Arnd Bergmann 12700c17fc uaccess: generalize access_ok() ... There are many different ways that access_ok() is defined across architectures, but in the end, they all just compare against the user_addr_max() value or they accept anything. Provide one definition that works for most architectures, checking against TASK_SIZE_MAX for user processes or skipping the check inside of uaccess_kernel() sections. For architectures without CONFIG_SET_FS(), this should be the fastest check, as it comes down to a single comparison of a pointer against a compile-time constant, while the architecture specific versions tend to do something more complex for historic reasons or get something wrong. Type checking for __user annotations is handled inconsistently across architectures, but this is easily simplified as well by using an inline function that takes a 'const void __user *' argument. A handful of callers need an extra __user annotation for this. Some architectures had trick to use 33-bit or 65-bit arithmetic on the addresses to calculate the overflow, however this simpler version uses fewer registers, which means it can produce better object code in the end despite needing a second (statically predicted) branch. Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Mark Rutland <mark.rutland@arm.com> [arm64, asm-generic] Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Stafford Horne <shorne@gmail.com> Acked-by: Dinh Nguyen <dinguyen@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>		2022-02-25 09:36:05 +01:00
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boot	riscv: dts: sifive unmatched: Add gpio poweroff	2022-01-20 09:37:23 -08:00
configs	RISC-V: nommu_virt: Drop unused SLAB_MERGE_DEFAULT	2022-01-20 12:48:14 -08:00
errata	riscv: errata: alternative: mark vendor_patch_func __initdata	2022-01-09 11:02:46 -08:00
include	uaccess: generalize access_ok()	2022-02-25 09:36:05 +01:00
kernel	uaccess: fix type mismatch warnings from access_ok()	2022-02-25 09:36:05 +01:00
kvm	KVM/arm64 fixes for 5.17, take #2	2022-02-05 00:58:25 -05:00
lib	riscv: extable: consolidate definitions	2022-01-05 17:52:47 -08:00
mm	RISC-V: Do not use cpumask data structure for hartid bitmap	2022-01-20 09:27:22 -08:00
net	riscv: bpf: Fix eBPF's exception tables	2022-01-19 10:50:02 -08:00
Kbuild	kbuild: use more subdir- for visiting subdirectories while cleaning	2021-10-24 13:49:46 +09:00
Kconfig	RISC-V Patches for the 5.17 Merge Window, Part 2	2022-01-22 09:34:49 +02:00
Kconfig.debug	RISC-V: Remove EARLY_PRINTK support	2018-12-17 10:23:46 -08:00
Kconfig.erratas	riscv: enable SiFive errata CIP-453 and CIP-1200 Kconfig only if CONFIG_64BIT=y	2021-05-06 09:40:13 -07:00
Kconfig.socs	RISC-V: Add StarFive SoC Kconfig option	2021-11-28 20:03:34 +01:00
Makefile	riscv: fix building external modules	2021-11-18 23:06:23 -08:00