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authorSamuel Holland <samuel.holland@sifive.com>2024-02-27 03:34:46 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-05-02 17:35:33 +0300
commitefdcfa554b6eb228943ef1dd4d023c606be647d2 (patch)
tree1f9791da24b12f6831b5784db09115a3f9b822d9
parent47533176fdcef17b114a6f688bc872901c1ec6bb (diff)
downloadlinux-efdcfa554b6eb228943ef1dd4d023c606be647d2.tar.xz
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.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 3422ced8a07f..39c6bb825468 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -888,7 +888,7 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte)
#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