x86/asm/entry/32: Simplify pushes of zeroed pt_regs->REGs

[cascardo/linux.git] / arch / x86 / entry / entry_64_compat.S

diff --git a/arch/x86/entry/entry_64_compat.S b/arch/x86/entry/entry_64_compat.S
index 847f2f0..e1721da 100644 (file)
--- a/arch/x86/entry/entry_64_compat.S
+++ b/arch/x86/entry/entry_64_compat.S
@@ -72,24 +72,23 @@ ENTRY(entry_SYSENTER_compat)
        pushfq                          /* pt_regs->flags (except IF = 0) */
        orl     $X86_EFLAGS_IF, (%rsp)  /* Fix saved flags */
        pushq   $__USER32_CS            /* pt_regs->cs */
-       xorq    %r8,%r8
-       pushq   %r8                     /* pt_regs->ip = 0 (placeholder) */
+       pushq   $0                      /* pt_regs->ip = 0 (placeholder) */
        pushq   %rax                    /* pt_regs->orig_ax */
        pushq   %rdi                    /* pt_regs->di */
        pushq   %rsi                    /* pt_regs->si */
        pushq   %rdx                    /* pt_regs->dx */
        pushq   %rcx                    /* pt_regs->cx */
        pushq   $-ENOSYS                /* pt_regs->ax */
-       pushq   %r8                     /* pt_regs->r8  = 0 */
-       pushq   %r8                     /* pt_regs->r9  = 0 */
-       pushq   %r8                     /* pt_regs->r10 = 0 */
-       pushq   %r8                     /* pt_regs->r11 = 0 */
+       pushq   $0                      /* pt_regs->r8  = 0 */
+       pushq   $0                      /* pt_regs->r9  = 0 */
+       pushq   $0                      /* pt_regs->r10 = 0 */
+       pushq   $0                      /* pt_regs->r11 = 0 */
        pushq   %rbx                    /* pt_regs->rbx */
        pushq   %rbp                    /* pt_regs->rbp (will be overwritten) */
-       pushq   %r8                     /* pt_regs->r12 = 0 */
-       pushq   %r8                     /* pt_regs->r13 = 0 */
-       pushq   %r8                     /* pt_regs->r14 = 0 */
-       pushq   %r8                     /* pt_regs->r15 = 0 */
+       pushq   $0                      /* pt_regs->r12 = 0 */
+       pushq   $0                      /* pt_regs->r13 = 0 */
+       pushq   $0                      /* pt_regs->r14 = 0 */
+       pushq   $0                      /* pt_regs->r15 = 0 */
        cld
 
        /*
@@ -205,17 +204,16 @@ ENTRY(entry_SYSCALL_compat)
        pushq   %rdx                    /* pt_regs->dx */
        pushq   %rbp                    /* pt_regs->cx (stashed in bp) */
        pushq   $-ENOSYS                /* pt_regs->ax */
-       xorq    %r8,%r8
-       pushq   %r8                     /* pt_regs->r8  = 0 */
-       pushq   %r8                     /* pt_regs->r9  = 0 */
-       pushq   %r8                     /* pt_regs->r10 = 0 */
-       pushq   %r8                     /* pt_regs->r11 = 0 */
+       pushq   $0                      /* pt_regs->r8  = 0 */
+       pushq   $0                      /* pt_regs->r9  = 0 */
+       pushq   $0                      /* pt_regs->r10 = 0 */
+       pushq   $0                      /* pt_regs->r11 = 0 */
        pushq   %rbx                    /* pt_regs->rbx */
        pushq   %rbp                    /* pt_regs->rbp (will be overwritten) */
-       pushq   %r8                     /* pt_regs->r12 = 0 */
-       pushq   %r8                     /* pt_regs->r13 = 0 */
-       pushq   %r8                     /* pt_regs->r14 = 0 */
-       pushq   %r8                     /* pt_regs->r15 = 0 */
+       pushq   $0                      /* pt_regs->r12 = 0 */
+       pushq   $0                      /* pt_regs->r13 = 0 */
+       pushq   $0                      /* pt_regs->r14 = 0 */
+       pushq   $0                      /* pt_regs->r15 = 0 */
 
        /*
         * User mode is traced as though IRQs are on, and SYSENTER
@@ -316,11 +314,10 @@ ENTRY(entry_INT80_compat)
        pushq   %rdx                    /* pt_regs->dx */
        pushq   %rcx                    /* pt_regs->cx */
        pushq   $-ENOSYS                /* pt_regs->ax */
-       xorq    %r8,%r8
-       pushq   %r8                     /* pt_regs->r8  = 0 */
-       pushq   %r8                     /* pt_regs->r9  = 0 */
-       pushq   %r8                     /* pt_regs->r10 = 0 */
-       pushq   %r8                     /* pt_regs->r11 = 0 */
+       pushq   $0                      /* pt_regs->r8  = 0 */
+       pushq   $0                      /* pt_regs->r9  = 0 */
+       pushq   $0                      /* pt_regs->r10 = 0 */
+       pushq   $0                      /* pt_regs->r11 = 0 */
        pushq   %rbx                    /* pt_regs->rbx */
        pushq   %rbp                    /* pt_regs->rbp */
        pushq   %r12                    /* pt_regs->r12 */