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sparc32: split ramdisk detection and reservation to a helper function 

The detection and reservation of ramdisk memory were separated to allow
bootmem bitmap initialization after the ramdisk boundaries are detected.
Since the bootmem initialization is removed, the reservation of ramdisk
memory is done immediately after its boundaries are found.

Split the entire block into a separate helper function.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mike Rapoport 2018-08-06 13:52:35 +03:00 committed by David S. Miller
parent cca079ef8a
commit 8818d89cf8
1 changed files with 31 additions and 25 deletions
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56
arch/sparc/mm/init_32.c
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@ -102,6 +102,36 @@ static unsigned long calc_max_low_pfn(void)
return tmp;
}
static void __init find_ramdisk(unsigned long end_of_phys_memory)
{
#ifdef CONFIG_BLK_DEV_INITRD
unsigned long size;
/* Now have to check initial ramdisk, so that it won't pass
* the end of memory
*/
if (sparc_ramdisk_image) {
if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
sparc_ramdisk_image -= KERNBASE;
initrd_start = sparc_ramdisk_image + phys_base;
initrd_end = initrd_start + sparc_ramdisk_size;
if (initrd_end > end_of_phys_memory) {
printk(KERN_CRIT "initrd extends beyond end of memory "
"(0x%016lx > 0x%016lx)\ndisabling initrd\n",
initrd_end, end_of_phys_memory);
initrd_start = 0;
} else {
/* Reserve the initrd image area. */
size = initrd_end - initrd_start;
memblock_reserve(initrd_start, size);
initrd_start = (initrd_start - phys_base) + PAGE_OFFSET;
initrd_end = (initrd_end - phys_base) + PAGE_OFFSET;
}
}
#endif
}
unsigned long __init bootmem_init(unsigned long *pages_avail)
{
unsigned long start_pfn, bytes_avail, size;
@ -160,32 +190,8 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
high_pages >> (20 - PAGE_SHIFT));
}
#ifdef CONFIG_BLK_DEV_INITRD
/* Now have to check initial ramdisk, so that it won't pass
* the end of memory
*/
if (sparc_ramdisk_image) {
if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
sparc_ramdisk_image -= KERNBASE;
initrd_start = sparc_ramdisk_image + phys_base;
initrd_end = initrd_start + sparc_ramdisk_size;
if (initrd_end > end_of_phys_memory) {
printk(KERN_CRIT "initrd extends beyond end of memory "
"(0x%016lx > 0x%016lx)\ndisabling initrd\n",
initrd_end, end_of_phys_memory);
initrd_start = 0;
}
}
find_ramdisk(end_of_phys_memory);
if (initrd_start) {
/* Reserve the initrd image area. */
size = initrd_end - initrd_start;
memblock_reserve(initrd_start, size);
initrd_start = (initrd_start - phys_base) + PAGE_OFFSET;
initrd_end = (initrd_end - phys_base) + PAGE_OFFSET;
}
#endif
/* Reserve the kernel text/data/bss. */
size = (start_pfn << PAGE_SHIFT) - phys_base;
memblock_reserve(phys_base, size);