diff options
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 21 | ||||
| -rw-r--r-- | arch/arm/mm/init.c | 10 | ||||
| -rw-r--r-- | arch/arm/mm/nommu.c | 5 |
3 files changed, 8 insertions, 28 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index fcf1473d6fed..ada8eb206a90 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -382,9 +382,9 @@ static void __dma_free_remap(void *cpu_addr, size_t size) } #define DEFAULT_DMA_COHERENT_POOL_SIZE SZ_256K -static struct gen_pool *atomic_pool; +static struct gen_pool *atomic_pool __ro_after_init; -static size_t atomic_pool_size = DEFAULT_DMA_COHERENT_POOL_SIZE; +static size_t atomic_pool_size __initdata = DEFAULT_DMA_COHERENT_POOL_SIZE; static int __init early_coherent_pool(char *p) { @@ -393,21 +393,6 @@ static int __init early_coherent_pool(char *p) } early_param("coherent_pool", early_coherent_pool); -void __init init_dma_coherent_pool_size(unsigned long size) -{ - /* - * Catch any attempt to set the pool size too late. - */ - BUG_ON(atomic_pool); - - /* - * Set architecture specific coherent pool size only if - * it has not been changed by kernel command line parameter. - */ - if (atomic_pool_size == DEFAULT_DMA_COHERENT_POOL_SIZE) - atomic_pool_size = size; -} - /* * Initialise the coherent pool for atomic allocations. */ @@ -443,7 +428,7 @@ static int __init atomic_pool_init(void) gen_pool_set_algo(atomic_pool, gen_pool_first_fit_order_align, - (void *)PAGE_SHIFT); + NULL); pr_info("DMA: preallocated %zu KiB pool for atomic coherent allocations\n", atomic_pool_size / 1024); return 0; diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index ad80548325fe..81d4482b6861 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -580,16 +580,6 @@ void __init mem_init(void) BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); #endif - - if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) { - extern int sysctl_overcommit_memory; - /* - * On a machine this small we won't get - * anywhere without overcommit, so turn - * it on by default. - */ - sysctl_overcommit_memory = OVERCOMMIT_ALWAYS; - } } #ifdef CONFIG_STRICT_KERNEL_RWX diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c index 3b8e728cc944..91537d90f5f5 100644 --- a/arch/arm/mm/nommu.c +++ b/arch/arm/mm/nommu.c @@ -344,6 +344,11 @@ void __init arm_mm_memblock_reserve(void) * reserved here. */ #endif + /* + * In any case, always ensure address 0 is never used as many things + * get very confused if 0 is returned as a legitimate address. + */ + memblock_reserve(0, 1); } void __init adjust_lowmem_bounds(void) |