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parisc: Add support for CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN

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Allow users to disable kernel warnings for unaligned memory
accesses from kernel via the /proc/sys/kernel/ignore-unaligned-usertrap
procfs entry.
That way users can disable those warnings in case they happen too
often.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller
2024-07-21 23:36:36 +02:00
parent 2fd4e52e44
commit cbade82334
3 changed files with 4 additions and 1 deletions
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2
arch/parisc/kernel/unaligned.c
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@@ -104,6 +104,7 @@
#define ERR_NOTHANDLED -1
int unaligned_enabled __read_mostly = 1;
int no_unaligned_warning __read_mostly;
static int emulate_ldh(struct pt_regs *regs, int toreg)
{
@@ -399,6 +400,7 @@ void handle_unaligned(struct pt_regs *regs)
} else {
static DEFINE_RATELIMIT_STATE(kernel_ratelimit, 5 * HZ, 5);
if (!(current->thread.flags & PARISC_UAC_NOPRINT) &&
!no_unaligned_warning &&
__ratelimit(&kernel_ratelimit))
pr_warn("Kernel: unaligned access to " RFMT " in %pS "
"(iir " RFMT ")\n",