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Date: Thu, 10 Dec 2020 20:25:38 +0100 From: Thomas Gleixner <tglx@...utronix.de> To: LKML <linux-kernel@...r.kernel.org> Cc: Peter Zijlstra <peterz@...radead.org>, Marc Zyngier <maz@...nel.org>, "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, Helge Deller <deller@....de>, afzal mohammed <afzal.mohd.ma@...il.com>, linux-parisc@...r.kernel.org, Russell King <linux@...linux.org.uk>, linux-arm-kernel@...ts.infradead.org, Mark Rutland <mark.rutland@....com>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, Christian Borntraeger <borntraeger@...ibm.com>, Heiko Carstens <hca@...ux.ibm.com>, linux-s390@...r.kernel.org, Jani Nikula <jani.nikula@...ux.intel.com>, Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>, David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>, Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@...el.com>, Chris Wilson <chris@...is-wilson.co.uk>, Wambui Karuga <wambui.karugax@...il.com>, intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>, Linus Walleij <linus.walleij@...aro.org>, linux-gpio@...r.kernel.org, Lee Jones <lee.jones@...aro.org>, Jon Mason <jdmason@...zu.us>, Dave Jiang <dave.jiang@...el.com>, Allen Hubbe <allenbh@...il.com>, linux-ntb@...glegroups.com, Lorenzo Pieralisi <lorenzo.pieralisi@....com>, Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, Michal Simek <michal.simek@...inx.com>, linux-pci@...r.kernel.org, Karthikeyan Mitran <m.karthikeyan@...iveil.co.in>, Hou Zhiqiang <Zhiqiang.Hou@....com>, Tariq Toukan <tariqt@...dia.com>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org, linux-rdma@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Juergen Gross <jgross@...e.com>, Stefano Stabellini <sstabellini@...nel.org>, xen-devel@...ts.xenproject.org Subject: [patch 02/30] genirq: Move status flag checks to core These checks are used by modules and prevent the removal of the export of irq_to_desc(). Move the accessor into the core. Signed-off-by: Thomas Gleixner <tglx@...utronix.de> --- include/linux/irqdesc.h | 17 +++++------------ kernel/irq/manage.c | 17 +++++++++++++++++ 2 files changed, 22 insertions(+), 12 deletions(-) --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -223,28 +223,21 @@ irq_set_chip_handler_name_locked(struct data->chip = chip; } +bool irq_check_status_bit(unsigned int irq, unsigned int bitmask); + static inline bool irq_balancing_disabled(unsigned int irq) { - struct irq_desc *desc; - - desc = irq_to_desc(irq); - return desc->status_use_accessors & IRQ_NO_BALANCING_MASK; + return irq_check_status_bit(irq, IRQ_NO_BALANCING_MASK); } static inline bool irq_is_percpu(unsigned int irq) { - struct irq_desc *desc; - - desc = irq_to_desc(irq); - return desc->status_use_accessors & IRQ_PER_CPU; + return irq_check_status_bit(irq, IRQ_PER_CPU); } static inline bool irq_is_percpu_devid(unsigned int irq) { - struct irq_desc *desc; - - desc = irq_to_desc(irq); - return desc->status_use_accessors & IRQ_PER_CPU_DEVID; + return irq_check_status_bit(irq, IRQ_PER_CPU_DEVID); } static inline void --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -2769,3 +2769,23 @@ bool irq_has_action(unsigned int irq) return res; } EXPORT_SYMBOL_GPL(irq_has_action); + +/** + * irq_check_status_bit - Check whether bits in the irq descriptor status are set + * @irq: The linux irq number + * @bitmask: The bitmask to evaluate + * + * Returns: True if one of the bits in @bitmask is set + */ +bool irq_check_status_bit(unsigned int irq, unsigned int bitmask) +{ + struct irq_desc *desc; + bool res = false; + + rcu_read_lock(); + desc = irq_to_desc(irq); + if (desc) + res = !!(desc->status_use_accessors & bitmask); + rcu_read_unlock(); + return res; +}
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