This series implements bounce buffer support to handle vmalloc'd buffers in case of drivers use DMA, similar to what is done in MTD NAND framework. I have tested this on two platform: DRA74 SoC (cortex a15 @1GHz) with s25fl256s1 QSPI (SPI bus frequency 76.8 MHz) and I don't see any performance degradation with UBIFS read/write(10MB file). AM437x SoC (cortex a9 @1GHz) with macronix mx66l51235l QSPI flash (SPI bus frequency 48MHz) and performance degradation is <4% for UBIFS. Vignesh R (2): mtd: spi-nor: Introduce bounce buffer to handle vmalloc'd buffers mtd: devices: m25p80: Enable spi-nor bounce buffer support drivers/mtd/devices/m25p80.c | 1 + drivers/mtd/spi-nor/spi-nor.c | 30 +++++++++++++++++++++++++++--- include/linux/mtd/spi-nor.h | 4 ++++ 3 files changed, 32 insertions(+), 3 deletions(-) -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
