diff options
| author | Baoquan He <bhe@redhat.com> | 2023-07-06 23:45:06 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-18 10:12:33 -0700 |
| commit | dfdc6ba95768b4935058dcf2a8a09874289ba88f (patch) | |
| tree | 88764e5b5901188209d59ee923a70b4a1ca8df9e | |
| parent | 7613366a190202a8ebe8090ca4758b551f1b7feb (diff) | |
mm: ioremap: allow ARCH to have its own ioremap method definition
Architectures can be converted to GENERIC_IOREMAP, to take standard
ioremap_xxx() and iounmap() way. But some ARCH-es could have specific
handling for ioremap_prot(), ioremap() and iounmap(), than standard
methods.
In oder to convert these ARCH-es to take GENERIC_IOREMAP method, allow
these architecutres to have their own ioremap_prot(), ioremap() and
iounmap() definitions.
Link: https://lkml.kernel.org/r/20230706154520.11257-6-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Brian Cain <bcain@quicinc.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Chris Zankel <chris@zankel.net>
Cc: David Laight <David.Laight@ACULAB.COM>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Niklas Schnelle <schnelle@linux.ibm.com>
Cc: Rich Felker <dalias@libc.org>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/asm-generic/io.h | 3 | ||||
| -rw-r--r-- | mm/ioremap.c | 4 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h index a7ca2099ba19..39244c3ee797 100644 --- a/include/asm-generic/io.h +++ b/include/asm-generic/io.h @@ -1081,11 +1081,14 @@ void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, void iounmap(volatile void __iomem *addr); void generic_iounmap(volatile void __iomem *addr); +#ifndef ioremap +#define ioremap ioremap static inline void __iomem *ioremap(phys_addr_t addr, size_t size) { /* _PAGE_IOREMAP needs to be supplied by the architecture */ return ioremap_prot(addr, size, _PAGE_IOREMAP); } +#endif #endif /* !CONFIG_MMU || CONFIG_GENERIC_IOREMAP */ #ifndef ioremap_wc diff --git a/mm/ioremap.c b/mm/ioremap.c index db6234b9db59..9f34a8f90b58 100644 --- a/mm/ioremap.c +++ b/mm/ioremap.c @@ -46,12 +46,14 @@ void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size, return (void __iomem *)(vaddr + offset); } +#ifndef ioremap_prot void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, unsigned long prot) { return generic_ioremap_prot(phys_addr, size, __pgprot(prot)); } EXPORT_SYMBOL(ioremap_prot); +#endif void generic_iounmap(volatile void __iomem *addr) { @@ -64,8 +66,10 @@ void generic_iounmap(volatile void __iomem *addr) vunmap(vaddr); } +#ifndef iounmap void iounmap(volatile void __iomem *addr) { generic_iounmap(addr); } EXPORT_SYMBOL(iounmap); +#endif |