Merge tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc updates from Andrew Morton:
 "Updates to various subsystems which I help look after. lib, ocfs2,
  fatfs, autofs, squashfs, procfs, etc. A relatively small amount of
  material this time"

* tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (72 commits)
  scripts/gdb: ensure the absolute path is generated on initial source
  MAINTAINERS: kunit: add David Gow as a maintainer of KUnit
  mailmap: add linux.dev alias for Brendan Higgins
  mailmap: update Kirill's email
  profile: setup_profiling_timer() is moslty not implemented
  ocfs2: fix a typo in a comment
  ocfs2: use the bitmap API to simplify code
  ocfs2: remove some useless functions
  lib/mpi: fix typo 'the the' in comment
  proc: add some (hopefully) insightful comments
  bdi: remove enum wb_congested_state
  kernel/hung_task: fix address space of proc_dohung_task_timeout_secs
  lib/lzo/lzo1x_compress.c: replace ternary operator with min() and min_t()
  squashfs: support reading fragments in readahead call
  squashfs: implement readahead
  squashfs: always build "file direct" version of page actor
  Revert "squashfs: provide backing_dev_info in order to disable read-ahead"
  fs/ocfs2: Fix spelling typo in comment
  ia64: old_rr4 added under CONFIG_HUGETLB_PAGE
  proc: fix test for "vsyscall=xonly" boot option
  ...

.mailmap

@@ -78,6 +78,7 @@ Boris Brezillon <bbrezillon@kernel.org> <b.brezillon.dev@gmail.com>
 Boris Brezillon <bbrezillon@kernel.org> <b.brezillon@overkiz.com>
 Boris Brezillon <bbrezillon@kernel.org> <boris.brezillon@bootlin.com>
 Boris Brezillon <bbrezillon@kernel.org> <boris.brezillon@free-electrons.com>
+Brendan Higgins <brendan.higgins@linux.dev> <brendanhiggins@google.com>
 Brian Avery <b.avery@hp.com>
 Brian King <brking@us.ibm.com>
 Brian Silverman <bsilver16384@gmail.com> <brian.silverman@bluerivertech.com>
@@ -230,7 +231,7 @@ Kees Cook <keescook@chromium.org> <kees@ubuntu.com>
 Keith Busch <kbusch@kernel.org> <keith.busch@intel.com>
 Keith Busch <kbusch@kernel.org> <keith.busch@linux.intel.com>
 Kenneth W Chen <kenneth.w.chen@intel.com>
-Kirill Tkhai <kirill.tkhai@openvz.org> <ktkhai@virtuozzo.com>
+Kirill Tkhai <tkhai@ya.ru> <ktkhai@virtuozzo.com>
 Konstantin Khlebnikov <koct9i@gmail.com> <khlebnikov@yandex-team.ru>
 Konstantin Khlebnikov <koct9i@gmail.com> <k.khlebnikov@samsung.com>
 Koushik <raghavendra.koushik@neterion.com>

Documentation/admin-guide/kernel-parameters.txt

@@ -1673,6 +1673,19 @@
 
 	hlt		[BUGS=ARM,SH]
 
+	hostname=	[KNL] Set the hostname (aka UTS nodename).
+			Format: <string>
+			This allows setting the system's hostname during early
+			startup. This sets the name returned by gethostname.
+			Using this parameter to set the hostname makes it
+			possible to ensure the hostname is correctly set before
+			any userspace processes run, avoiding the possibility
+			that a process may call gethostname before the hostname
+			has been explicitly set, resulting in the calling
+			process getting an incorrect result. The string must
+			not exceed the maximum allowed hostname length (usually
+			64 characters) and will be truncated otherwise.
+
 	hpet=		[X86-32,HPET] option to control HPET usage
 			Format: { enable (default) | disable | force |
 				verbose }

MAINTAINERS

@@ -11065,6 +11065,7 @@ F:	fs/smbfs_common/
 
 KERNEL UNIT TESTING FRAMEWORK (KUnit)
 M:	Brendan Higgins <brendanhiggins@google.com>
+M:	David Gow <davidgow@google.com>
 L:	linux-kselftest@vger.kernel.org
 L:	kunit-dev@googlegroups.com
 S:	Maintained
@@ -21277,6 +21278,7 @@ M:	OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
 S:	Maintained
 F:	Documentation/filesystems/vfat.rst
 F:	fs/fat/
+F:	tools/testing/selftests/filesystems/fat/
 
