Samuel Holland ad5643cf2f riscv: Define TASK_SIZE_MAX for __access_ok() ... TASK_SIZE_MAX should be set to a constant value, at least the largest valid userspace address under any runtime configuration. This optimizes the check in __access_ok(), which no longer needs to compute the runtime value of TASK_SIZE. The check does not need to be exact, as long as it accepts all valid userspace addresses and rejects all valid kernel addresses; well-behaved programs will never fail the access_ok() check. For RISC-V, which requires all virtual addresses to be sign extended, the optimal choice is LONG_MAX because it simplifies the limit comparison to a sign bit test. This removes about half of the references to pgtable_l[45]_enabled. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> Link: https://lore.kernel.org/r/20240327143858.711792-3-samuel.holland@sifive.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2024-05-16 12:59:58 -07:00
..
boot	RISC-V Patches for the 6.9 Merge Window	2024-03-22 10:41:13 -07:00
configs	RISC-V Patches for the 6.9 Merge Window	2024-03-22 10:41:13 -07:00
crypto	crypto: riscv - add vector crypto accelerated AES-CBC-CTS	2024-03-20 08:56:11 -07:00
errata	riscv: errata: Rename defines for Andes	2024-03-12 07:13:12 -07:00
include	riscv: Define TASK_SIZE_MAX for __access_ok()	2024-05-16 12:59:58 -07:00
kernel	RISC-V Patches for the 6.9 Merge Window	2024-03-22 10:41:13 -07:00
kvm	KVM/riscv changes for 6.9	2024-03-11 10:10:48 -04:00
lib	RISC-V Patches for the 6.9 Merge Window	2024-03-22 10:41:13 -07:00
mm	RISC-V Patches for the 6.9 Merge Window	2024-03-22 10:41:13 -07:00
net	bpf, riscv64/cfi: Support kCFI + BPF on riscv64	2024-03-06 15:18:16 -08:00
purgatory
tools
Kbuild	RISC-V: hook new crypto subdir into build-system	2024-01-22 17:55:17 -08:00
Kconfig	RISC-V Patches for the 6.9 Merge Window	2024-03-22 10:41:13 -07:00
Kconfig.debug
Kconfig.errata	RISC-V Patches for the 6.8 Merge Window, Part 4	2024-01-20 11:06:04 -08:00
Kconfig.socs	riscv: dts: Move BUILTIN_DTB_SOURCE to common Kconfig	2024-03-06 00:08:32 +00:00
Makefile	RISC-V: build: Allow LTO to be selected	2024-01-22 10:06:29 -08:00
Makefile.postlink