From davej@redhat.com Mon Aug 8 21:21:12 2005 Date: Tue, 9 Aug 2005 00:20:10 -0400 From: Dave Jones To: Greg Kroah-Hartman Cc: arjanv@redhat.com Subject: must_check attributes for PCI layer. Message-ID: <20050809042010.GA3808@redhat.com> Self explanatory really. Some newer gcc's print a warning if a function is used and we don't check its result. We do this for a bunch of things in the kernel already, this extends that to the PCI layer. Based on a patch originally from Arjan van de Ven. Signed-off-by: Dave Jones Signed-off-by: Arjan van de Ven Signed-off-by: Greg Kroah-Hartman --- include/linux/pci.h | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) --- gregkh-2.6.orig/include/linux/pci.h 2005-08-19 00:22:25.000000000 -0700 +++ gregkh-2.6/include/linux/pci.h 2005-08-19 00:22:26.000000000 -0700 @@ -376,32 +376,32 @@ static inline int pci_write_config_dword return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val); } -int pci_enable_device(struct pci_dev *dev); -int pci_enable_device_bars(struct pci_dev *dev, int mask); +int __must_check pci_enable_device(struct pci_dev *dev); +int __must_check pci_enable_device_bars(struct pci_dev *dev, int mask); void pci_disable_device(struct pci_dev *dev); void pci_set_master(struct pci_dev *dev); #define HAVE_PCI_SET_MWI -int pci_set_mwi(struct pci_dev *dev); +int __must_check pci_set_mwi(struct pci_dev *dev); void pci_clear_mwi(struct pci_dev *dev); void pci_intx(struct pci_dev *dev, int enable); -int pci_set_dma_mask(struct pci_dev *dev, u64 mask); -int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask); +int __must_check pci_set_dma_mask(struct pci_dev *dev, u64 mask); +int __must_check pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask); void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno); int pci_assign_resource(struct pci_dev *dev, int i); void pci_restore_bars(struct pci_dev *dev); /* ROM control related routines */ -void __iomem *pci_map_rom(struct pci_dev *pdev, size_t *size); -void __iomem *pci_map_rom_copy(struct pci_dev *pdev, size_t *size); +void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size); +void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size); void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom); void pci_remove_rom(struct pci_dev *pdev); /* Power management related routines */ int pci_save_state(struct pci_dev *dev); int pci_restore_state(struct pci_dev *dev); -int pci_set_power_state(struct pci_dev *dev, pci_power_t state); -pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state); -int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable); +int __must_check pci_set_power_state(struct pci_dev *dev, pci_power_t state); +pci_power_t __must_check pci_choose_state(struct pci_dev *dev, pm_message_t state); +int __must_check pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable); /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */ void pci_bus_assign_resources(struct pci_bus *bus);