 VFIO DRIVER
 M:	Alex Williamson <alex.williamson@redhat.com>

arch/alpha/kernel/smp.c

@@ -497,12 +497,6 @@ smp_cpus_done(unsigned int max_cpus)
 	       ((bogosum + 2500) / (5000/HZ)) % 100);
 }
 
-int
-setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 static void
 send_ipi_message(const struct cpumask *to_whom, enum ipi_message_type operation)
 {

arch/arc/kernel/smp.c

@@ -232,14 +232,6 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
 	return 0;
 }
 
-/*
- * not supported here
- */
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 /*****************************************************************************/
 /*              Inter Processor Interrupt Handling                           */
 /*****************************************************************************/

arch/arm/kernel/smp.c

@@ -787,14 +787,6 @@ void panic_smp_self_stop(void)
 		cpu_relax();
 }
 
-/*
- * not supported here
- */
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 #ifdef CONFIG_CPU_FREQ
 
 static DEFINE_PER_CPU(unsigned long, l_p_j_ref);

arch/arm64/kernel/smp.c

@@ -1078,14 +1078,6 @@ bool smp_crash_stop_failed(void)
 }
 #endif
 
-/*
- * not supported here
- */
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 static bool have_cpu_die(void)
 {
 #ifdef CONFIG_HOTPLUG_CPU

arch/csky/kernel/smp.c

@@ -243,11 +243,6 @@ void __init smp_cpus_done(unsigned int max_cpus)
 {
 }
 
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 void csky_start_secondary(void)
 {
 	struct mm_struct *mm = &init_mm;

arch/hexagon/kernel/smp.c

@@ -240,11 +240,6 @@ void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 	send_ipi(mask, IPI_CALL_FUNC);
 }
 
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 void smp_start_cpus(void)
 {
 	int i;

arch/ia64/include/asm/mmu_context.h

@@ -124,9 +124,12 @@ reload_context (nv_mm_context_t context)
 {
 	unsigned long rid;
 	unsigned long rid_incr = 0;
-	unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4;
+	unsigned long rr0, rr1, rr2, rr3, rr4;
 
+#ifdef CONFIG_HUGETLB_PAGE
+	unsigned long old_rr4;
 	old_rr4 = ia64_get_rr(RGN_BASE(RGN_HPAGE));
+#endif
 	rid = context << 3;	/* make space for encoding the region number */
 	rid_incr = 1 << 8;
 

arch/ia64/include/uapi/asm/cmpxchg.h

@@ -33,24 +33,24 @@ extern void ia64_xchg_called_with_bad_pointer(void);
 									\
 	switch (size) {							\
 	case 1:								\
-		__xchg_result = ia64_xchg1((__u8 *)ptr, x);		\
+		__xchg_result = ia64_xchg1((__u8 __force *)ptr, x);	\
 		break;							\
 									\
 	case 2:								\
-		__xchg_result = ia64_xchg2((__u16 *)ptr, x);		\
+		__xchg_result = ia64_xchg2((__u16 __force *)ptr, x);	\
 		break;							\
 									\
 	case 4:								\
-		__xchg_result = ia64_xchg4((__u32 *)ptr, x);		\
+		__xchg_result = ia64_xchg4((__u32 __force *)ptr, x);	\
 		break;							\
 									\
 	case 8:								\
-		__xchg_result = ia64_xchg8((__u64 *)ptr, x);		\
+		__xchg_result = ia64_xchg8((__u64 __force *)ptr, x);	\
 		break;							\
 	default:							\
 		ia64_xchg_called_with_bad_pointer();			\
 	}								\
-	__xchg_result;							\
+	(__typeof__ (*(ptr)) __force) __xchg_result;			\
 })
 
