsigned long delta = (unsigned long)target - (addr+5);
@@ -149,7 +147,7 @@ static void *get_call_destination(u8 type)
        return *((void **)&tmpl + type);
 }
 
-unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
+unsigned paravirt_patch_default(u8 type, void *insnbuf,
                                unsigned long addr, unsigned len)
 {
        void *opfunc = get_call_destination(type);
@@ -172,10 +170,8 @@ unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
                /* If operation requires a jmp, then jmp */
                ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len);
        else
-               /* Otherwise call the function; assume target could
-                  clobber any caller-save reg */
-               ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY,
-                                         addr, clobbers, len);
+               /* Otherwise call the function. */
+               ret = paravirt_patch_call(insnbuf, opfunc, addr, len);
 
        return ret;
 }

diff --git a/arch/x86/kernel/paravirt_patch_32.c b/arch/x86/kernel/paravirt_patch_32.c
index 758e69d72ebf3c11797c7ab09778f9ceb9d84756..e5c3a438149e4ee7f71387412251b2cd5498e221 100644 (file)
--- a/arch/x86/kernel/paravirt_patch_32.c
+++ b/arch/x86/kernel/paravirt_patch_32.c
@@ -30,8 +30,7 @@ unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
 extern bool pv_is_native_spin_unlock(void);
 extern bool pv_is_native_vcpu_is_preempted(void);
 
-unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
-                     unsigned long addr, unsigned len)
+unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
 {
        const unsigned char *start, *end;
        unsigned ret;
@@ -70,7 +69,7 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
 
        default:
 patch_default: __maybe_unused
-               ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
+               ret = paravirt_patch_default(type, ibuf, addr, len);
                break;
 
 patch_site:

diff --git a/arch/x86/kernel/paravirt_patch_64.c b/arch/x86/kernel/paravirt_patch_64.c
index 9cb98f7b07c9afb1a8118cbf84be125567481ea0..835f1985a1151d2649380b54a02ecf018f933096 100644 (file)
--- a/arch/x86/kernel/paravirt_patch_64.c
+++ b/arch/x86/kernel/paravirt_patch_64.c
@@ -38,8 +38,7 @@ unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
 extern bool pv_is_native_spin_unlock(void);
 extern bool pv_is_native_vcpu_is_preempted(void);
 
-unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
-                     unsigned long addr, unsigned len)
+unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
 {
        const unsigned char *start, *end;
        unsigned ret;
@@ -80,7 +79,7 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
 
        default:
 patch_default: __maybe_unused
-               ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
+               ret = paravirt_patch_default(type, ibuf, addr, len);
                break;
 
 patch_site:

diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c
index 44685fb2a192f7969ed6453fb56c16ff5a33ca40..f194e5e1e95c58b8a37005dd780ff9ab25e303ef 100644 (file)
--- a/arch/x86/kernel/vsmp_64.c
+++ b/arch/x86/kernel/vsmp_64.c
@@ -69,7 +69,7 @@ asmlinkage __visible void vsmp_irq_enable(void)
 }
 PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_enable);
 
-static unsigned __init vsmp_patch(u8 type, u16 clobbers, void *ibuf,
+static unsigned __init vsmp_patch(u8 type, void *ibuf,
                                  unsigned long addr, unsigned len)
 {
        switch (type) {
@@ -77,9 +77,9 @@ static unsigned __init vsmp_patch(u8 type, u16 clobbers, void *ibuf,
        case PARAVIRT_PATCH(pv_irq_ops.irq_disable):
        case PARAVIRT_PATCH(pv_irq_ops.save_fl):
        case PARAVIRT_PATCH(pv_irq_ops.restore_fl):
-               return paravirt_patch_default(type, clobbers, ibuf, addr, len);
+               return paravirt_patch_default(type, ibuf, addr, len);
        default:
-               return native_patch(type, clobbers, ibuf, addr, len);
+               return native_patch(type, ibuf, addr, len);
        }
 
 }