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riscv: fix the global name pfn_base confliction error

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RISCV uses a global variable pfn_base for page/pfn translation. But this
is a common name and will be used elsewhere. In those cases, the
page-pfn macros which refer to this name will be referred to the
local/input variable instead. (such as in vfio_pin_pages_remote). This
make everything wrong.

This patch changes the name from pfn_base to riscv_pfn_base to fix
this problem.

Signed-off-by: Kenneth Lee <liguozhu@hisilicon.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Kenneth Lee 2021-07-28 15:15:57 +08:00 committed by Palmer Dabbelt
parent fe45ffa4c5
commit fb31f0a499
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GPG Key ID: 2E1319F35FBB1889
2 changed files with 5 additions and 5 deletions
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4
arch/riscv/include/asm/page.h
View File

@ -79,8 +79,8 @@ typedef struct page *pgtable_t;
#endif
#ifdef CONFIG_MMU
extern unsigned long pfn_base;
#define ARCH_PFN_OFFSET (pfn_base)
extern unsigned long riscv_pfn_base;
#define ARCH_PFN_OFFSET (riscv_pfn_base)
#else
#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
#endif /* CONFIG_MMU */

6
arch/riscv/mm/init.c
View File

@ -214,8 +214,8 @@ static struct pt_alloc_ops _pt_ops __initdata;
#define pt_ops _pt_ops
#endif
unsigned long pfn_base __ro_after_init;
EXPORT_SYMBOL(pfn_base);
unsigned long riscv_pfn_base __ro_after_init;
EXPORT_SYMBOL(riscv_pfn_base);
pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_bss;
pgd_t trampoline_pg_dir[PTRS_PER_PGD] __page_aligned_bss;
@ -587,7 +587,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
kernel_map.va_pa_offset = PAGE_OFFSET - kernel_map.phys_addr;
kernel_map.va_kernel_pa_offset = kernel_map.virt_addr - kernel_map.phys_addr;
pfn_base = PFN_DOWN(kernel_map.phys_addr);
riscv_pfn_base = PFN_DOWN(kernel_map.phys_addr);
/* Sanity check alignment and size */
BUG_ON((PAGE_OFFSET % PGDIR_SIZE) != 0);