summaryrefslogtreecommitdiff
path: root/arch/powerpc/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/dt_cpu_ftrs.c10
-rw-r--r--arch/powerpc/kernel/idle.c2
-rw-r--r--arch/powerpc/kernel/interrupt.c4
-rw-r--r--arch/powerpc/kernel/iommu.c2
-rw-r--r--arch/powerpc/kernel/misc_32.S26
-rw-r--r--arch/powerpc/kernel/module_64.c24
-rw-r--r--arch/powerpc/kernel/pci_32.c5
-rw-r--r--arch/powerpc/kernel/process.c4
-rw-r--r--arch/powerpc/kernel/prom_init.c39
-rw-r--r--arch/powerpc/kernel/setup-common.c9
-rw-r--r--arch/powerpc/kernel/setup_32.c8
-rw-r--r--arch/powerpc/kernel/trace/ftrace.c8
-rw-r--r--arch/powerpc/kernel/trace/ftrace_64_pg.c16
-rw-r--r--arch/powerpc/kernel/vdso32_wrapper.S2
-rw-r--r--arch/powerpc/kernel/vdso64_wrapper.S2
15 files changed, 60 insertions, 101 deletions
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index 1bee15c013e7..3af6c06af02f 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -1087,12 +1087,10 @@ static int __init dt_cpu_ftrs_scan_callback(unsigned long node, const char
/* Count and allocate space for cpu features */
of_scan_flat_dt_subnodes(node, count_cpufeatures_subnodes,
&nr_dt_cpu_features);
- dt_cpu_features = memblock_alloc(sizeof(struct dt_cpu_feature) * nr_dt_cpu_features, PAGE_SIZE);
- if (!dt_cpu_features)
- panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
- __func__,
- sizeof(struct dt_cpu_feature) * nr_dt_cpu_features,
- PAGE_SIZE);
+ dt_cpu_features =
+ memblock_alloc_or_panic(
+ sizeof(struct dt_cpu_feature) * nr_dt_cpu_features,
+ PAGE_SIZE);
cpufeatures_setup_start(isa);
diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c
index 30b56c67fa61..e527cd3ef128 100644
--- a/arch/powerpc/kernel/idle.c
+++ b/arch/powerpc/kernel/idle.c
@@ -97,7 +97,7 @@ void power4_idle(void)
/*
* Register the sysctl to set/clear powersave_nap.
*/
-static struct ctl_table powersave_nap_ctl_table[] = {
+static const struct ctl_table powersave_nap_ctl_table[] = {
{
.procname = "powersave-nap",
.data = &powersave_nap,
diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
index af62ec974b97..8f4acc55407b 100644
--- a/arch/powerpc/kernel/interrupt.c
+++ b/arch/powerpc/kernel/interrupt.c
@@ -185,7 +185,7 @@ again:
ti_flags = read_thread_flags();
while (unlikely(ti_flags & (_TIF_USER_WORK_MASK & ~_TIF_RESTORE_TM))) {
local_irq_enable();
- if (ti_flags & _TIF_NEED_RESCHED) {
+ if (ti_flags & (_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY)) {
schedule();
} else {
/*
@@ -396,7 +396,7 @@ notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs)
/* Returning to a kernel context with local irqs enabled. */
WARN_ON_ONCE(!(regs->msr & MSR_EE));
again:
- if (IS_ENABLED(CONFIG_PREEMPT)) {
+ if (IS_ENABLED(CONFIG_PREEMPTION)) {
/* Return to preemptible kernel context */
if (unlikely(read_thread_flags() & _TIF_NEED_RESCHED)) {
if (preempt_count() == 0)
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 76381e14e800..0ebae6e4c19d 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -687,7 +687,7 @@ void iommu_table_clear(struct iommu_table *tbl)
void iommu_table_reserve_pages(struct iommu_table *tbl,
unsigned long res_start, unsigned long res_end)
{
- int i;
+ unsigned long i;
WARN_ON_ONCE(res_end < res_start);
/*
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 033cd00aa0fc..acb727f54e9d 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -28,32 +28,6 @@
.text
/*
- * This returns the high 64 bits of the product of two 64-bit numbers.
