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xen/pci-swiotlb: reduce visibility of symbols

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xen_swiotlb and pci_xen_swiotlb_init() are only used within the file
defining them, so make them static and remove the stubs. Otoh
pci_xen_swiotlb_detect() has a use (as function pointer) from the main
pci-swiotlb.c file - convert its stub to a #define to NULL.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Link: https://lore.kernel.org/r/aef5fc33-9c02-4df0-906a-5c813142e13c@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Jan Beulich 2021-09-17 12:49:04 +02:00 • committed by Juergen Gross
parent e243ae953b
commit 8e1034a526
2 changed files with 3 additions and 7 deletions
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6
arch/x86/include/asm/xen/swiotlb-xen.h
View file

@ -3,14 +3,10 @@
#define _ASM_X86_SWIOTLB_XEN_H
#ifdef CONFIG_SWIOTLB_XEN
extern int xen_swiotlb;
extern int __init pci_xen_swiotlb_detect(void);
extern void __init pci_xen_swiotlb_init(void);
extern int pci_xen_swiotlb_init_late(void);
#else
#define xen_swiotlb (0)
static inline int __init pci_xen_swiotlb_detect(void) { return 0; }
static inline void __init pci_xen_swiotlb_init(void) { }
#define pci_xen_swiotlb_detect NULL
static inline int pci_xen_swiotlb_init_late(void) { return -ENXIO; }
#endif

4
arch/x86/xen/pci-swiotlb-xen.c
View file

@ -18,7 +18,7 @@
#endif
#include <linux/export.h>
int xen_swiotlb __read_mostly;
static int xen_swiotlb __read_mostly;
/*
* pci_xen_swiotlb_detect - set xen_swiotlb to 1 if necessary
@ -56,7 +56,7 @@ int __init pci_xen_swiotlb_detect(void)
return xen_swiotlb;
}
void __init pci_xen_swiotlb_init(void)
static void __init pci_xen_swiotlb_init(void)
{
if (xen_swiotlb) {
xen_swiotlb_init_early();