The current implementation of the DMA40's local MAX() macro evaluates its arguments more times than is necessary and it not type checked. This patch strips replaces it with a new, more efficient constant.
Cc: Vinod Koul <vinod.k...@intel.com> Cc: Dan Williams <d...@fb.com> Cc: Per Forlin <per.for...@stericsson.com> Cc: Rabin Vincent <ra...@rab.in> Reported-by: Harvey Harrison <harvey.harri...@gmail.com> Signed-off-by: Lee Jones <lee.jo...@linaro.org> diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index cc93416..a1984d2 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -53,8 +53,6 @@ #define D40_ALLOC_PHY BIT(30) #define D40_ALLOC_LOG_FREE 0 -#define MAX(a, b) (((a) < (b)) ? (b) : (a)) - #define D40_IS_SRC(dir) (dir == STEDMA40_PERIPH_TO_MEM) #define D40_IS_DST(dir) ((dir == STEDMA40_MEM_TO_PERIPH) || \ (dir == STEDMA40_MEM_TO_MEM)) @@ -206,6 +204,9 @@ static u32 d40_backup_regs_chan[] = { D40_CHAN_REG_SDLNK, }; +#define BACKUP_REGS_SZ_MAX ((BACKUP_REGS_SZ_V4A > BACKUP_REGS_SZ_V4B) ? \ + BACKUP_REGS_SZ_V4A : BACKUP_REGS_SZ_V4B) + /** * struct d40_interrupt_lookup - lookup table for interrupt handler * @@ -569,7 +570,7 @@ struct d40_base { resource_size_t lcpa_size; struct kmem_cache *desc_slab; u32 reg_val_backup[BACKUP_REGS_SZ]; - u32 reg_val_backup_v4[MAX(BACKUP_REGS_SZ_V4A, BACKUP_REGS_SZ_V4B)]; + u32 reg_val_backup_v4[BACKUP_REGS_SZ_MAX]; u32 *reg_val_backup_chan; u16 gcc_pwr_off_mask; bool initialized; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/