diff options
| author | Christoph Hellwig <[email protected]> | 2023-10-17 16:04:42 +0200 |
|---|---|---|
| committer | Christoph Hellwig <[email protected]> | 2023-10-22 16:38:54 +0200 |
| commit | 9e28bf8bdf2177a88bd6648fc741bc0280e08af8 (patch) | |
| tree | 48d0dcc3c9d4d37994651d2a78bdc076a4c1f1cd /arch/m68k/kernel/dma.c | |
| parent | 63f067e33c996a6e4d9a34d138116a43105182f1 (diff) | |
m68k: use the coherent DMA code for coldfire without data cache
Coldfire cores configured without a data cache are DMA coherent and
should thus simply use the simple coherent version of dma-direct.
Introduce a new COLDFIRE_COHERENT_DMA Kconfig symbol as a convenient
short hand for such configurations, and a M68K_NONCOHERENT_DMA symbol
for all cases where we need to build non-coherent DMA infrastructure
to simplify the Kconfig and code conditionals.
Not building the non-coherent DMA code slightly reduces the code
size for such configurations.
Numers for m5249evb_defconfig below:
text data bss dec hex filename
2896158 401052 65392 3362602 334f2a vmlinux.before
2895166 400988 65392 3361546 334b0a vmlinux.after
Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Greg Ungerer <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Tested-by: Greg Ungerer <[email protected]>
Diffstat (limited to 'arch/m68k/kernel/dma.c')
| -rw-r--r-- | arch/m68k/kernel/dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c index 2e192a5df949..f83870cfa79b 100644 --- a/arch/m68k/kernel/dma.c +++ b/arch/m68k/kernel/dma.c @@ -17,7 +17,7 @@ #include <asm/cacheflush.h> -#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE) +#ifndef CONFIG_COLDFIRE void arch_dma_prep_coherent(struct page *page, size_t size) { cache_push(page_to_phys(page), size); |