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Re: [PATCH rdma-next v3 2/3] RDMA/uverbs: Add DMABUF object type and operations

by Guenter Roeck

On Sun, Feb 01, 2026 at 04:34:05PM +0200, Edward Srouji wrote: > From: Yishai Hadas <yishaih(a)nvidia.com> > > Expose DMABUF functionality to userspace through the uverbs interface, > enabling InfiniBand/RDMA devices to export PCI based memory regions > (e.g. device memory) as DMABUF file descriptors. This allows > zero-copy sharing of RDMA memory with other subsystems that support the > dma-buf framework. > > A new UVERBS_OBJECT_DMABUF object type and allocation method were > introduced. > > During allocation, uverbs invokes the driver to supply the > rdma_user_mmap_entry associated with the given page offset (pgoff). > > Based on the returned rdma_user_mmap_entry, uverbs requests the driver > to provide the corresponding physical-memory details as well as the > driver’s PCI provider information. > > Using this information, dma_buf_export() is called; if it succeeds, > uobj->object is set to the underlying file pointer returned by the > dma-buf framework. > > The file descriptor number follows the standard uverbs allocation flow, > but the file pointer comes from the dma-buf subsystem, including its own > fops and private data. > > When an mmap entry is removed, uverbs iterates over its associated > DMABUFs, marks them as revoked, and calls dma_buf_move_notify() so that > their importers are notified. > > The same procedure applies during the disassociate flow; final cleanup > occurs when the application closes the file. > > Signed-off-by: Yishai Hadas <yishaih(a)nvidia.com> > Signed-off-by: Edward Srouji <edwards(a)nvidia.com> When trying to build powerpc:ppc64e_defconfig: ERROR: modpost: "dma_resv_wait_timeout" [drivers/infiniband/core/ib_core.ko] undefined! ERROR: modpost: "dma_buf_move_notify" [drivers/infiniband/core/ib_core.ko] undefined! ERROR: modpost: "dma_resv_reset_max_fences" [drivers/infiniband/core/ib_core.ko] undefined! The code now requires CONFIG_DMA_SHARED_BUFFER which is not enabled for this platform. Guenter

2 days, 11 hours

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2 days, 18 hours

Re: [PATCH 08/13] dt-bindings: serial: fsl-linflexuart: add clock input properties

by Krzysztof Kozlowski

On 16/02/2026 16:02, Larisa Grigore wrote: > From: Radu Pirea <radu-nicolae.pirea(a)nxp.com> > > Add optional support for the two clock inputs used by the LINFlexD UART > controller: > - "lin": LIN_BAUD_CLK > - "ipg": LINFLEXD_CLK > > The clock inputs are kept optional to maintain compatibility with the > S32V234 platform. Does S32V234 have the clocks? I don't understand the "maintain compatibility" in this context. Either you have or you have not clocks, which should be expressed in schema (: false, see example schema). > > Signed-off-by: Radu Pirea <radu-nicolae.pirea(a)nxp.com> > Co-developed-by: Larisa Grigore <larisa.grigore(a)oss.nxp.com> > Signed-off-by: Larisa Grigore <larisa.grigore(a)oss.nxp.com> > --- > .../bindings/serial/fsl,s32-linflexuart.yaml | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.yaml b/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.yaml > index 4171f524a928..885f0b1b3492 100644 > --- a/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.yaml > +++ b/Documentation/devicetree/bindings/serial/fsl,s32-linflexuart.yaml > @@ -34,6 +34,14 @@ properties: > interrupts: > maxItems: 1 > > + clocks: > + maxItems: 2 > + > + clock-names: > + items: > + - const: lin > + - const: ipg > + > required: > - compatible > - reg > @@ -48,3 +56,13 @@ examples: > reg = <0x40053000 0x1000>; > interrupts = <0 59 4>; > }; > + > + - | > + serial@401c8000 { > + compatible = "nxp,s32g2-linflexuart", > + "fsl,s32v234-linflexuart"; > + reg = <0x401C8000 0x3000>; > + interrupts = <0 82 1>; > + clocks = <&clks 14>, <&clks 13>; > + clock-names = "lin", "ipg"; Just add the clocks to existing example. No need for new example for each new property. > + }; Best regards, Krzysztof

2 days, 19 hours

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2 days, 23 hours