10 files changed, 30 insertions, 38 deletions

diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c
index 5f6e9e2ebbdb..f58325f9bd2b 100644
--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -159,17 +159,6 @@ irqreturn_t c0_compare_interrupt(int irq, void *dev_id)
 	return IRQ_NONE;
 }
 
-struct irqaction c0_compare_irqaction = {
-	.handler = c0_compare_interrupt,
-	/*
-	 * IRQF_SHARED: The timer interrupt may be shared with other interrupts
-	 * such as perf counter and FDC interrupts.
-	 */
-	.flags = IRQF_PERCPU | IRQF_TIMER | IRQF_SHARED,
-	.name = "timer",
-};
-
-
 void mips_event_handler(struct clock_event_device *dev)
 {
 }
diff --git a/arch/mips/kernel/module.c b/arch/mips/kernel/module.c
index ba0f62d8eff5..37dea772fd78 100644
--- a/arch/mips/kernel/module.c
+++ b/arch/mips/kernel/module.c
@@ -72,7 +72,7 @@ static int apply_r_mips_hi16(struct module *me, u32 *location, Elf_Addr v,
 	 * the carry we need to add.  Save the information, and let LO16 do the
 	 * actual relocation.
 	 */
-	n = kmalloc(sizeof *n, GFP_KERNEL);
+	n = kmalloc_obj(*n);
 	if (!n)
 		return -ENOMEM;
 
diff --git a/arch/mips/kernel/relocate.c b/arch/mips/kernel/relocate.c
index 7f1c136ad850..59833210542f 100644
--- a/arch/mips/kernel/relocate.c
+++ b/arch/mips/kernel/relocate.c
@@ -420,7 +420,20 @@ void *__init relocate_kernel(void)
 			goto out;
 
 		/* The current thread is now within the relocated image */
+#ifndef CONFIG_CC_IS_CLANG
 		__current_thread_info = RELOCATED(&init_thread_union);
+#else
+		/*
+		 * LLVM may wrongly restore $gp ($28) in epilog even if it's
+		 * intentionally modified. Work around this by using inline
+		 * assembly to assign $gp. $gp couldn't be listed as output or
+		 * clobber, or LLVM will still restore its original value.
+		 * See also LLVM upstream issue
+		 * https://github.com/llvm/llvm-project/issues/176546
+		 */
+		asm volatile("move $28, %0" : :
+			     "r" (RELOCATED(&init_thread_union)));
+#endif
 
 		/* Return the new kernel's entry point */
 		kernel_entry = RELOCATED(start_kernel);
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 11b9b6b63e19..f9b228e33f3b 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/cpu.h>
 #include <linux/delay.h>
+#include <linux/hex.h>
 #include <linux/ioport.h>
 #include <linux/export.h>
 #include <linux/memblock.h>
@@ -614,8 +615,7 @@ static void __init bootcmdline_init(void)
  * kernel but generic memory management system is still entirely uninitialized.
  *
  *  o bootmem_init()
- *  o sparse_init()
- *  o paging_init()
+ *  o pagetable_init()
  *  o dma_contiguous_reserve()
  *
  * At this stage the bootmem allocator is ready to use.
@@ -665,16 +665,6 @@ static void __init arch_mem_init(char **cmdline_p)
 	mips_parse_crashkernel();
 	device_tree_init();
 
-	/*
-	 * In order to reduce the possibility of kernel panic when failed to
-	 * get IO TLB memory under CONFIG_SWIOTLB, it is better to allocate
-	 * low memory as small as possible before plat_swiotlb_setup(), so
-	 * make sparse_init() using top-down allocation.
-	 */
-	memblock_set_bottom_up(false);
-	sparse_init();
-	memblock_set_bottom_up(true);
-
 	plat_swiotlb_setup();
 
 	dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
@@ -789,7 +779,7 @@ void __init setup_arch(char **cmdline_p)
 	prefill_possible_map();
 
 	cpu_cache_init();
-	paging_init();
+	pagetable_init();
 
 	memblock_dump_all();
 
diff --git a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c
index 22d4f9ff3ae2..b01ebaace48e 100644
--- a/arch/mips/kernel/smp-cps.c
+++ b/arch/mips/kernel/smp-cps.c
@@ -341,9 +341,8 @@ static void __init cps_prepare_cpus(unsigned int max_cpus)
 
