On 11/3/23 00:37, Greg Kroah-Hartman wrote:
From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> [ Upstream commit 9b07d27d0fbb7f7441aa986859a0f53ec93a0335 ] swiotlb_memblock_alloc() calls memblock_alloc(), which calls (__init) memblock_alloc_try_nid(). However, swiotlb_membloc_alloc() can be marked as __init since it is only called by swiotlb_init_remap(), which is already marked as __init. This prevents a modpost build warning/error: WARNING: modpost: vmlinux.o: section mismatch in reference: swiotlb_memblock_alloc (section: .text) -> memblock_alloc_try_nid (section: .init.text) WARNING: modpost: vmlinux.o: section mismatch in reference: swiotlb_memblock_alloc (section: .text) -> memblock_alloc_try_nid (section: .init.text) This fixes the build warning/error seen on ARM64, PPC64, S390, i386, and x86_64.
Did you do something special in your config to get these warnings? Or it is your toolchain? I tested with whatever comes with Ubuntu2210 and Fedora36 and neither printed the warning and I want to see those :-/ Thanks,
Fixes: 8d58aa484920 ("swiotlb: reduce the swiotlb buffer size on allocation failure") Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Cc: Alexey Kardashevskiy <aik@xxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Cc: iommu@xxxxxxxxxxxxxxx Cc: Mike Rapoport <rppt@xxxxxxxxxx> Cc: linux-mm@xxxxxxxxx Signed-off-by: Christoph Hellwig <hch@xxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- kernel/dma/swiotlb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index a34c38bbe28f1..ef3bc3a5bbed3 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -300,7 +300,8 @@ static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, return; }-static void *swiotlb_memblock_alloc(unsigned long nslabs, unsigned int flags,+static void __init *swiotlb_memblock_alloc(unsigned long nslabs, + unsigned int flags, int (*remap)(void *tlb, unsigned long nslabs)) { size_t bytes = PAGE_ALIGN(nslabs << IO_TLB_SHIFT);
-- Alexey
