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x86/paravirt: Standardize 'insn_buff' variable names

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We currently have 6 (!) separate naming variants to name temporary instruction
buffers that are used for code patching:

 - insnbuf
 - insnbuff
 - insn_buff
 - insn_buffer
 - ibuf
 - ibuffer

These are used as local variables, percpu fields and function parameters.

Standardize all the names to a single variant: 'insn_buff'.

Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2019-04-25 13:03:31 +02:00
parent fc93dfd934
commit 1fc654cf6e
8 changed files with 93 additions and 96 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
arch/x86/kernel/paravirt.c
View File

@@ -70,11 +70,11 @@ struct branch {
u32 delta;
} __attribute__((packed));
static unsigned paravirt_patch_call(void *insnbuf, const void *target,
static unsigned paravirt_patch_call(void *insn_buff, const void *target,
unsigned long addr, unsigned len)
{
const int call_len = 5;
struct branch *b = insnbuf;
struct branch *b = insn_buff;
unsigned long delta = (unsigned long)target - (addr+call_len);
if (len < call_len) {
@@ -97,10 +97,10 @@ u64 notrace _paravirt_ident_64(u64 x)
return x;
}
static unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
static unsigned paravirt_patch_jmp(void *insn_buff, const void *target,
unsigned long addr, unsigned len)
{
struct branch *b = insnbuf;
struct branch *b = insn_buff;
unsigned long delta = (unsigned long)target - (addr+5);
if (len < 5) {
@@ -125,7 +125,7 @@ void __init native_pv_lock_init(void)
static_branch_disable(&virt_spin_lock_key);
}
unsigned paravirt_patch_default(u8 type, void *insnbuf,
unsigned paravirt_patch_default(u8 type, void *insn_buff,
unsigned long addr, unsigned len)
{
/*
@@ -137,28 +137,28 @@ unsigned paravirt_patch_default(u8 type, void *insnbuf,
if (opfunc == NULL)
/* If there's no function, patch it with a ud2a (BUG) */
ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a));
ret = paravirt_patch_insns(insn_buff, len, ud2a, ud2a+sizeof(ud2a));
else if (opfunc == _paravirt_nop)
ret = 0;
#ifdef CONFIG_PARAVIRT_XXL
/* identity functions just return their single argument */
else if (opfunc == _paravirt_ident_64)
ret = paravirt_patch_ident_64(insnbuf, len);
ret = paravirt_patch_ident_64(insn_buff, len);
else if (type == PARAVIRT_PATCH(cpu.iret) ||
type == PARAVIRT_PATCH(cpu.usergs_sysret64))
/* If operation requires a jmp, then jmp */
ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len);
ret = paravirt_patch_jmp(insn_buff, opfunc, addr, len);
#endif
else
/* Otherwise call the function. */
ret = paravirt_patch_call(insnbuf, opfunc, addr, len);
ret = paravirt_patch_call(insn_buff, opfunc, addr, len);
return ret;
}
unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
unsigned paravirt_patch_insns(void *insn_buff, unsigned len,
const char *start, const char *end)
{
unsigned insn_len = end - start;
@@ -166,7 +166,7 @@ unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
/* Alternative instruction is too large for the patch site and we cannot continue: */
BUG_ON(insn_len > len || start == NULL);
memcpy(insnbuf, start, insn_len);
memcpy(insn_buff, start, insn_len);
return insn_len;
}