- */
-_GLOBAL(mulhdu)
- cmpwi r6,0
- cmpwi cr1,r3,0
- mr r10,r4
- mulhwu r4,r4,r5
- beq 1f
- mulhwu r0,r10,r6
- mullw r7,r10,r5
- addc r7,r0,r7
- addze r4,r4
-1: beqlr cr1 /* all done if high part of A is 0 */
- mullw r9,r3,r5
- mulhwu r10,r3,r5
- beq 2f
- mullw r0,r3,r6
- mulhwu r8,r3,r6
- addc r7,r0,r7
- adde r4,r4,r8
- addze r10,r10
-2: addc r4,r4,r9
- addze r3,r10
- blr
-
-/*
* reloc_got2 runs through the .got2 section adding an offset
* to each entry.
*/
diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 45dac7b46aa3..34a5aec4908f 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -369,6 +369,24 @@ static void dedotify_versions(struct modversion_info *vers,
}
}
+/* Same as normal versions, remove a leading dot if present. */
+static void dedotify_ext_version_names(char *str_seq, unsigned long size)
+{
+ unsigned long out = 0;
+ unsigned long in;
+ char last = '\0';
+
+ for (in = 0; in < size; in++) {
+ /* Skip one leading dot */
+ if (last == '\0' && str_seq[in] == '.')
+ in++;
+ last = str_seq[in];
+ str_seq[out++] = last;
+ }
+ /* Zero the trailing portion of the names table for robustness */
+ memset(&str_seq[out], 0, size - out);
+}
+
/*
* Undefined symbols which refer to .funcname, hack to funcname. Make .TOC.
* seem to be defined (value set later).
@@ -438,10 +456,12 @@ int module_frob_arch_sections(Elf64_Ehdr *hdr,
me->arch.toc_section = i;
if (sechdrs[i].sh_addralign < 8)
sechdrs[i].sh_addralign = 8;
- }
- else if (strcmp(secstrings+sechdrs[i].sh_name,"__versions")==0)
+ } else if (strcmp(secstrings + sechdrs[i].sh_name, "__versions") == 0)
dedotify_versions((void *)hdr + sechdrs[i].sh_offset,
sechdrs[i].sh_size);
+ else if (strcmp(secstrings + sechdrs[i].sh_name, "__version_ext_names") == 0)
+ dedotify_ext_version_names((void *)hdr + sechdrs[i].sh_offset,
+ sechdrs[i].sh_size);
if (sechdrs[i].sh_type == SHT_SYMTAB)
dedotify((void *)hdr + sechdrs[i].sh_offset,
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index ce0c8623e563..f8a3bd8cfae4 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -213,11 +213,8 @@ pci_create_OF_bus_map(void)
struct property* of_prop;
struct device_node *dn;
- of_prop = memblock_alloc(sizeof(struct property) + 256,
+ of_prop = memblock_alloc_or_panic(sizeof(struct property) + 256,
SMP_CACHE_BYTES);
- if (!of_prop)
- panic("%s: Failed to allocate %zu bytes\n", __func__,
- sizeof(struct property) + 256);
dn = of_find_node_by_path("/");
if (dn) {
memset(of_prop, -1, sizeof(struct property) + 256);
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 7b739b9a91ab..ef91f71e07c4 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1960,8 +1960,8 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
* address of _start and the second entry is the TOC
* value we need to use.
*/
- __get_user(entry, (unsigned long __user *)start);
- __get_user(toc, (unsigned long __user *)start+1);
+ get_user(entry, (unsigned long __user *)start);
+ get_user(toc, (unsigned long __user *)start+1);
/* Check whether the e_entry function descriptor entries
* need to be relocated before we can use them.
