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| author | Jonathan Corbet <corbet@lwn.net> | 2016-11-18 16:13:41 -0700 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2016-11-18 16:13:41 -0700 |
| commit | 917fef6f7ee8b2fe852692ac49771342bfef9433 (patch) | |
| tree | b5932aab90d449841803b6f8679a4564ca2a6eaf /arch/arm64/kernel/traps.c | |
| parent | 0c9aa209579d41c9b8bf1fc39ce042bea2ec422d (diff) | |
| parent | bc33b0ca11e3df467777a4fa7639ba488c9d4911 (diff) | |
| download | linux-stable-917fef6f7ee8b2fe852692ac49771342bfef9433.tar.gz linux-stable-917fef6f7ee8b2fe852692ac49771342bfef9433.tar.bz2 linux-stable-917fef6f7ee8b2fe852692ac49771342bfef9433.zip | |
Merge tag 'v4.9-rc4' into sound
Bring in -rc4 patches so I can successfully merge the sound doc changes.
Diffstat (limited to 'arch/arm64/kernel/traps.c')
| -rw-r--r-- | arch/arm64/kernel/traps.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 5ff020f8fb7f..c9986b3e0a96 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -428,24 +428,28 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) force_signal_inject(SIGILL, ILL_ILLOPC, regs, 0); } -void cpu_enable_cache_maint_trap(void *__unused) +int cpu_enable_cache_maint_trap(void *__unused) { config_sctlr_el1(SCTLR_EL1_UCI, 0); + return 0; } #define __user_cache_maint(insn, address, res) \ - asm volatile ( \ - "1: " insn ", %1\n" \ - " mov %w0, #0\n" \ - "2:\n" \ - " .pushsection .fixup,\"ax\"\n" \ - " .align 2\n" \ - "3: mov %w0, %w2\n" \ - " b 2b\n" \ - " .popsection\n" \ - _ASM_EXTABLE(1b, 3b) \ - : "=r" (res) \ - : "r" (address), "i" (-EFAULT) ) + if (untagged_addr(address) >= user_addr_max()) \ + res = -EFAULT; \ + else \ + asm volatile ( \ + "1: " insn ", %1\n" \ + " mov %w0, #0\n" \ + "2:\n" \ + " .pushsection .fixup,\"ax\"\n" \ + " .align 2\n" \ + "3: mov %w0, %w2\n" \ + " b 2b\n" \ + " .popsection\n" \ + _ASM_EXTABLE(1b, 3b) \ + : "=r" (res) \ + : "r" (address), "i" (-EFAULT) ) static void user_cache_maint_handler(unsigned int esr, struct pt_regs *regs) { |