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ARM: 8033/1: fix big endian __pv_phys_pfn_offset size related issue

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Fix e26a9e00af 'ARM: Better
virt_to_page() handling' replaced __pv_phys_offset with
__pv_phys_pfn_offset. Also note that size of __pv_phys_offset
was quad but size of __pv_phys_pfn_offset is word. Instruction
that used to update __pv_phys_offset which address is in r6
had to update low word of __pv_phys_offset so it used #LOW_OFFSET
macro for store offset. Now when size of __pv_phys_pfn_offset is
word, no difference between little endian and big endian should
exist - i.e no offset should be used when __pv_phys_pfn_offset
is stored.

Note that for little endian image proposed change is noop,
since in little endian case #LOW_OFFSET is defined 0 anyway.

Reported-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Victor Kamensky 2014-04-22 02:25:36 +01:00 committed by Russell King
parent 4530e4b6a4
commit e3892e9160
1 changed files with 1 additions and 1 deletions
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2
arch/arm/kernel/head.S
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@ -587,7 +587,7 @@ __fixup_pv_table:
add r6, r6, r3 @ adjust __pv_phys_pfn_offset address
add r7, r7, r3 @ adjust __pv_offset address
mov r0, r8, lsr #12 @ convert to PFN
str r0, [r6, #LOW_OFFSET] @ save computed PHYS_OFFSET to __pv_phys_pfn_offset
str r0, [r6] @ save computed PHYS_OFFSET to __pv_phys_pfn_offset
strcc ip, [r7, #HIGH_OFFSET] @ save to __pv_offset high bits
mov r6, r3, lsr #24 @ constant for add/sub instructions
teq r3, r6, lsl #24 @ must be 16MiB aligned