On Fri, Aug 30, 2024 at 3:35 PM Suren Baghdasaryan <surenb@xxxxxxxxxx> wrote: > > On Fri, Aug 30, 2024 at 3:12 PM Nathan Chancellor <nathan@xxxxxxxxxx> wrote: > > > > Hi Greg and Sasha, > > > > On Tue, Aug 27, 2024 at 04:37:41PM +0200, Greg Kroah-Hartman wrote: > > > 6.6-stable review patch. If anyone has any objections, please let me know. > > > > > > ------------------ > > > > > > From: Suren Baghdasaryan <surenb@xxxxxxxxxx> > > > > > > [ Upstream commit 8a2f11878771da65b8ac135c73b47dae13afbd62 ] > > > > > > After redefining alloc_pages, all uses of that name are being replaced. > > > Change the conflicting names to prevent preprocessor from replacing them > > > when it's not intended. > > > > > > Link: https://lkml.kernel.org/r/20240321163705.3067592-18-surenb@xxxxxxxxxx > > > Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx> > > > Tested-by: Kees Cook <keescook@xxxxxxxxxxxx> > > > Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx> > > > Cc: Alex Gaynor <alex.gaynor@xxxxxxxxx> > > > Cc: Alice Ryhl <aliceryhl@xxxxxxxxxx> > > > Cc: Andreas Hindborg <a.hindborg@xxxxxxxxxxx> > > > Cc: Benno Lossin <benno.lossin@xxxxxxxxx> > > > Cc: "Björn Roy Baron" <bjorn3_gh@xxxxxxxxxxxxxx> > > > Cc: Boqun Feng <boqun.feng@xxxxxxxxx> > > > Cc: Christoph Lameter <cl@xxxxxxxxx> > > > Cc: Dennis Zhou <dennis@xxxxxxxxxx> > > > Cc: Gary Guo <gary@xxxxxxxxxxx> > > > Cc: Kent Overstreet <kent.overstreet@xxxxxxxxx> > > > Cc: Miguel Ojeda <ojeda@xxxxxxxxxx> > > > Cc: Pasha Tatashin <pasha.tatashin@xxxxxxxxxx> > > > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > > Cc: Tejun Heo <tj@xxxxxxxxxx> > > > Cc: Vlastimil Babka <vbabka@xxxxxxx> > > > Cc: Wedson Almeida Filho <wedsonaf@xxxxxxxxx> > > > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > > > Stable-dep-of: 61ebe5a747da ("mm/vmalloc: fix page mapping if vm_area_alloc_pages() with high order fallback to order 0") > > > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> > > > --- > > > arch/alpha/kernel/pci_iommu.c | 2 +- > > > arch/mips/jazz/jazzdma.c | 2 +- > > > arch/powerpc/kernel/dma-iommu.c | 2 +- > > > arch/powerpc/platforms/ps3/system-bus.c | 4 ++-- > > > arch/powerpc/platforms/pseries/vio.c | 2 +- > > > arch/x86/kernel/amd_gart_64.c | 2 +- > > > drivers/iommu/dma-iommu.c | 2 +- > > > drivers/parisc/ccio-dma.c | 2 +- > > > drivers/parisc/sba_iommu.c | 2 +- > > > drivers/xen/grant-dma-ops.c | 2 +- > > > drivers/xen/swiotlb-xen.c | 2 +- > > > include/linux/dma-map-ops.h | 2 +- > > > kernel/dma/mapping.c | 4 ++-- > > > 13 files changed, 15 insertions(+), 15 deletions(-) > > > > This patch breaks the build for s390: > > > > arch/s390/pci/pci_dma.c:724:10: error: 'const struct dma_map_ops' has no member named 'alloc_pages'; did you mean 'alloc_pages_op'? > > 724 | .alloc_pages = dma_common_alloc_pages, > > | ^~~~~~~~~~~ > > | alloc_pages_op > > > > https://storage.tuxsuite.com/public/clangbuiltlinux/continuous-integration2/builds/2lNUl0tacZpSlu9Edrlk3QoSElM/build.log > > > > This change happened after commit c76c067e488c ("s390/pci: Use dma-iommu > > layer") in mainline, which explains how it was missed for stable. > > > > The fix seems simple: > > > > diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c > > index 99209085c75b..ce0f2990cb04 100644 > > --- a/arch/s390/pci/pci_dma.c > > +++ b/arch/s390/pci/pci_dma.c > > @@ -721,7 +721,7 @@ const struct dma_map_ops s390_pci_dma_ops = { > > .unmap_page = s390_dma_unmap_pages, > > .mmap = dma_common_mmap, > > .get_sgtable = dma_common_get_sgtable, > > - .alloc_pages = dma_common_alloc_pages, > > + .alloc_pages_op = dma_common_alloc_pages, > > .free_pages = dma_common_free_pages, > > /* dma_supported is unconditionally true without a callback */ > > }; > > > > but I think the better question is why this patch is even needed in the > > first place? It claims that it is a stable dependency of 61ebe5a747da > > but this patch does not even touch mm/vmalloc.c and 61ebe5a747da does > > not mention or touch anything with alloc_pages_op, so it seems like this > > change should just be reverted from 6.6? > > Hmm, Nathan is right. I don't see any dependency between this patch > and 61ebe5a747da. Maybe some other patch that uses .alloc_pages_op got > backported and that caused a dependency but then that other patch > should be changed to use .alloc_pages. I'm syncing stable 6.6 to > check. Thanks for pointing this out Nathan! I reverted this patch in stable 6.6 and there is no code using alloc_pages_op. We should just drop this patch (983e6b2636f0099dbac1874c9e885bbe1cf2df05) from stable 6.6. Sorry for not noticing this in the first place. Thanks, Suren. > > > > > > Cheers, > > Nathan
