diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2019-09-09 23:19:19 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-10-01 14:36:10 +0300 |
| commit | 9062c1d0bedacf68d9c92cbd62c62a6fe6f6cebc (patch) | |
| tree | bfa45005403a5a03364d3af2b69897c9463fed99 /drivers | |
| parent | 931a0ba638e09a707e9a905cb6bea1fb1c6d4183 (diff) | |
| download | linux-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')
| -rw-r--r-- | drivers/iommu/io-pgtable-arm.c | 6 |
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, }; |