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author | Ingo Molnar <mingo@kernel.org> | 2020-02-24 13:36:09 +0300 |
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committer | Ingo Molnar <mingo@kernel.org> | 2020-02-24 13:36:09 +0300 |
commit | 546121b65f47384e11ec1fa2e55449fc9f4846b2 (patch) | |
tree | 8f18470ec7c0c77b0f48eb1b2338e591b0b0aaff /arch/riscv/mm/physaddr.c | |
parent | 000619680c3714020ce9db17eef6a4a7ce2dc28b (diff) | |
parent | f8788d86ab28f61f7b46eb6be375f8a726783636 (diff) | |
download | linux-546121b65f47384e11ec1fa2e55449fc9f4846b2.tar.xz |
Merge tag 'v5.6-rc3' into sched/core, to pick up fixes and dependent patches
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/riscv/mm/physaddr.c')
-rw-r--r-- | arch/riscv/mm/physaddr.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/riscv/mm/physaddr.c b/arch/riscv/mm/physaddr.c new file mode 100644 index 000000000000..e8e4dcd39fed --- /dev/null +++ b/arch/riscv/mm/physaddr.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/types.h> +#include <linux/mmdebug.h> +#include <linux/mm.h> +#include <asm/page.h> +#include <asm/sections.h> + +phys_addr_t __virt_to_phys(unsigned long x) +{ + phys_addr_t y = x - PAGE_OFFSET; + + /* + * Boundary checking aginst the kernel linear mapping space. + */ + WARN(y >= KERN_VIRT_SIZE, + "virt_to_phys used for non-linear address: %pK (%pS)\n", + (void *)x, (void *)x); + + return __va_to_pa_nodebug(x); +} +EXPORT_SYMBOL(__virt_to_phys); + +phys_addr_t __phys_addr_symbol(unsigned long x) +{ + unsigned long kernel_start = (unsigned long)PAGE_OFFSET; + unsigned long kernel_end = (unsigned long)_end; + + /* + * Boundary checking aginst the kernel image mapping. + * __pa_symbol should only be used on kernel symbol addresses. + */ + VIRTUAL_BUG_ON(x < kernel_start || x > kernel_end); + + return __va_to_pa_nodebug(x); +} +EXPORT_SYMBOL(__phys_addr_symbol); |