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authorChristophe JAILLET <christophe.jaillet@wanadoo.fr>2019-09-09 23:19:19 +0300
committerWill Deacon <will@kernel.org>2019-10-01 14:36:10 +0300
commit9062c1d0bedacf68d9c92cbd62c62a6fe6f6cebc (patch)
treebfa45005403a5a03364d3af2b69897c9463fed99 /drivers/iommu/io-pgtable-arm.c
parent931a0ba638e09a707e9a905cb6bea1fb1c6d4183 (diff)
downloadlinux-9062c1d0bedacf68d9c92cbd62c62a6fe6f6cebc.tar.xz
iommu/io-pgtable: Move some initialization data to .init.rodata
The memory used by '__init' functions can be freed once the initialization phase has been performed. Mark some 'static const' array defined and used within some '__init' functions as '__initconst', so that the corresponding data can also be discarded. Without '__initconst', the data are put in the .rodata section. With the qualifier, they are put in the .init.rodata section. With gcc 8.3.0, the following changes have been measured: Without '__initconst': section size .rodata 00000720 .init.rodata 00000018 With '__initconst': section size .rodata 00000660 .init.rodata 00000058 Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu/io-pgtable-arm.c')
-rw-r--r--drivers/iommu/io-pgtable-arm.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
index 4c91359057c5..a743a2601334 100644
--- a/drivers/iommu/io-pgtable-arm.c
+++ b/drivers/iommu/io-pgtable-arm.c
@@ -1113,7 +1113,7 @@ static void __init arm_lpae_dump_ops(struct io_pgtable_ops *ops)
static int __init arm_lpae_run_tests(struct io_pgtable_cfg *cfg)
{
- static const enum io_pgtable_fmt fmts[] = {
+ static const enum io_pgtable_fmt fmts[] __initconst = {
ARM_64_LPAE_S1,
ARM_64_LPAE_S2,
};
@@ -1212,13 +1212,13 @@ static int __init arm_lpae_run_tests(struct io_pgtable_cfg *cfg)
static int __init arm_lpae_do_selftests(void)
{
- static const unsigned long pgsize[] = {
+ static const unsigned long pgsize[] __initconst = {
SZ_4K | SZ_2M | SZ_1G,
SZ_16K | SZ_32M,
SZ_64K | SZ_512M,
};
- static const unsigned int ias[] = {
+ static const unsigned int ias[] __initconst = {
32, 36, 40, 42, 44, 48,
};