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| author | Masahiro Yamada <masahiroy@kernel.org> | 2020-03-25 08:45:29 +0100 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-03-25 16:07:13 +0100 |
| commit | 78bdbbac08d7383b5c8a2b489ae789049704b046 (patch) | |
| tree | b2fb07186426f12af56af524df1f27bd387cf600 /arch/mips | |
| parent | MAINTAINERS: Update Loongson64 entry (diff) | |
| download | linux-78bdbbac08d7383b5c8a2b489ae789049704b046.tar.xz linux-78bdbbac08d7383b5c8a2b489ae789049704b046.zip | |
MIPS: do not compile generic functions for CONFIG_CAVIUM_OCTEON_SOC
MIPS provides multiple definitions for the following functions:
fw_init_cmdline
__delay
__udelay
__ndelay
memmove
__rmemcpy
memcpy
__copy_user
The generic ones are defined in lib-y objects, which are overridden by
the Octeon ones when CONFIG_CAVIUM_OCTEON_SOC is enabled.
The use of EXPORT_SYMBOL in static libraries potentially causes a
problem for the llvm linker [1]. So, I want to forcibly link lib-y
objects to vmlinux when CONFIG_MODULES=y.
As a groundwork, we must fix multiple definitions that have previously
been hidden by lib-y.
If you look at lib/string.c, arch can define __HAVE_ARCH_* to opt out
the generic implementation.
Similarly, this commit adds CONFIG_HAVE_PLAT_* to allow a platform
to opt out the MIPS generic code.
[1]: https://github.com/ClangBuiltLinux/linux/issues/515
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Kconfig | 12 | ||||
| -rw-r--r-- | arch/mips/fw/lib/cmdline.c | 2 | ||||
| -rw-r--r-- | arch/mips/lib/delay.c | 4 | ||||
| -rw-r--r-- | arch/mips/lib/memcpy.S | 3 |
4 files changed, 21 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 4a0b2f494d79..a1f973cc0265 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -975,6 +975,9 @@ config CAVIUM_OCTEON_SOC select SYS_HAS_EARLY_PRINTK select SYS_HAS_CPU_CAVIUM_OCTEON select HAVE_PCI + select HAVE_PLAT_DELAY + select HAVE_PLAT_FW_INIT_CMDLINE + select HAVE_PLAT_MEMCPY select ZONE_DMA32 select HOLES_IN_ZONE select GPIOLIB @@ -1231,6 +1234,15 @@ config GENERIC_ISA_DMA_SUPPORT_BROKEN bool select GENERIC_ISA_DMA +config HAVE_PLAT_DELAY + bool + +config HAVE_PLAT_FW_INIT_CMDLINE + bool + +config HAVE_PLAT_MEMCPY + bool + config ISA_DMA_API bool diff --git a/arch/mips/fw/lib/cmdline.c b/arch/mips/fw/lib/cmdline.c index 6ecda64ad184..f24cbb4a39b5 100644 --- a/arch/mips/fw/lib/cmdline.c +++ b/arch/mips/fw/lib/cmdline.c @@ -16,6 +16,7 @@ int fw_argc; int *_fw_argv; int *_fw_envp; +#ifndef CONFIG_HAVE_PLAT_FW_INIT_CMDLINE void __init fw_init_cmdline(void) { int i; @@ -41,6 +42,7 @@ void __init fw_init_cmdline(void) strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); } } +#endif char * __init fw_getcmdline(void) { diff --git a/arch/mips/lib/delay.c b/arch/mips/lib/delay.c index 68c495ed71e3..2e8dfc1d59c8 100644 --- a/arch/mips/lib/delay.c +++ b/arch/mips/lib/delay.c @@ -24,6 +24,8 @@ #define GCC_DADDI_IMM_ASM() "r" #endif +#ifndef CONFIG_HAVE_PLAT_DELAY + void __delay(unsigned long loops) { __asm__ __volatile__ ( @@ -63,3 +65,5 @@ void __ndelay(unsigned long ns) __delay((ns * 0x00000005ull * HZ * lpj) >> 32); } EXPORT_SYMBOL(__ndelay); + +#endif diff --git a/arch/mips/lib/memcpy.S b/arch/mips/lib/memcpy.S index f7994d936505..88065ee433cd 100644 --- a/arch/mips/lib/memcpy.S +++ b/arch/mips/lib/memcpy.S @@ -598,6 +598,7 @@ SEXC(1) nop .endm +#ifndef CONFIG_HAVE_PLAT_MEMCPY .align 5 LEAF(memmove) EXPORT_SYMBOL(memmove) @@ -665,6 +666,8 @@ EXPORT_SYMBOL(__copy_user) /* Legacy Mode, user <-> user */ __BUILD_COPY_USER LEGACY_MODE USEROP USEROP +#endif + #ifdef CONFIG_EVA /* |