From: "Wang, Yalin" <Yalin.Wang@sonymobile.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>,
Jiang Liu <jiang.liu@huawei.com>,
"'linux-mm@kvack.org'" <linux-mm@kvack.org>,
Will Deacon <Will.Deacon@arm.com>,
"'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>,
"'linux-arm-kernel@lists.infradead.org'"
<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH v2] arm:extend __init_end to a page align address
Date: Tue, 16 Sep 2014 09:44:15 +0800 [thread overview]
Message-ID: <35FD53F367049845BC99AC72306C23D103D6DB49160B@CNBJMBX05.corpusers.net> (raw)
this patch change the __init_end address to a
page align address, so that free_initmem() can
free the whole .init section, because if the end
address is not page aligned, it will round down to
a page align address, then the tail unligned page
will not be freed.
Signed-off-by: wang <yalin.wang2010@gmail.com>
---
arch/arm/kernel/vmlinux.lds.S | 2 +-
arch/arm64/kernel/vmlinux.lds.S | 2 +-
include/asm-generic/vmlinux.lds.h | 2 ++
3 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 6f57cb9..8e95aa4 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -219,8 +219,8 @@ SECTIONS
__data_loc = ALIGN(4); /* location in binary */
. = PAGE_OFFSET + TEXT_OFFSET;
#else
- __init_end = .;
. = ALIGN(THREAD_SIZE);
+ __init_end = .;
__data_loc = .;
#endif
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index 97f0c04..edf8715 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -97,9 +97,9 @@ SECTIONS
PERCPU_SECTION(64)
+ . = ALIGN(PAGE_SIZE);
__init_end = .;
- . = ALIGN(PAGE_SIZE);
_data = .;
_sdata = .;
RW_DATA_SECTION(64, PAGE_SIZE, THREAD_SIZE)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 5ba0360..aa70cbd 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -40,6 +40,8 @@
* }
*
* [__init_begin, __init_end] is the init section that may be freed after init
+ * // __init_begin and __init_end should be page aligned, so that we can
+ * // free the whole .init memory
* [_stext, _etext] is the text section
* [_sdata, _edata] is the data section
*
--
2.1.0
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reply other threads:[~2014-09-16 1:47 UTC|newest]
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