UPSTREAM: arm64: mm: mark fault_info table const

Unlike the debug_fault_info table, we never intentionally alter the
fault_info table at runtime, and all derived pointers are treated as
const currently.

Make the table const so that it can be placed in .rodata and protected
from unintentional writes, as we do for the syscall tables.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Change-Id: I3fb0bb55427835c165cc377d8dc2a3fa9e6e950d
(cherry picked from commit bbb1681ee3653bdcfc6a4ba31902738118311fd4)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>

diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index edc3e20f7ba9371be929052730b02eb2aa4a07c6..caca03becf9db2a6056556a547b5dc27ce4ea7cc 100644 (file)
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -438,7 +438,7 @@ static int do_bad(unsigned long addr, unsigned int esr, struct pt_regs *regs)
        return 1;
 }
 
-static struct fault_info {
+static const struct fault_info {
        int     (*fn)(unsigned long addr, unsigned int esr, struct pt_regs *regs);
        int     sig;
        int     code;