From: Pavel Tatashin <pasha.tatashin@soleen.com>
To: pasha.tatashin@soleen.com, jmorris@namei.org, sashal@kernel.org,
ebiederm@xmission.com, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, corbet@lwn.net,
catalin.marinas@arm.com, will@kernel.org,
linux-arm-kernel@lists.infradead.org, marc.zyngier@arm.com,
james.morse@arm.com, vladimir.murzin@arm.com,
matthias.bgg@gmail.com, bhsharma@redhat.com, linux-mm@kvack.org,
mark.rutland@arm.com
Subject: [PATCH v4 06/17] arm64: hibernate: rename dst to page in create_safe_exec_page
Date: Mon, 9 Sep 2019 14:12:10 -0400 [thread overview]
Message-ID: <20190909181221.309510-7-pasha.tatashin@soleen.com> (raw)
In-Reply-To: <20190909181221.309510-1-pasha.tatashin@soleen.com>
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>
---
arch/arm64/kernel/hibernate.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c
index 7bbeb33c700d..750ecc7f2cbe 100644
--- a/arch/arm64/kernel/hibernate.c
+++ b/arch/arm64/kernel/hibernate.c
@@ -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;
}
--
2.23.0
next prev parent reply other threads:[~2019-09-09 18:12 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-09 18:12 [PATCH v4 00/17] arm64: MMU enabled kexec relocation Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 01/17] kexec: quiet down kexec reboot Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 02/17] arm64: hibernate: pass the allocated pgdp to ttbr0 Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 03/17] arm64: hibernate: check pgd table allocation Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 04/17] arm64: hibernate: use get_safe_page directly Pavel Tatashin
2019-09-10 8:03 ` Matthias Brugger
2019-09-10 9:10 ` Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 05/17] arm64: hibernate: remove gotos in create_safe_exec_page Pavel Tatashin
2019-09-10 8:21 ` Matthias Brugger
2019-09-10 9:12 ` Pavel Tatashin
2019-09-09 18:12 ` Pavel Tatashin [this message]
2019-09-09 18:12 ` [PATCH v4 07/17] arm64: hibernate: add PUD_SECT_RDONLY Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 08/17] arm64: hibernate: add trans_pgd public functions Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 09/17] arm64: hibernate: move page handling function to new trans_pgd.c Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 10/17] arm64: trans_pgd: make trans_pgd_map_page generic Pavel Tatashin
2019-09-10 8:29 ` Matthias Brugger
2019-09-10 9:20 ` Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 11/17] arm64: trans_pgd: pass allocator trans_pgd_create_copy Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 12/17] arm64: trans_pgd: pass NULL instead of init_mm to *_populate functions Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 13/17] kexec: add machine_kexec_post_load() Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 14/17] arm64: kexec: move relocation function setup and clean up Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 15/17] arm64: kexec: add expandable argument to relocation function Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 16/17] arm64: kexec: configure trans_pgd page table for kexec Pavel Tatashin
2019-09-09 18:12 ` [PATCH v4 17/17] arm64: kexec: enable MMU during kexec relocation Pavel Tatashin
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