 	/* Allocate cluster boot configuration structs */
 	nclusters = mips_cps_numclusters();
-	mips_cps_cluster_bootcfg = kcalloc(nclusters,
-					   sizeof(*mips_cps_cluster_bootcfg),
-					   GFP_KERNEL);
+	mips_cps_cluster_bootcfg = kzalloc_objs(*mips_cps_cluster_bootcfg,
+						nclusters);
 	if (!mips_cps_cluster_bootcfg)
 		goto err_out;
 
@@ -353,8 +352,7 @@ static void __init cps_prepare_cpus(unsigned int max_cpus)
 	for (cl = 0; cl < nclusters; cl++) {
 		/* Allocate core boot configuration structs */
 		ncores = mips_cps_numcores(cl);
-		core_bootcfg = kcalloc(ncores, sizeof(*core_bootcfg),
-					GFP_KERNEL);
+		core_bootcfg = kzalloc_objs(*core_bootcfg, ncores);
 		if (!core_bootcfg)
 			goto err_out;
 		mips_cps_cluster_bootcfg[cl].core_config = core_bootcfg;
@@ -369,9 +367,8 @@ static void __init cps_prepare_cpus(unsigned int max_cpus)
 		for (c = 0; c < ncores; c++) {
 			int v;
 			core_vpes = core_vpe_count(cl, c);
-			core_bootcfg[c].vpe_config = kcalloc(core_vpes,
-					sizeof(*core_bootcfg[c].vpe_config),
-					GFP_KERNEL);
+			core_bootcfg[c].vpe_config = kzalloc_objs(*core_bootcfg[c].vpe_config,
+								  core_vpes);
 			for (v = 0; v < core_vpes; v++)
 				cpumask_set_cpu(nvpe++, &mips_cps_cluster_bootcfg[cl].cpumask);
 			if (!core_bootcfg[c].vpe_config)
diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl
index 8cedc83c3266..7430714e2b8f 100644
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -409,3 +409,4 @@
 468	n32	file_getattr			sys_file_getattr
 469	n32	file_setattr			sys_file_setattr
 470	n32	listns				sys_listns
+471	n32	rseq_slice_yield		sys_rseq_slice_yield
diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl
index 9b92bddf06b5..630aab9e5425 100644
--- a/arch/mips/kernel/syscalls/syscall_n64.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n64.tbl
@@ -385,3 +385,4 @@
 468	n64	file_getattr			sys_file_getattr
 469	n64	file_setattr			sys_file_setattr
 470	n64	listns				sys_listns
+471	n64	rseq_slice_yield		sys_rseq_slice_yield
diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index f810b8a55716..128653112284 100644
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -458,3 +458,4 @@
 468	o32	file_getattr			sys_file_getattr
 469	o32	file_setattr			sys_file_setattr
 470	o32	listns				sys_listns
+471	o32	rseq_slice_yield		sys_rseq_slice_yield
diff --git a/arch/mips/kernel/uprobes.c b/arch/mips/kernel/uprobes.c
index 401b148f8917..05cfc320992b 100644
--- a/arch/mips/kernel/uprobes.c
+++ b/arch/mips/kernel/uprobes.c
@@ -214,11 +214,11 @@ void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
 	unsigned long kaddr, kstart;
 
 	/* Initialize the slot */
-	kaddr = (unsigned long)kmap_atomic(page);
+	kaddr = (unsigned long)kmap_local_page(page);
 	kstart = kaddr + (vaddr & ~PAGE_MASK);
 	memcpy((void *)kstart, src, len);
 	flush_icache_range(kstart, kstart + len);
-	kunmap_atomic((void *)kaddr);
+	kunmap_local((void *)kaddr);
 }
 
 /**
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index 2b67c44adab9..b05ee21a1d67 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -94,7 +94,7 @@ struct vpe *alloc_vpe(int minor)
 {
 	struct vpe *v;
 
-	v = kzalloc(sizeof(struct vpe), GFP_KERNEL);
+	v = kzalloc_obj(struct vpe);
 	if (v == NULL)
 		goto out;
 
@@ -115,7 +115,7 @@ struct tc *alloc_tc(int index)
 {
 	struct tc *tc;
 
-	tc = kzalloc(sizeof(struct tc), GFP_KERNEL);
+	tc = kzalloc_obj(struct tc);
 	if (tc == NULL)
 		goto out;
 
@@ -318,7 +318,7 @@ static int apply_r_mips_hi16(struct module *me, uint32_t *location,
 	 * the carry we need to add.  Save the information, and let LO16 do the
 	 * actual relocation.
 	 */
-	n = kmalloc(sizeof(*n), GFP_KERNEL);
+	n = kmalloc_obj(*n);
 	if (!n)
 		return -ENOMEM;