diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2021-05-17 09:22:34 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2021-07-30 10:30:21 +0200 |
| commit | e6226997ec5ac272fa76274c3675bd5b7b437c53 (patch) | |
| tree | 578040f568df097b66829e437fc6131196c8ff37 /arch/xtensa | |
| parent | 166ec4633b63c69fabc5d8d745a1c5b73fb53f1d (diff) | |
asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols
Most architectures do not need a custom implementation, and in most
cases the generic implementation is preferred, so change the polariy
on these Kconfig symbols to require architectures to select them when
they provide their own version.
The new name is CONFIG_ARCH_HAS_{STRNCPY_FROM,STRNLEN}_USER.
The remaining architectures at the moment are: ia64, mips, parisc,
um and xtensa. We should probably convert these as well, but
I was not sure how far to take this series. Thomas Bogendoerfer
had some concerns about converting mips but may still do some
more detailed measurements to see which version is better.
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: linux-parisc@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Helge Deller <deller@gmx.de> # parisc
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/Kconfig | 3 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/uaccess.h | 3 | ||||
| -rw-r--r-- | arch/xtensa/kernel/xtensa_ksyms.c | 2 |
3 files changed, 4 insertions, 4 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 2332b2156993..282fc195680e 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -7,6 +7,8 @@ config XTENSA select ARCH_HAS_SYNC_DMA_FOR_CPU if MMU select ARCH_HAS_SYNC_DMA_FOR_DEVICE if MMU select ARCH_HAS_DMA_SET_UNCACHED if MMU + select ARCH_HAS_STRNCPY_FROM_USER if !KASAN + select ARCH_HAS_STRNLEN_USER select ARCH_USE_MEMTEST select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS @@ -20,7 +22,6 @@ config XTENSA select GENERIC_IRQ_SHOW select GENERIC_PCI_IOMAP select GENERIC_SCHED_CLOCK - select GENERIC_STRNCPY_FROM_USER if KASAN select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h index 5c9fb8005aa8..75bd8fbf52ba 100644 --- a/arch/xtensa/include/asm/uaccess.h +++ b/arch/xtensa/include/asm/uaccess.h @@ -290,8 +290,7 @@ clear_user(void __user *addr, unsigned long size) #define __clear_user __xtensa_clear_user -#ifndef CONFIG_GENERIC_STRNCPY_FROM_USER - +#ifdef CONFIG_ARCH_HAS_STRNCPY_FROM_USER extern long __strncpy_user(char *dst, const char __user *src, long count); static inline long diff --git a/arch/xtensa/kernel/xtensa_ksyms.c b/arch/xtensa/kernel/xtensa_ksyms.c index 415fe7faa37f..d79edbb98d2a 100644 --- a/arch/xtensa/kernel/xtensa_ksyms.c +++ b/arch/xtensa/kernel/xtensa_ksyms.c @@ -43,7 +43,7 @@ EXPORT_SYMBOL(memmove); EXPORT_SYMBOL(__memset); EXPORT_SYMBOL(__memcpy); EXPORT_SYMBOL(__memmove); -#ifndef CONFIG_GENERIC_STRNCPY_FROM_USER +#ifdef CONFIG_ARCH_HAS_STRNCPY_FROM_USER EXPORT_SYMBOL(__strncpy_user); #endif EXPORT_SYMBOL(clear_page); |