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| author | Mark Rutland <mark.rutland@arm.com> | 2015-12-09 13:44:38 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-12-10 18:36:08 +0100 |
| commit | 9aa4ec1571da62366cfddc20f3b923609604fe63 (patch) | |
| tree | d7986d4eb6e16aa235215a83b5a95544c3288884 /arch/arm64/kernel/vmlinux.lds.S | |
| parent | arm64: Remove redundant padding from linker script (diff) | |
| download | linux-9aa4ec1571da62366cfddc20f3b923609604fe63.tar.xz linux-9aa4ec1571da62366cfddc20f3b923609604fe63.zip | |
arm64: mm: fold alternatives into .init
Currently we treat the alternatives separately from other data that's
only used during initialisation, using separate .altinstructions and
.altinstr_replacement linker sections. These are freed for general
allocation separately from .init*. This is problematic as:
* We do not remove execute permissions, as we do for .init, leaving the
memory executable.
* We pad between them, making the kernel Image bianry up to PAGE_SIZE
bytes larger than necessary.
This patch moves the two sections into the contiguous region used for
.init*. This saves some memory, ensures that we remove execute
permissions, and allows us to remove some code made redundant by this
reorganisation.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Jeremy Linton <jeremy.linton@arm.com>
Cc: Laura Abbott <labbott@fedoraproject.org>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/vmlinux.lds.S')
| -rw-r--r-- | arch/arm64/kernel/vmlinux.lds.S | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index a64340df2448..f943a848f844 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -140,9 +140,6 @@ SECTIONS PERCPU_SECTION(64) - . = ALIGN(PAGE_SIZE); - __init_end = .; - . = ALIGN(4); .altinstructions : { __alt_instructions = .; @@ -154,6 +151,8 @@ SECTIONS } . = ALIGN(PAGE_SIZE); + __init_end = .; + _data = .; _sdata = .; RW_DATA_SECTION(64, PAGE_SIZE, THREAD_SIZE) |