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| author | Mike Rapoport <rppt@linux.ibm.com> | 2019-03-08 03:31:06 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-08 05:32:03 +0300 |
| commit | b63a07d69d404435125e77286620891ef8f9d719 (patch) | |
| tree | 9c6d64b7868c4215b0e7c242267a2ba90ceacd1b /arch/c6x/mm/dma-coherent.c | |
| parent | 1e8ffd50fd201d05b3de97858ce6868cf774b4a8 (diff) | |
| download | linux-b63a07d69d404435125e77286620891ef8f9d719.tar.xz | |
arch: simplify several early memory allocations
There are several early memory allocations in arch/ code that use
memblock_phys_alloc() to allocate memory, convert the returned physical
address to the virtual address and then set the allocated memory to
zero.
Exactly the same behaviour can be achieved simply by calling
memblock_alloc(): it allocates the memory in the same way as
memblock_phys_alloc(), then it performs the phys_to_virt() conversion
and clears the allocated memory.
Replace the longer sequence with a simpler call to memblock_alloc().
Link: http://lkml.kernel.org/r/1546248566-14910-6-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/c6x/mm/dma-coherent.c')
| -rw-r--r-- | arch/c6x/mm/dma-coherent.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/arch/c6x/mm/dma-coherent.c b/arch/c6x/mm/dma-coherent.c index 75b79571732c..0be289839ce0 100644 --- a/arch/c6x/mm/dma-coherent.c +++ b/arch/c6x/mm/dma-coherent.c @@ -121,8 +121,6 @@ void arch_dma_free(struct device *dev, size_t size, void *vaddr, */ void __init coherent_mem_init(phys_addr_t start, u32 size) { - phys_addr_t bitmap_phys; - if (!size) return; @@ -138,11 +136,8 @@ void __init coherent_mem_init(phys_addr_t start, u32 size) if (dma_size & (PAGE_SIZE - 1)) ++dma_pages; - bitmap_phys = memblock_phys_alloc(BITS_TO_LONGS(dma_pages) * sizeof(long), - sizeof(long)); - - dma_bitmap = phys_to_virt(bitmap_phys); - memset(dma_bitmap, 0, dma_pages * PAGE_SIZE); + dma_bitmap = memblock_alloc(BITS_TO_LONGS(dma_pages) * sizeof(long), + sizeof(long)); } static void c6x_dma_sync(struct device *dev, phys_addr_t paddr, size_t size, |