kernel/git/stable/linux.git/drivers/s390/cio/airq.c, branch master

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

s390/drivers: Explicitly include

2025-06-17T16:18:02+00:00

Explicitly include in files which contain an EXPORT_SYMBOL(). See commit a934a57a42f6 ("scripts/misc-check: check missing #include when W=1") for more details. Acked-by: Alexander Gordeev Signed-off-by: Heiko Carstens Signed-off-by: Alexander Gordeev

s390/irq: Set CIF_NOHZ_DELAY in do_io_irq()

2024-05-14T18:19:46+00:00

Both do_airq_interrupt() and do_io_interrupt() set CIF_NOHZ_DELAY. Move it to do_io_irq() to simplify the code. Reviewed-by: Heiko Carstens Signed-off-by: Sven Schnelle Signed-off-by: Alexander Gordeev

s390/airq: remove lsi_mask from airq_struct

2023-08-30T09:03:28+00:00

Remove the field `lsi_mask` from `struct airq_struct` as it is not utilized for any adapter interrupt, other than setting it to the default value of 0xff. Because nobody is using this functionality, all it does is cost a little bit of time with each delivered adapter interrupt. Reviewed-by: Michael Mueller Tested-by: Michael Mueller Acked-by: Peter Oberparleiter Signed-off-by: Benjamin Block Signed-off-by: Heiko Carstens

s390/airq: allow for airq structure that uses an input vector

2022-07-11T07:54:15+00:00

When doing device passthrough where interrupts are being forwarded from host to guest, we wish to use a pinned section of guest memory as the vector (the same memory used by the guest as the vector). To accomplish this, add a new parameter for airq_iv_create which allows passing an existing vector to be used instead of allocating a new one. The caller is responsible for ensuring the vector is pinned in memory as well as for unpinning the memory when the vector is no longer needed. A subsequent patch will use this new parameter for zPCI interpretation. Reviewed-by: Thomas Huth Reviewed-by: Pierre Morel Reviewed-by: Claudio Imbrenda Acked-by: Cornelia Huck Signed-off-by: Matthew Rosato Link: https://lore.kernel.org/r/20220606203325.110625-7-mjrosato@linux.ibm.com Signed-off-by: Christian Borntraeger

s390/airq: pass more TPI info to airq handlers

2022-07-11T07:54:10+00:00

A subsequent patch will introduce an airq handler that requires additional TPI information beyond directed vs floating, so pass the entire tpi_info structure via the handler. Only pci actually uses this information today, for the other airq handlers this is effectively a no-op. Reviewed-by: Eric Farman Reviewed-by: Claudio Imbrenda Reviewed-by: Pierre Morel Reviewed-by: Thomas Huth Acked-by: Christian Borntraeger Acked-by: Cornelia Huck Signed-off-by: Matthew Rosato Link: https://lore.kernel.org/r/20220606203325.110625-6-mjrosato@linux.ibm.com Signed-off-by: Christian Borntraeger

s390/airq: use DMA memory for summary indicators

2022-03-07T23:33:00+00:00

Protected virtualization guests have to use shared pages for airq notifier bit vectors and summary bytes or bits, thus these need to be allocated as DMA coherent memory. Commit b50623e5db80 ("s390/airq: use DMA memory for adapter interrupts") took care of the notifier bit vectors, but omitted to take care of the summary bytes/bits. In practice this omission is not a big deal, because the summary ain't necessarily allocated here, but can be supplied by the driver. Currently all the I/O we have for SE guests is virtio-ccw, and virtio-ccw uses a self-allocated array of summary indicators. Let us cover all our bases nevertheless! Signed-off-by: Halil Pasic Reviewed-by: Harald Freudenberger Signed-off-by: Vasily Gorbik

s390: add struct tpi_info to struct pt_regs

2021-06-07T15:07:01+00:00

To avoid casting ptrace members, add a union containing both struct tpi_info and explicit int_code/int_parm members. Signed-off-by: Sven Schnelle Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/irq: replace setup_irq() by request_irq()

2020-03-11T13:18:44+00:00

request_irq() is preferred over setup_irq(). Invocations of setup_irq() occur after memory allocators are ready. Per tglx[1], setup_irq() existed in olden days when allocators were not ready by the time early interrupts were initialized. Hence replace setup_irq() by request_irq(). [1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos Signed-off-by: afzal mohammed Message-Id: <20200304005049.5291-1-afzal.mohd.ma@gmail.com> [heiko.carstens@de.ibm.com: replace pr_err with panic] Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik