diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-10-27 13:37:40 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-10-27 13:37:40 -0300 |
| commit | badc0e42604c4465facd81d2323e98b3b1eb9188 (patch) | |
| tree | e61811e7ddf70517f4b546d522ba3b630b38f50f /arch/x86/kernel/paravirt.c | |
| parent | f19866e5cb04f8f007cb422132ea4611cdacc8e3 (diff) | |
Linux-libre 4.2.4-gnupck-4.2.4-gnu
Diffstat (limited to 'arch/x86/kernel/paravirt.c')
| -rw-r--r-- | arch/x86/kernel/paravirt.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 58bcfb67c..ebb5657ee 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -41,10 +41,18 @@ #include <asm/timer.h> #include <asm/special_insns.h> -/* nop stub */ -void _paravirt_nop(void) -{ -} +/* + * nop stub, which must not clobber anything *including the stack* to + * avoid confusing the entry prologues. + */ +extern void _paravirt_nop(void); +asm (".pushsection .entry.text, \"ax\"\n" + ".global _paravirt_nop\n" + "_paravirt_nop:\n\t" + "ret\n\t" + ".size _paravirt_nop, . - _paravirt_nop\n\t" + ".type _paravirt_nop, @function\n\t" + ".popsection"); /* identity function, which can be inlined */ u32 _paravirt_ident_32(u32 x) |