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| author | Mikulas Patocka <mpatocka@redhat.com> | 2018-06-03 16:41:01 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2018-07-31 08:11:12 +1000 |
| commit | 58cba7c222e8c87bb6b61fcba21d1536145221b0 (patch) | |
| tree | a3996ae88be6b5ed459ec0c08ed37bd24d55bb3f /drivers | |
| parent | 91ba11fb7d7ca0a3bbe8a512e65e666e2ec1e889 (diff) | |
| download | linux-58cba7c222e8c87bb6b61fcba21d1536145221b0.tar.gz | |
udl-kms: avoid prefetch
Modern processors can detect linear memory accesses and prefetch data automatically, so there's no need to use prefetch. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_transfer.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/drivers/gpu/drm/udl/udl_transfer.c b/drivers/gpu/drm/udl/udl_transfer.c index f3331d33547a..ce87661e544f 100644 --- a/drivers/gpu/drm/udl/udl_transfer.c +++ b/drivers/gpu/drm/udl/udl_transfer.c @@ -13,7 +13,6 @@ #include <linux/module.h> #include <linux/slab.h> #include <linux/fb.h> -#include <linux/prefetch.h> #include <asm/unaligned.h> #include <drm/drmP.h> @@ -51,9 +50,6 @@ static int udl_trim_hline(const u8 *bback, const u8 **bfront, int *width_bytes) int start = width; int end = width; - prefetch((void *) front); - prefetch((void *) back); - for (j = 0; j < width; j++) { if (back[j] != front[j]) { start = j; @@ -140,8 +136,6 @@ static void udl_compress_hline16( const u8 *cmd_pixel_start, *cmd_pixel_end = NULL; uint16_t pixel_val16; - prefetchw((void *) cmd); /* pull in one cache line at least */ - *cmd++ = 0xaf; *cmd++ = 0x6b; *cmd++ = (uint8_t) ((dev_addr >> 16) & 0xFF); @@ -158,7 +152,6 @@ static void udl_compress_hline16( (unsigned long)(pixel_end - pixel) >> log_bpp, (unsigned long)(cmd_buffer_end - 1 - cmd) / 2) << log_bpp); - prefetch_range((void *) pixel, cmd_pixel_end - pixel); pixel_val16 = get_pixel_val16(pixel, log_bpp); while (pixel < cmd_pixel_end) { |