On Thu, 2010-05-13 at 17:19 -0700, Yinghai Lu wrote: > So those lmb bits could be released after kernel is booted up. > > Arch code could define ARCH_DISCARD_LMB in asm/lmb.h, > __init_lmb will become __init, __initdata_lmb will becom __initdata > > x86 code will use that. So you do not intend to use lmb after boot ? This will break the debugfs files unless you also remove those. Cheers, Ben. > -v2: use ARCH_DISCARD_LMB according to Michael Ellerman > > Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> > --- > include/linux/lmb.h | 8 ++++++++ > lib/lmb.c | 46 +++++++++++++++++++++++----------------------- > 2 files changed, 31 insertions(+), 23 deletions(-) > > diff --git a/include/linux/lmb.h b/include/linux/lmb.h > index 2b87641..0b073a3 100644 > --- a/include/linux/lmb.h > +++ b/include/linux/lmb.h > @@ -145,6 +145,14 @@ static inline unsigned long lmb_region_pages(const struct lmb_region *reg) > region++) > > > +#ifdef ARCH_DISCARD_LMB > +#define __init_lmb __init > +#define __initdata_lmb __initdata > +#else > +#define __init_lmb > +#define __initdata_lmb > +#endif > + > #endif /* CONFIG_HAVE_LMB */ > > #endif /* __KERNEL__ */ > diff --git a/lib/lmb.c b/lib/lmb.c > index fddd72c..6d49a17 100644 > --- a/lib/lmb.c > +++ b/lib/lmb.c > @@ -20,11 +20,11 @@ > #include <linux/seq_file.h> > #include <linux/lmb.h> > > -struct lmb lmb; > +struct lmb lmb __initdata_lmb; > > -int lmb_debug; > -static struct lmb_region lmb_memory_init_regions[INIT_LMB_REGIONS + 1]; > -struct lmb_region lmb_reserved_init_regions[INIT_LMB_REGIONS + 1]; > +int lmb_debug __initdata_lmb; > +static struct lmb_region lmb_memory_init_regions[INIT_LMB_REGIONS + 1] __initdata_lmb; > +struct lmb_region lmb_reserved_init_regions[INIT_LMB_REGIONS + 1] __initdata_lmb; > > /* inline so we don't get a warning when pr_debug is compiled out */ > static inline const char *lmb_type_name(struct lmb_type *type) > @@ -41,23 +41,23 @@ static inline const char *lmb_type_name(struct lmb_type *type) > * Address comparison utilities > */ > > -static phys_addr_t lmb_align_down(phys_addr_t addr, phys_addr_t size) > +static phys_addr_t __init_lmb lmb_align_down(phys_addr_t addr, phys_addr_t size) > { > return addr & ~(size - 1); > } > > -static phys_addr_t lmb_align_up(phys_addr_t addr, phys_addr_t size) > +static phys_addr_t __init_lmb lmb_align_up(phys_addr_t addr, phys_addr_t size) > { > return (addr + (size - 1)) & ~(size - 1); > } > > -static unsigned long lmb_addrs_overlap(phys_addr_t base1, phys_addr_t size1, > +static unsigned long __init_lmb lmb_addrs_overlap(phys_addr_t base1, phys_addr_t size1, > phys_addr_t base2, phys_addr_t size2) > { > return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); > } > > -static long lmb_addrs_adjacent(phys_addr_t base1, phys_addr_t size1, > +static long __init_lmb lmb_addrs_adjacent(phys_addr_t base1, phys_addr_t size1, > phys_addr_t base2, phys_addr_t size2) > { > if (base2 == base1 + size1) > @@ -68,7 +68,7 @@ static long lmb_addrs_adjacent(phys_addr_t base1, phys_addr_t size1, > return 0; > } > > -static long lmb_regions_adjacent(struct lmb_type *type, > +static long __init_lmb lmb_regions_adjacent(struct lmb_type *type, > unsigned long r1, unsigned long r2) > { > phys_addr_t base1 = type->regions[r1].base; > @@ -79,7 +79,7 @@ static long lmb_regions_adjacent(struct lmb_type *type, > return lmb_addrs_adjacent(base1, size1, base2, size2); > } > > -long lmb_overlaps_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size) > +long __init_lmb lmb_overlaps_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size) > { > unsigned long i; > > @@ -155,7 +155,7 @@ static phys_addr_t __init lmb_find_base(phys_addr_t size, phys_addr_t align, > return LMB_ERROR; > } > > -static void lmb_remove_region(struct lmb_type *type, unsigned long r) > +static void __init_lmb lmb_remove_region(struct lmb_type *type, unsigned long r) > { > unsigned long i; > > @@ -167,14 +167,14 @@ static void lmb_remove_region(struct lmb_type *type, unsigned long r) > } > > /* Assumption: base addr of region 1 < base addr of region 2 */ > -static void lmb_coalesce_regions(struct lmb_type *type, > +static void __init_lmb lmb_coalesce_regions(struct lmb_type *type, > unsigned long r1, unsigned long r2) > { > type->regions[r1].size += type->regions[r2].size; > lmb_remove_region(type, r2); > } > > -static int lmb_double_array(struct lmb_type *type) > +static int __init_lmb lmb_double_array(struct lmb_type *type) > { > struct lmb_region *new_array, *old_array; > phys_addr_t old_size, new_size, addr; > @@ -240,13 +240,13 @@ static int lmb_double_array(struct lmb_type *type) > return 0; > } > > -extern int __weak lmb_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1, > +extern int __init_lmb __weak lmb_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1, > phys_addr_t addr2, phys_addr_t size2) > { > return 1; > } > > -long lmb_add_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size) > +long __init_lmb lmb_add_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size) > { > unsigned long coalesced = 0; > long adjacent, i; > @@ -333,13 +333,13 @@ long lmb_add_region(struct lmb_type *type, phys_addr_t base, phys_addr_t size) > return 0; > } > > -long lmb_add(phys_addr_t base, phys_addr_t size) > +long __init_lmb lmb_add(phys_addr_t base, phys_addr_t size) > { > return lmb_add_region(&lmb.memory, base, size); > > } > > -static long __lmb_remove(struct lmb_type *type, phys_addr_t base, phys_addr_t size) > +static long __init_lmb __lmb_remove(struct lmb_type *type, phys_addr_t base, phys_addr_t size) > { > phys_addr_t rgnbegin, rgnend; > phys_addr_t end = base + size; > @@ -387,7 +387,7 @@ static long __lmb_remove(struct lmb_type *type, phys_addr_t base, phys_addr_t si > return lmb_add_region(type, end, rgnend - end); > } > > -long lmb_remove(phys_addr_t base, phys_addr_t size) > +long __init_lmb lmb_remove(phys_addr_t base, phys_addr_t size) > { > return __lmb_remove(&lmb.memory, base, size); > } > @@ -544,7 +544,7 @@ phys_addr_t __init lmb_phys_mem_size(void) > return lmb.memory_size; > } > > -phys_addr_t lmb_end_of_DRAM(void) > +phys_addr_t __init_lmb lmb_end_of_DRAM(void) > { > int idx = lmb.memory.cnt - 1; > > @@ -605,7 +605,7 @@ int __init lmb_is_reserved(phys_addr_t addr) > return 0; > } > > -int lmb_is_region_reserved(phys_addr_t base, phys_addr_t size) > +int __init_lmb lmb_is_region_reserved(phys_addr_t base, phys_addr_t size) > { > return lmb_overlaps_region(&lmb.reserved, base, size); > } > @@ -616,7 +616,7 @@ void __init lmb_set_current_limit(phys_addr_t limit) > lmb.current_limit = limit; > } > > -static void lmb_dump(struct lmb_type *region, char *name) > +static void __init_lmb lmb_dump(struct lmb_type *region, char *name) > { > unsigned long long base, size; > int i; > @@ -632,7 +632,7 @@ static void lmb_dump(struct lmb_type *region, char *name) > } > } > > -void lmb_dump_all(void) > +void __init_lmb lmb_dump_all(void) > { > if (!lmb_debug) > return; > @@ -695,7 +695,7 @@ static int __init early_lmb(char *p) > } > early_param("lmb", early_lmb); > > -#ifdef CONFIG_DEBUG_FS > +#if defined(CONFIG_DEBUG_FS) && !defined(ARCH_DISCARD_LMB) > > static int lmb_debug_show(struct seq_file *m, void *private) > { -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html