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2021-02-22riscv: Get rid of MAX_EARLY_MAPPING_SIZEAlexandre Ghiti1-16/+5
At early boot stage, we have a whole PGDIR to map the kernel, so there is no need to restrict the early mapping size to 128MB. Removing this define also allows us to simplify some compile time logic. This fixes large kernel mappings with a size greater than 128MB, as it is the case for syzbot kernels whose size was just ~130MB. Note that on rv64, for now, we are then limited to PGDIR size for early mapping as we can't use PGD mappings (see [1]). That should be enough given the relative small size of syzbot kernels compared to PGDIR_SIZE which is 1GB. [1] https://lore.kernel.org/lkml/20200603153608.30056-1-alex@ghiti.fr/ Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> Tested-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2021-02-22soc: canaan: Sort the Makefile alphabeticallyPalmer Dabbelt1-1/+1
The rest of these are alphabetically sorted, and leaving it this way causes a merge conflict. Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2021-02-22riscv: Disable KSAN_SANITIZE for vDSOTobias Klauser1-1/+2
We use the generic C VDSO implementations of a handful of clock-related functions. When kasan is enabled this results in asan stub calls that are unlikely to be resolved by userspace, this just disables KASAN when building the VDSO. Verified the fix on a kernel with KASAN enabled using vDSO selftests. Link: https://lore.kernel.org/lkml/CACT4Y+ZNJBnkKHXUf=tm_yuowvZvHwN=0rmJ=7J+xFd+9r_6pQ@mail.gmail.com/ Tested-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Tested-by: Dmitry Vyukov <dvyukov@google.com> [Palmer: commit text] Fixes: ad5d1122b82f ("riscv: use vDSO common flow to reduce the latency of the time-related functions") Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2021-02-22riscv: Remove unnecessary declarationKefeng Wang1-3/+0
max_low_pfn and min_low_pfn are declared in linux/memblock.h, and it also is included in arch/riscv/mm/init.c, drop unnecessary declaration. Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Reviewed-by: Atish Patra <atish.patra@wdc.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>