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.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 tools/perf/util/rwsem.c (limited to 'tools/perf/util/rwsem.c') diff --git a/tools/perf/util/rwsem.c b/tools/perf/util/rwsem.c new file mode 100644 index 000000000..9d2683239 --- /dev/null +++ b/tools/perf/util/rwsem.c @@ -0,0 +1,71 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "util.h" +#include "rwsem.h" + +#if RWS_ERRORCHECK +#include "mutex.h" +#endif + +int init_rwsem(struct rw_semaphore *sem) +{ +#if RWS_ERRORCHECK + mutex_init(&sem->mtx); + return 0; +#else + return pthread_rwlock_init(&sem->lock, NULL); +#endif +} + +int exit_rwsem(struct rw_semaphore *sem) +{ +#if RWS_ERRORCHECK + mutex_destroy(&sem->mtx); + return 0; +#else + return pthread_rwlock_destroy(&sem->lock); +#endif +} + +int down_read(struct rw_semaphore *sem) + NO_THREAD_SAFETY_ANALYSIS +{ +#if RWS_ERRORCHECK + mutex_lock(&sem->mtx); + return 0; +#else + return perf_singlethreaded ? 0 : pthread_rwlock_rdlock(&sem->lock); +#endif +} + +int up_read(struct rw_semaphore *sem) + NO_THREAD_SAFETY_ANALYSIS +{ +#if RWS_ERRORCHECK + mutex_unlock(&sem->mtx); + return 0; +#else + return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock); +#endif +} + +int down_write(struct rw_semaphore *sem) + NO_THREAD_SAFETY_ANALYSIS +{ +#if RWS_ERRORCHECK + mutex_lock(&sem->mtx); + return 0; +#else + return perf_singlethreaded ? 0 : pthread_rwlock_wrlock(&sem->lock); +#endif +} + +int up_write(struct rw_semaphore *sem) + NO_THREAD_SAFETY_ANALYSIS +{ +#if RWS_ERRORCHECK + mutex_unlock(&sem->mtx); + return 0; +#else + return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock); +#endif +} -- cgit v1.3.1