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riscv_isa_ext_keys[] is an array of static keys used in the unified
ISA extension framework. The keys added to this array may be used
anywhere, including in modules. Ensure the keys remain writable by
placing them in the data section.
The need to change riscv_isa_ext_keys[]'s section was found when the
kvm module started failing to load. Commit 8eb060e10185 ("arch/riscv:
add Zihintpause support") adds a static branch check for a newly
added isa-ext key to cpu_relax(), which kvm uses.
Fixes: c360cbec3511 ("riscv: introduce unified static key mechanism for ISA extensions")
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Cc: stable@vger.kernel.org
Reported-by: Ron Economos <re@w6rz.net>
Reported-by: Anup Patel <apatel@ventanamicro.com>
Reported-by: Conor Dooley <conor.dooley@microchip.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20220816163058.3004536-1-ajones@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
eb6354e116