From f146c7bc85a51f95c05e0f8173d484eb301ece78 Mon Sep 17 00:00:00 2001 From: Danilo Krummrich Date: Thu, 13 Aug 2026 18:52:04 +0200 Subject: PCI: Add pci_irq_type() to query the allocated interrupt type Add a helper that returns PCI_IRQ_MSIX, PCI_IRQ_MSI, or PCI_IRQ_INTX based on the interrupt type the PCI core selected after pci_alloc_irq_vectors(). Several drivers already open-code this check against pdev->msix_enabled and pdev->msi_enabled, or even open code this helper [1]. A common helper avoids the duplication and keeps drivers from accessing the bitfield directly (see also [2]). Acked-by: Bjorn Helgaas Tested-by: John Hubbard Link: https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196 [1] Inspired-by: John Hubbard Link: https://lore.kernel.org/all/DKKG2QM3YJYB.Z2H2B2UXJ75N@kernel.org/ [2] Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260813165234.620555-5-dakr@kernel.org [ Add missing pci_irq_type() stub for CONFIG_PCI=n. ] Signed-off-by: Danilo Krummrich --- tools/perf/util/rwsem.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 tools/perf/util/rwsem.h (limited to 'tools/perf/util/rwsem.h') diff --git a/tools/perf/util/rwsem.h b/tools/perf/util/rwsem.h new file mode 100644 index 000000000..b102d8143 --- /dev/null +++ b/tools/perf/util/rwsem.h @@ -0,0 +1,30 @@ +#ifndef _PERF_RWSEM_H +#define _PERF_RWSEM_H + +#include +#include "mutex.h" + +/* + * Mutexes have additional error checking. Enable to use a mutex rather than a + * rwlock for debugging. + */ +#define RWS_ERRORCHECK 0 + +struct LOCKABLE rw_semaphore { +#if RWS_ERRORCHECK + struct mutex mtx; +#else + pthread_rwlock_t lock; +#endif +}; + +int init_rwsem(struct rw_semaphore *sem); +int exit_rwsem(struct rw_semaphore *sem); + +int down_read(struct rw_semaphore *sem) SHARED_LOCK_FUNCTION(sem); +int up_read(struct rw_semaphore *sem) UNLOCK_FUNCTION(sem); + +int down_write(struct rw_semaphore *sem) EXCLUSIVE_LOCK_FUNCTION(sem); +int up_write(struct rw_semaphore *sem) UNLOCK_FUNCTION(sem); + +#endif /* _PERF_RWSEM_H */ -- cgit v1.3.1