[PATCH v2] arm:extend __init_end to a page align address
From: Wang, Yalin <hidden>
Date: 2014-09-16 01:47:13
Also in:
linux-mm, lkml
Subsystem:
arm port, arm64 port (aarch64 architecture), generic include/asm header files, the rest · Maintainers:
Russell King, Catalin Marinas, Will Deacon, Arnd Bergmann, Linus Torvalds
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 <redacted> --- 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