enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/arch/parisc/include/asm/fixmap.h
..
..
@@ -15,17 +15,35 @@
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  * from areas congruently mapped with user space.  It is 8MB large
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  * and must be 16MB aligned */
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 #define TMPALIAS_MAP_START	((__PAGE_OFFSET) - 16*1024*1024)
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+
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+#define FIXMAP_SIZE		(FIX_BITMAP_COUNT << PAGE_SHIFT)
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+#define FIXMAP_START		(TMPALIAS_MAP_START - FIXMAP_SIZE)
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 /* This is the kernel area for all maps (vmalloc, dma etc.)  most
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  * usually, it extends up to TMPALIAS_MAP_START.  Virtual addresses
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  * 0..GATEWAY_PAGE_SIZE are reserved for the gateway page */
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 #define KERNEL_MAP_START	(GATEWAY_PAGE_SIZE)
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-#define KERNEL_MAP_END		(TMPALIAS_MAP_START)
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+#define KERNEL_MAP_END		(FIXMAP_START)
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 #ifndef __ASSEMBLY__
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+
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+
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+enum fixed_addresses {
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+	/* Support writing RO kernel text via kprobes, jump labels, etc. */
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+	FIX_TEXT_POKE0,
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+	FIX_TEXT_KEXEC,
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+	FIX_BITMAP_COUNT
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+};
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+
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 extern void *parisc_vmalloc_start;
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 #define PCXL_DMA_MAP_SIZE	(8*1024*1024)
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 #define VMALLOC_START		((unsigned long)parisc_vmalloc_start)
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 #define VMALLOC_END		(KERNEL_MAP_END)
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+
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+#define __fix_to_virt(_x) (FIXMAP_START + ((_x) << PAGE_SHIFT))
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+
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+void set_fixmap(enum fixed_addresses idx, phys_addr_t phys);
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+void clear_fixmap(enum fixed_addresses idx);
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+
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 #endif /*__ASSEMBLY__*/
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 #endif /*_ASM_FIXMAP_H*/