x86/hweight: Don't clobber %rdi

[cascardo/linux.git] / arch / x86 / lib / hweight.S

diff --git a/arch/x86/lib/hweight.S b/arch/x86/lib/hweight.S
index 02de3d7..8a602a1 100644 (file)
--- a/arch/x86/lib/hweight.S
+++ b/arch/x86/lib/hweight.S
@@ -35,6 +35,7 @@ ENDPROC(__sw_hweight32)
 
 ENTRY(__sw_hweight64)
 #ifdef CONFIG_X86_64
+       pushq   %rdi
        pushq   %rdx
 
        movq    %rdi, %rdx                      # w -> t
@@ -60,6 +61,7 @@ ENTRY(__sw_hweight64)
        shrq    $56, %rax                       # w = w_tmp >> 56
 
        popq    %rdx
+       popq    %rdi
        ret
 #else /* CONFIG_X86_32 */
        /* We're getting an u64 arg in (%eax,%edx): unsigned long hweight64(__u64 w) */