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 8e776ba39497..57082fac4668 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2792,7 +2792,6 @@ static void __init flatten_device_tree(void)
dt_struct_start, dt_struct_end);
}
-#ifdef CONFIG_PPC_CHRP
/*
* Pegasos and BriQ lacks the "ranges" property in the isa node
* Pegasos needs decimal IRQ 14/15, not hexadecimal
@@ -2843,11 +2842,7 @@ static void __init fixup_device_tree_chrp(void)
}
}
}
-#else
-#define fixup_device_tree_chrp()
-#endif
-#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
static void __init fixup_device_tree_pmac64(void)
{
phandle u3, i2c, mpic;
@@ -2887,11 +2882,7 @@ static void __init fixup_device_tree_pmac64(void)
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
&parent, sizeof(parent));
}
-#else
-#define fixup_device_tree_pmac64()
-#endif
-#ifdef CONFIG_PPC_PMAC
static void __init fixup_device_tree_pmac(void)
{
__be32 val = 1;
@@ -2911,11 +2902,7 @@ static void __init fixup_device_tree_pmac(void)
prom_setprop(node, NULL, "#size-cells", &val, sizeof(val));
}
}
-#else
-static inline void fixup_device_tree_pmac(void) { }
-#endif
-#ifdef CONFIG_PPC_EFIKA
/*
* The MPC5200 FEC driver requires an phy-handle property to tell it how
* to talk to the phy. If the phy-handle property is missing, then this
@@ -3047,11 +3034,7 @@ static void __init fixup_device_tree_efika(void)
/* Make sure ethernet phy-handle property exists */
fixup_device_tree_efika_add_phy();
}
-#else
-#define fixup_device_tree_efika()
-#endif
-#ifdef CONFIG_PPC_PASEMI_NEMO
/*
* CFE supplied on Nemo is broken in several ways, biggest
* problem is that it reassigns ISA interrupts to unused mpic ints.
@@ -3127,17 +3110,23 @@ static void __init fixup_device_tree_pasemi(void)
prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
}
-#else /* !CONFIG_PPC_PASEMI_NEMO */
-static inline void fixup_device_tree_pasemi(void) { }
-#endif
static void __init fixup_device_tree(void)
{
- fixup_device_tree_chrp();
- fixup_device_tree_pmac();
- fixup_device_tree_pmac64();
- fixup_device_tree_efika();
- fixup_device_tree_pasemi();
+ if (IS_ENABLED(CONFIG_PPC_CHRP))
+ fixup_device_tree_chrp();
+
+ if (IS_ENABLED(CONFIG_PPC_PMAC))
+ fixup_device_tree_pmac();
+
+ if (IS_ENABLED(CONFIG_PPC_PMAC) && IS_ENABLED(CONFIG_PPC64))
+ fixup_device_tree_pmac64();
+
+ if (IS_ENABLED(CONFIG_PPC_EFIKA))
+ fixup_device_tree_efika();
+
+ if (IS_ENABLED(CONFIG_PPC_PASEMI_NEMO))
+ fixup_device_tree_pasemi();
}
static void __init prom_find_boot_cpu(void)
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 6fa179448c33..a08b0ede4e64 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -458,11 +458,8 @@ void __init smp_setup_cpu_maps(void)
DBG("smp_setup_cpu_maps()\n");
- cpu_to_phys_id = memblock_alloc(nr_cpu_ids * sizeof(u32),
+ cpu_to_phys_id = memblock_alloc_or_panic(nr_cpu_ids * sizeof(u32),
__alignof__(u32));
- if (!cpu_to_phys_id)
- panic("%s: Failed to allocate %zu bytes align=0x%zx\n",
- __func__, nr_cpu_ids * sizeof(u32), __alignof__(u32));
for_each_node_by_type(dn, "cpu") {
const __be32 *intserv;
@@ -834,8 +831,8 @@ static int __init check_cache_coherency(void)
if (devtree_coherency != KERNEL_COHERENCY) {
printk(KERN_ERR
"kernel coherency:%s != device tree_coherency:%s\n",
- KERNEL_COHERENCY ? "on" : "off",
- devtree_coherency ? "on" : "off");
+ str_on_off(KERNEL_COHERENCY),
+ str_on_off(devtree_coherency));
BUG();
}
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 75dbf3e0d9c4..5a1bf501fbe1 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -140,13 +140,7 @@ arch_initcall(ppc_init);
static void *__init alloc_stack(void)
{
- void *ptr = memblock_alloc(THREAD_SIZE, THREAD_ALIGN);
-
- if (!ptr)
- panic("cannot allocate %d bytes for stack at %pS\n",
