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ARM development updates for 5.18:

Browse source 
- amba bus cleanups
 - conversion to use reserve_initrd_mem()
 - remove -nostdlib from vdso link
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:

 - amba bus cleanups

 - conversion to use reserve_initrd_mem()

 - remove -nostdlib from vdso link

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9181/1: vdso: remove -nostdlib compiler flag
  ARM: 9175/1: Convert to reserve_initrd_mem()
  ARM: 9174/1: amba: Move EXPORT_SYMBOL() closer to definition
  ARM: 9173/1: amba: kill amba_find_match()
  ARM: 9172/1: amba: Cleanup amba pclk operation
This commit is contained in:
Linus Torvalds 2022-03-21 10:55:18 -07:00
commit 90ea15b7c9
5 changed files with 9 additions and 134 deletions
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43
arch/arm/mm/init.c
View file

@ -164,47 +164,6 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
return phys;
}
static void __init arm_initrd_init(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
phys_addr_t start;
unsigned long size;
initrd_start = initrd_end = 0;
if (!phys_initrd_size)
return;
/*
* Round the memory region to page boundaries as per free_initrd_mem()
* This allows us to detect whether the pages overlapping the initrd
* are in use, but more importantly, reserves the entire set of pages
* as we don't want these pages allocated for other purposes.
*/
start = round_down(phys_initrd_start, PAGE_SIZE);
size = phys_initrd_size + (phys_initrd_start - start);
size = round_up(size, PAGE_SIZE);
if (!memblock_is_region_memory(start, size)) {
pr_err("INITRD: 0x%08llx+0x%08lx is not a memory region - disabling initrd\n",
(u64)start, size);
return;
}
if (memblock_is_region_reserved(start, size)) {
pr_err("INITRD: 0x%08llx+0x%08lx overlaps in-use memory region - disabling initrd\n",
(u64)start, size);
return;
}
memblock_reserve(start, size);
/* Now convert initrd to virtual addresses */
initrd_start = __phys_to_virt(phys_initrd_start);
initrd_end = initrd_start + phys_initrd_size;
#endif
}
#ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND
void check_cpu_icache_size(int cpuid)
{
@ -226,7 +185,7 @@ void __init arm_memblock_init(const struct machine_desc *mdesc)
/* Register the kernel text, kernel data and initrd with memblock. */
memblock_reserve(__pa(KERNEL_START), KERNEL_END - KERNEL_START);
arm_initrd_init();
reserve_initrd_mem();
arm_mm_memblock_reserve();

2
arch/arm/vdso/Makefile
View file

@ -18,7 +18,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO32
ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8
ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
-z max-page-size=4096 -nostdlib -shared $(ldflags-y) \
-z max-page-size=4096 -shared $(ldflags-y) \
--hash-style=sysv --build-id=sha1 \
-T

73
drivers/amba/bus.c
View file

@ -370,6 +370,7 @@ int amba_driver_register(struct amba_driver *drv)
return driver_register(&drv->drv);
}
EXPORT_SYMBOL(amba_driver_register);
/**
* amba_driver_unregister - remove an AMBA device driver
@ -383,7 +384,7 @@ void amba_driver_unregister(struct amba_driver *drv)
{
driver_unregister(&drv->drv);
}
EXPORT_SYMBOL(amba_driver_unregister);
static void amba_device_release(struct device *dev)
{
@ -642,6 +643,7 @@ int amba_device_register(struct amba_device *dev, struct resource *parent)
return amba_device_add(dev, parent);
}
EXPORT_SYMBOL(amba_device_register);
/**
* amba_device_put - put an AMBA device
@ -668,66 +670,7 @@ void amba_device_unregister(struct amba_device *dev)
{
device_unregister(&dev->dev);
}
struct find_data {
struct amba_device *dev;
struct device *parent;
const char *busid;
unsigned int id;
unsigned int mask;
};
static int amba_find_match(struct device *dev, void *data)
{
struct find_data *d = data;
struct amba_device *pcdev = to_amba_device(dev);
int r;
r = (pcdev->periphid & d->mask) == d->id;
if (d->parent)
r &= d->parent == dev->parent;
if (d->busid)
r &= strcmp(dev_name(dev), d->busid) == 0;
if (r) {
get_device(dev);
d->dev = pcdev;
}
return r;
}
/**
* amba_find_device - locate an AMBA device given a bus id
* @busid: bus id for device (or NULL)
* @parent: parent device (or NULL)
* @id: peripheral ID (or 0)
* @mask: peripheral ID mask (or 0)
*
* Return the AMBA device corresponding to the supplied parameters.
* If no device matches, returns NULL.
*
* NOTE: When a valid device is found, its refcount is
* incremented, and must be decremented before the returned
* reference.
*/
struct amba_device *
amba_find_device(const char *busid, struct device *parent, unsigned int id,
unsigned int mask)
{
struct find_data data;
data.dev = NULL;
data.parent = parent;
data.busid = busid;
data.id = id;
data.mask = mask;
bus_for_each_dev(&amba_bustype, NULL, &data, amba_find_match);
return data.dev;
}
EXPORT_SYMBOL(amba_device_unregister);
/**
* amba_request_regions - request all mem regions associated with device
@ -749,6 +692,7 @@ int amba_request_regions(struct amba_device *dev, const char *name)
return ret;
}
EXPORT_SYMBOL(amba_request_regions);
/**
* amba_release_regions - release mem regions associated with device
@ -763,11 +707,4 @@ void amba_release_regions(struct amba_device *dev)
size = resource_size(&dev->res);
release_mem_region(dev->res.start, size);
}
EXPORT_SYMBOL(amba_driver_register);
EXPORT_SYMBOL(amba_driver_unregister);
EXPORT_SYMBOL(amba_device_register);
EXPORT_SYMBOL(amba_device_unregister);
EXPORT_SYMBOL(amba_find_device);
EXPORT_SYMBOL(amba_request_regions);
EXPORT_SYMBOL(amba_release_regions);

4
drivers/dma/pl330.c
View file

@ -2968,7 +2968,7 @@ static int __maybe_unused pl330_suspend(struct device *dev)
struct amba_device *pcdev = to_amba_device(dev);
pm_runtime_force_suspend(dev);
amba_pclk_unprepare(pcdev);
clk_unprepare(pcdev->pclk);
return 0;
}
@ -2978,7 +2978,7 @@ static int __maybe_unused pl330_resume(struct device *dev)
struct amba_device *pcdev = to_amba_device(dev);
int ret;
ret = amba_pclk_prepare(pcdev);
ret = clk_prepare(pcdev->pclk);
if (ret)
return ret;

21
include/linux/amba/bus.h
View file

@ -117,30 +117,9 @@ void amba_device_put(struct amba_device *);
int amba_device_add(struct amba_device *, struct resource *);
int amba_device_register(struct amba_device *, struct resource *);
void amba_device_unregister(struct amba_device *);
struct amba_device *amba_find_device(const char *, struct device *, unsigned int, unsigned int);
int amba_request_regions(struct amba_device *, const char *);
void amba_release_regions(struct amba_device *);
static inline int amba_pclk_enable(struct amba_device *dev)
{
return clk_enable(dev->pclk);
}
static inline void amba_pclk_disable(struct amba_device *dev)
{
clk_disable(dev->pclk);
}
static inline int amba_pclk_prepare(struct amba_device *dev)
{
return clk_prepare(dev->pclk);
}
static inline void amba_pclk_unprepare(struct amba_device *dev)
{
clk_unprepare(dev->pclk);
}
/* Some drivers don't use the struct amba_device */
#define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff)
#define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f)