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| author | Samuel Holland <samuel.holland@sifive.com> | 2024-02-26 16:34:46 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-02 16:23:45 +0200 |
| commit | 04bf2e5f95c1a52e28a7567a507f926efe31c3b6 (patch) | |
| tree | 9e47cfe5c64035702593ee4e2850a8fa75b5056f | |
| parent | d5cc3498f0791a4cb70d78fee8027c62573ef55e (diff) | |
| download | linux-stable-04bf2e5f95c1a52e28a7567a507f926efe31c3b6.tar.gz linux-stable-04bf2e5f95c1a52e28a7567a507f926efe31c3b6.tar.bz2 linux-stable-04bf2e5f95c1a52e28a7567a507f926efe31c3b6.zip | |
riscv: Fix TASK_SIZE on 64-bit NOMMU
[ Upstream commit 6065e736f82c817c9a597a31ee67f0ce4628e948 ]
On NOMMU, userspace memory can come from anywhere in physical RAM. The
current definition of TASK_SIZE is wrong if any RAM exists above 4G,
causing spurious failures in the userspace access routines.
Fixes: 6bd33e1ece52 ("riscv: add nommu support")
Fixes: c3f896dcf1e4 ("mm: switch the test_vmalloc module to use __vmalloc_node")
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Bo Gan <ganboing@gmail.com>
Link: https://lore.kernel.org/r/20240227003630.3634533-2-samuel.holland@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | arch/riscv/include/asm/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index d048fb5faa69..982745572945 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -456,7 +456,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma, #define PAGE_SHARED __pgprot(0) #define PAGE_KERNEL __pgprot(0) #define swapper_pg_dir NULL -#define TASK_SIZE 0xffffffffUL +#define TASK_SIZE _AC(-1, UL) #define VMALLOC_START _AC(0, UL) #define VMALLOC_END TASK_SIZE |