- THREAD_SIZE, (void *)_RET_IP_);
-
- return ptr;
+ return memblock_alloc_or_panic(THREAD_SIZE, THREAD_ALIGN);
}
void __init irqstack_early_init(void)
diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c
index 5ccd791761e8..2f776f137a89 100644
--- a/arch/powerpc/kernel/trace/ftrace.c
+++ b/arch/powerpc/kernel/trace/ftrace.c
@@ -658,7 +658,6 @@ void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct ftrace_regs *fregs)
{
unsigned long sp = arch_ftrace_regs(fregs)->regs.gpr[1];
- int bit;
if (unlikely(ftrace_graph_is_dead()))
goto out;
@@ -666,14 +665,9 @@ void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
if (unlikely(atomic_read(&current->tracing_graph_pause)))
goto out;
- bit = ftrace_test_recursion_trylock(ip, parent_ip);
- if (bit < 0)
- goto out;
-
- if (!function_graph_enter(parent_ip, ip, 0, (unsigned long *)sp))
+ if (!function_graph_enter_regs(parent_ip, ip, 0, (unsigned long *)sp, fregs))
parent_ip = ppc_function_entry(return_to_handler);
- ftrace_test_recursion_unlock(bit);
out:
arch_ftrace_regs(fregs)->regs.link = parent_ip;
}
diff --git a/arch/powerpc/kernel/trace/ftrace_64_pg.c b/arch/powerpc/kernel/trace/ftrace_64_pg.c
index 98787376eb87..ac35015f04c6 100644
--- a/arch/powerpc/kernel/trace/ftrace_64_pg.c
+++ b/arch/powerpc/kernel/trace/ftrace_64_pg.c
@@ -787,10 +787,10 @@ int ftrace_disable_ftrace_graph_caller(void)
* in current thread info. Return the address we want to divert to.
*/
static unsigned long
-__prepare_ftrace_return(unsigned long parent, unsigned long ip, unsigned long sp)
+__prepare_ftrace_return(unsigned long parent, unsigned long ip, unsigned long sp,
+ struct ftrace_regs *fregs)
{
unsigned long return_hooker;
- int bit;
if (unlikely(ftrace_graph_is_dead()))
goto out;
@@ -798,16 +798,11 @@ __prepare_ftrace_return(unsigned long parent, unsigned long ip, unsigned long sp
if (unlikely(atomic_read(&current->tracing_graph_pause)))
goto out;
- bit = ftrace_test_recursion_trylock(ip, parent);
- if (bit < 0)
- goto out;
-
return_hooker = ppc_function_entry(return_to_handler);
- if (!function_graph_enter(parent, ip, 0, (unsigned long *)sp))
+ if (!function_graph_enter_regs(parent, ip, 0, (unsigned long *)sp, fregs))
parent = return_hooker;
- ftrace_test_recursion_unlock(bit);
out:
return parent;
}
@@ -816,13 +811,14 @@ out:
void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct ftrace_regs *fregs)
{
- arch_ftrace_regs(fregs)->regs.link = __prepare_ftrace_return(parent_ip, ip, arch_ftrace_regs(fregs)->regs.gpr[1]);
+ arch_ftrace_regs(fregs)->regs.link = __prepare_ftrace_return(parent_ip, ip,
+ arch_ftrace_regs(fregs)->regs.gpr[1], fregs);
}
#else
unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
unsigned long sp)
{
- return __prepare_ftrace_return(parent, ip, sp);
+ return __prepare_ftrace_return(parent, ip, sp, NULL);
}
#endif
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
diff --git a/arch/powerpc/kernel/vdso32_wrapper.S b/arch/powerpc/kernel/vdso32_wrapper.S
index 10f92f265d51..20bca3548b44 100644
--- a/arch/powerpc/kernel/vdso32_wrapper.S
+++ b/arch/powerpc/kernel/vdso32_wrapper.S
@@ -2,7 +2,7 @@
#include <linux/linkage.h>
#include <asm/page.h>
- __PAGE_ALIGNED_DATA
+ .section ".data..ro_after_init", "aw"
.globl vdso32_start, vdso32_end
.balign PAGE_SIZE
diff --git a/arch/powerpc/kernel/vdso64_wrapper.S b/arch/powerpc/kernel/vdso64_wrapper.S
index 839d1a61411d..1912936fa227 100644
--- a/arch/powerpc/kernel/vdso64_wrapper.S
+++ b/arch/powerpc/kernel/vdso64_wrapper.S
@@ -2,7 +2,7 @@
#include <linux/linkage.h>
#include <asm/page.h>
- __PAGE_ALIGNED_DATA
+ .section ".data..ro_after_init", "aw"
.globl vdso64_start, vdso64_end
.balign PAGE_SIZE
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-08-18 09:12:27 +0000