[PATCH 01/21] x86/xen: Mark pv stub assembler symbol visible
From: Andi Kleen <hidden>
Date: 2017-11-27 21:40:37
Also in:
lkml
Subsystem:
paravirt_ops interface, the rest, x86 architecture (32-bit and 64-bit), xen hypervisor interface · Maintainers:
Juergen Gross, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, Stefano Stabellini
From: Andi Kleen <redacted> With LTO any external assembler symbol has to be marked __visible. Mark the generated asm PV stubs __visible to prevent a linker error. Signed-off-by: Andi Kleen <redacted> --- arch/x86/include/asm/paravirt.h | 3 ++- drivers/xen/time.c | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 283efcaac8af..cf2861aa4df0 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h@@ -745,7 +745,8 @@ static __always_inline bool pv_vcpu_is_preempted(long cpu) */ #define PV_THUNK_NAME(func) "__raw_callee_save_" #func #define PV_CALLEE_SAVE_REGS_THUNK(func) \ - extern typeof(func) __raw_callee_save_##func; \ + extern __visible typeof(func) __raw_callee_save_##func; \ + extern __visible typeof(func) func; \ \ asm(".pushsection .text;" \ ".globl " PV_THUNK_NAME(func) ";" \
diff --git a/drivers/xen/time.c b/drivers/xen/time.c
index 3e741cd1409c..708a00c337d7 100644
--- a/drivers/xen/time.c
+++ b/drivers/xen/time.c@@ -144,7 +144,7 @@ void xen_get_runstate_snapshot(struct vcpu_runstate_info *res) } /* return true when a vcpu could run but has no real cpu to run on */ -bool xen_vcpu_stolen(int vcpu) +__visible bool xen_vcpu_stolen(int vcpu) { return per_cpu(xen_runstate, vcpu).state == RUNSTATE_runnable; }
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2.13.6