[PATCH] swiotlb uninlinings (be6b0267) · Commits · 戴 / test

Optimise swiotlb.c for size. text data bss dec hex filename 5009 89 64 5162 142a lib/swiotlb.o-before 4666 89 64 4819 12d3 lib/swiotlb.o-after For some reason my gcc (4.0.2) doesn't want to tailcall these things. swiotlb_sync_sg_for_device: pushq %rbp # movl $1, %r8d #, movq %rsp, %rbp #, call swiotlb_sync_sg # leave ret .size swiotlb_sync_sg_for_device, .-swiotlb_sync_sg_for_device .section .text.swiotlb_sync_sg_for_cpu,"ax",@progbits .globl swiotlb_sync_sg_for_cpu .type swiotlb_sync_sg_for_cpu, @function swiotlb_sync_sg_for_cpu: pushq %rbp # xorl %r8d, %r8d # movq %rsp, %rbp #, call swiotlb_sync_sg # leave ret Cc: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <ak@suse.de> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

lib/swiotlb.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -313,7 +313,7 @@ cleanup1:
		#endif

		#ifndef SWIOTLB_ARCH_HAS_NEEDS_MAPPING
		static inline int
		static int
		address_needs_mapping(struct device *hwdev, dma_addr_t addr)
		{
		dma_addr_t mask = 0xffffffff;
		@@ -672,7 +672,7 @@ swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size,
		* address back to the card, you must first perform a
		* swiotlb_dma_sync_for_device, and then the device again owns the buffer
		*/
		static inline void
		static void
		swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
		size_t size, int dir, int target)
		{
		@@ -702,7 +702,7 @@ swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
		/*
		* Same as above, but for a sub-range of the mapping.
		*/
		static inline void
		static void
		swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr,
		unsigned long offset, size_t size,
		int dir, int target)
		@@ -805,7 +805,7 @@ swiotlb_unmap_sg(struct device hwdev, struct scatterlist sg, int nelems,
		* The same as swiotlb_sync_single_* but for a scatter-gather list, same rules
		* and usage.
		*/
		static inline void
		static void
		swiotlb_sync_sg(struct device hwdev, struct scatterlist sg,
		int nelems, int dir, int target)
		{

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