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arm64: hibernate: rename dst to page in create_safe_exec_page

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create_safe_exec_page() allocates a safe page and maps it at a
specific location, also this function returns the physical address
of newly allocated page.

The destination VA, and PA are specified in arguments: dst_addr,
phys_dst_addr

However, within the function it uses "dst" which has unsigned long
type, but is actually a pointers in the current virtual space. This
is confusing to read.

Rename dst to more appropriate page (page that is created), and also
change its time to "void *"

Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Pavel Tatashin 2019-12-04 10:59:21 -05:00 committed by Will Deacon
parent a89d7ff933
commit 13373f0e65
1 changed files with 6 additions and 6 deletions
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12
arch/arm64/kernel/hibernate.c
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@ -198,18 +198,18 @@ static int create_safe_exec_page(void *src_start, size_t length,
unsigned long dst_addr,
phys_addr_t *phys_dst_addr)
{
void *page = (void *)get_safe_page(GFP_ATOMIC);
pgd_t *trans_pgd;
pgd_t *pgdp;
pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
unsigned long dst = get_safe_page(GFP_ATOMIC);
if (!dst)
if (!page)
return -ENOMEM;
memcpy((void *)dst, src_start, length);
__flush_icache_range(dst, dst + length);
memcpy(page, src_start, length);
__flush_icache_range((unsigned long)page, (unsigned long)page + length);
trans_pgd = (void *)get_safe_page(GFP_ATOMIC);
if (!trans_pgd)
@ -240,7 +240,7 @@ static int create_safe_exec_page(void *src_start, size_t length,
}
ptep = pte_offset_kernel(pmdp, dst_addr);
set_pte(ptep, pfn_pte(virt_to_pfn(dst), PAGE_KERNEL_EXEC));
set_pte(ptep, pfn_pte(virt_to_pfn(page), PAGE_KERNEL_EXEC));
/*
* Load our new page tables. A strict BBM approach requires that we
@ -259,7 +259,7 @@ static int create_safe_exec_page(void *src_start, size_t length,
write_sysreg(phys_to_ttbr(virt_to_phys(trans_pgd)), ttbr0_el1);
isb();
*phys_dst_addr = virt_to_phys((void *)dst);
*phys_dst_addr = virt_to_phys(page);
return 0;
}