 #ifndef __KERNEL__
@@ -76,42 +76,42 @@ extern long ia64_cmpxchg_called_with_bad_pointer(void);
 									\
 	switch (size) {							\
 	case 1:								\
-		_o_ = (__u8) (long) (old);				\
+		_o_ = (__u8) (long __force) (old);			\
 		break;							\
 	case 2:								\
-		_o_ = (__u16) (long) (old);				\
+		_o_ = (__u16) (long __force) (old);			\
 		break;							\
 	case 4:								\
-		_o_ = (__u32) (long) (old);				\
+		_o_ = (__u32) (long __force) (old);			\
 		break;							\
 	case 8:								\
-		_o_ = (__u64) (long) (old);				\
+		_o_ = (__u64) (long __force) (old);			\
 		break;							\
 	default:							\
 		break;							\
 	}								\
 	switch (size) {							\
 	case 1:								\
-		_r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_);	\
+		_r_ = ia64_cmpxchg1_##sem((__u8 __force *) ptr, new, _o_);	\
 		break;							\
 									\
 	case 2:								\
-		_r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_);	\
+		_r_ = ia64_cmpxchg2_##sem((__u16 __force *) ptr, new, _o_);	\
 		break;							\
 									\
 	case 4:								\
-		_r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_);	\
+		_r_ = ia64_cmpxchg4_##sem((__u32 __force *) ptr, new, _o_);	\
 		break;							\
 									\
 	case 8:								\
-		_r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_);	\
+		_r_ = ia64_cmpxchg8_##sem((__u64 __force *) ptr, new, _o_);	\
 		break;							\
 									\
 	default:							\
 		_r_ = ia64_cmpxchg_called_with_bad_pointer();		\
 		break;							\
 	}								\
-	(__typeof__(old)) _r_;						\
+	(__typeof__(old) __force) _r_;					\
 })
 
 #define cmpxchg_acq(ptr, o, n)	\

arch/ia64/kernel/smp.c

@@ -333,9 +333,3 @@ smp_send_stop (void)
 {
 	send_IPI_allbutself(IPI_CPU_STOP);
 }
-
-int
-setup_profiling_timer (unsigned int multiplier)
-{
-	return -EINVAL;
-}

arch/openrisc/kernel/smp.c

@@ -197,12 +197,6 @@ void smp_send_stop(void)
 	smp_call_function(stop_this_cpu, NULL, 0);
 }
 
-/* not supported, yet */
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 void __init set_smp_cross_call(void (*fn)(const struct cpumask *, unsigned int))
 {
 	smp_cross_call = fn;

arch/parisc/kernel/smp.c

@@ -513,10 +513,3 @@ void __cpu_die(unsigned int cpu)
 
 	pdc_cpu_rendezvous_unlock();
 }
-
-#ifdef CONFIG_PROC_FS
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-#endif

arch/powerpc/kernel/smp.c

@@ -1663,13 +1663,6 @@ void start_secondary(void *unused)
 	BUG();
 }
 
-#ifdef CONFIG_PROFILING
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return 0;
-}
-#endif
-
 static void __init fixup_topology(void)
 {
 	int i;

arch/riscv/kernel/smp.c

@@ -64,12 +64,6 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
 	return phys_id == cpuid_to_hartid_map(cpu);
 }
 
-/* Unsupported */
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 static void ipi_stop(void)
 {
 	set_cpu_online(smp_processor_id(), false);

arch/sparc/kernel/smp_32.c

@@ -174,11 +174,6 @@ void smp_call_function_interrupt(void)
 	irq_exit();
 }
 
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 void __init smp_prepare_cpus(unsigned int max_cpus)
 {
 	int i, cpuid, extra;

arch/sparc/kernel/smp_64.c

@@ -1186,12 +1186,6 @@ void __irq_entry smp_penguin_jailcell(int irq, struct pt_regs *regs)
 	preempt_enable();
 }
 
-/* /proc/profile writes can call this, don't __init it please. */
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 void __init smp_prepare_cpus(unsigned int max_cpus)
 {
 }

arch/x86/include/asm/apic.h

@@ -98,8 +98,6 @@ static inline bool apic_from_smp_config(void)
 #include <asm/paravirt.h>
 #endif
 
-extern int setup_profiling_timer(unsigned int);
-
 static inline void native_apic_mem_write(u32 reg, u32 v)
 {
 	volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);

arch/x86/kernel/apic/apic.c

@@ -1115,11 +1115,6 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_apic_timer_interrupt)
 	set_irq_regs(old_regs);
 }
 
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 /*
  * Local APIC start and shutdown
  */