On 9/20/21 10:17 AM, gregkh@linuxfoundation.org wrote:

This is a note to let you know that I've just added the patch titled

 parisc: Declare pci_iounmap() parisc version only when CONFIG_PCI enabled

to the 5.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: parisc-declare-pci_iounmap-parisc-version-only-when-config_pci-enabled.patch and it can be found in the queue-5.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

No, please don't add it to any stable tree yet. This patch was applied by Linus in order to fix build errors on the alpha architecture, but it triggers build errors on arm64 (and maybe other arches). The whole issue is still being analyzed, as visible in e.g. this commit:

316e8d79a0959c302b0c462ab64b069599f10eef Author: Linus Torvalds torvalds@linux-foundation.org Date: Sun Sep 19 17:13:35 2021 -0700 pci_iounmap'2: Electric Boogaloo: try to make sense of it all

Helge

From 9caea0007601d3bc6debec04f8b4cd6f4c2394be Mon Sep 17 00:00:00 2001 From: Helge Deller deller@gmx.de Date: Sun, 19 Sep 2021 10:36:09 -0700 Subject: parisc: Declare pci_iounmap() parisc version only when CONFIG_PCI enabled

From: Helge Deller deller@gmx.de

commit 9caea0007601d3bc6debec04f8b4cd6f4c2394be upstream.

Linus noticed odd declaration rules for pci_iounmap() in iomap.h and pci_iomap.h, where it dependend on either NO_GENERIC_PCI_IOPORT_MAP or GENERIC_IOMAP when CONFIG_PCI was disabled.

Testing on parisc seems to indicate that we need pci_iounmap() only when CONFIG_PCI is enabled, so the declaration of pci_iounmap() can be moved cleanly into pci_iomap.h in sync with the declarations of pci_iomap().

Link: https://lore.kernel.org/all/CAHk-=wjRrh98pZoQ+AzfWmsTZacWxTJKXZ9eKU2X_0+jM=O... Signed-off-by: Helge Deller deller@gmx.de Suggested-by: Linus Torvalds torvalds@linux-foundation.org Fixes: 97a29d59fc22 ("[PARISC] fix compile break caused by iomap: make IOPORT/PCI mapping functions conditional") Cc: Arnd Bergmann arnd@arndb.de Cc: Guenter Roeck linux@roeck-us.net Cc: Ulrich Teichert krypton@ulrich-teichert.org Cc: James Bottomley James.Bottomley@hansenpartnership.com Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

---

arch/parisc/lib/iomap.c | 4 +++- include/asm-generic/iomap.h | 10 ---------- include/asm-generic/pci_iomap.h | 3 +++ 3 files changed, 6 insertions(+), 11 deletions(-)

--- a/arch/parisc/lib/iomap.c +++ b/arch/parisc/lib/iomap.c @@ -513,12 +513,15 @@ void ioport_unmap(void __iomem *addr) } }

+#ifdef CONFIG_PCI void pci_iounmap(struct pci_dev *dev, void __iomem * addr) { if (!INDIRECT_ADDR(addr)) { iounmap(addr); } } +EXPORT_SYMBOL(pci_iounmap); +#endif

EXPORT_SYMBOL(ioread8); EXPORT_SYMBOL(ioread16); @@ -544,4 +547,3 @@ EXPORT_SYMBOL(iowrite16_rep); EXPORT_SYMBOL(iowrite32_rep); EXPORT_SYMBOL(ioport_map); EXPORT_SYMBOL(ioport_unmap); -EXPORT_SYMBOL(pci_iounmap); --- a/include/asm-generic/iomap.h +++ b/include/asm-generic/iomap.h @@ -110,16 +110,6 @@ static inline void __iomem *ioremap_np(p } #endif

-#ifdef CONFIG_PCI -/* Destroy a virtual mapping cookie for a PCI BAR (memory or IO) */ -struct pci_dev; -extern void pci_iounmap(struct pci_dev *dev, void __iomem *); -#elif defined(CONFIG_GENERIC_IOMAP) -struct pci_dev; -static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) -{ } -#endif

• #include <asm-generic/pci_iomap.h>

  #endif

--- a/include/asm-generic/pci_iomap.h +++ b/include/asm-generic/pci_iomap.h @@ -18,6 +18,7 @@ extern void __iomem *pci_iomap_range(str extern void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar, unsigned long offset, unsigned long maxlen); +extern void pci_iounmap(struct pci_dev *dev, void __iomem *); /* Create a virtual mapping cookie for a port on a given PCI device.

• Do not call this directly, it exists to make it easier for architectures
• to override */

@@ -50,6 +51,8 @@ static inline void __iomem *pci_iomap_wc { return NULL; } +static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) +{ } #endif

#endif /* __ASM_GENERIC_IO_H */

Patches currently in stable-queue which might be from deller@gmx.de are

queue-5.14/parisc-declare-pci_iounmap-parisc-version-only-when-config_pci-enabled.patch