From 3d013424de1efc2c9e68c6c06e76159e467c7ba8 Mon Sep 17 00:00:00 2001 From: Juergen Gross Date: Wed, 14 Jun 2023 09:35:00 +0200 Subject: [PATCH] x86/xen: add prototypes for paravirt mmu functions The paravirt MMU functions called via the PV_CALLEE_SAVE_REGS_THUNK() macro can't be defined to be static, as the macro is generating a function via asm() statement calling the paravirt MMU function. In order to avoid warnings when specifying "-Wmissing-prototypes" for the build, add local prototypes (there should never be any external caller of those functions). Reported-by: Arnd Bergmann Signed-off-by: Juergen Gross Reviewed-by: Boris Ostrovsky Link: https://lore.kernel.org/r/20230614073501.10101-2-jgross@suse.com Signed-off-by: Juergen Gross --- arch/x86/xen/mmu_pv.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c index b3b8d28..e0a9751 100644 --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -86,6 +86,22 @@ #include "mmu.h" #include "debugfs.h" +/* + * Prototypes for functions called via PV_CALLEE_SAVE_REGS_THUNK() in order + * to avoid warnings with "-Wmissing-prototypes". + */ +pteval_t xen_pte_val(pte_t pte); +pgdval_t xen_pgd_val(pgd_t pgd); +pmdval_t xen_pmd_val(pmd_t pmd); +pudval_t xen_pud_val(pud_t pud); +p4dval_t xen_p4d_val(p4d_t p4d); +pte_t xen_make_pte(pteval_t pte); +pgd_t xen_make_pgd(pgdval_t pgd); +pmd_t xen_make_pmd(pmdval_t pmd); +pud_t xen_make_pud(pudval_t pud); +p4d_t xen_make_p4d(p4dval_t p4d); +pte_t xen_make_pte_init(pteval_t pte); + #ifdef CONFIG_X86_VSYSCALL_EMULATION /* l3 pud for userspace vsyscall mapping */ static pud_t level3_user_vsyscall[PTRS_PER_PUD] __page_aligned_bss; -- 2.7.4