On Sat, 2010-05-08 at 08:17 -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. > > -v2: use ARCH_DISCARD_LMB according to Michael Ellerman So first, you don't define ARCH_DISCARD_LMB on any arch, so they will all use __init_lmb, but thta isnt defined by this patch afaik, so you have just broken everything no ? Also, why do you want that precisely ? bootmem is __init so that's fine to discard. We also already don't discard the lmb arrays. So what are you trying to achieve ? Cheers, Ben. > Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> > --- > include/linux/lmb.h | 8 +++++++ > mm/lmb.c | 54 ++++++++++++++++++++++++++++++-------------------- > 2 files changed, 40 insertions(+), 22 deletions(-) > > diff --git a/include/linux/lmb.h b/include/linux/lmb.h > index 47b9d7f..e486572 100644 > --- a/include/linux/lmb.h > +++ b/include/linux/lmb.h > @@ -107,6 +107,14 @@ u64 lmb_memory_size(u64 addr, u64 limit); > > #include <asm/lmb.h> > > +#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/mm/lmb.c b/mm/lmb.c > index db2264d..c2c6bff 100644 > --- a/mm/lmb.c > +++ b/mm/lmb.c > @@ -21,11 +21,11 @@ > > #define LMB_ALLOC_ANYWHERE 0 > > -struct lmb lmb; > -static struct lmb_property lmb_memory_region[MAX_LMB_REGIONS]; > -static struct lmb_property lmb_reserved_region[MAX_LMB_REGIONS]; > +struct lmb lmb __initdata_lmb; > +static struct lmb_property lmb_memory_region[MAX_LMB_REGIONS] __initdata_lmb; > +static struct lmb_property lmb_reserved_region[MAX_LMB_REGIONS] __initdata_lmb; > > -static int lmb_debug; > +static int lmb_debug __initdata_lmb; > > static int __init early_lmb(char *p) > { > @@ -35,7 +35,7 @@ static int __init early_lmb(char *p) > } > early_param("lmb", early_lmb); > > -static void lmb_dump(struct lmb_region *region, char *name) > +static void __init_lmb lmb_dump(struct lmb_region *region, char *name) > { > unsigned long long base, size; > int i; > @@ -51,7 +51,7 @@ static void lmb_dump(struct lmb_region *region, char *name) > } > } > > -void lmb_dump_all(void) > +void __init_lmb lmb_dump_all(void) > { > if (!lmb_debug) > return; > @@ -64,13 +64,13 @@ void lmb_dump_all(void) > lmb_dump(&lmb.reserved, "reserved"); > } > > -static unsigned long lmb_addrs_overlap(u64 base1, u64 size1, u64 base2, > +static unsigned long __init_lmb lmb_addrs_overlap(u64 base1, u64 size1, u64 base2, > u64 size2) > { > return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); > } > > -static long lmb_addrs_adjacent(u64 base1, u64 size1, u64 base2, u64 size2) > +static long __init_lmb lmb_addrs_adjacent(u64 base1, u64 size1, u64 base2, u64 size2) > { > if (base2 == base1 + size1) > return 1; > @@ -80,7 +80,7 @@ static long lmb_addrs_adjacent(u64 base1, u64 size1, u64 base2, u64 size2) > return 0; > } > > -static long lmb_regions_adjacent(struct lmb_region *rgn, > +static long __init_lmb lmb_regions_adjacent(struct lmb_region *rgn, > unsigned long r1, unsigned long r2) > { > u64 base1 = rgn->region[r1].base; > @@ -91,7 +91,7 @@ static long lmb_regions_adjacent(struct lmb_region *rgn, > return lmb_addrs_adjacent(base1, size1, base2, size2); > } > > -static void lmb_remove_region(struct lmb_region *rgn, unsigned long r) > +static void __init_lmb lmb_remove_region(struct lmb_region *rgn, unsigned long r) > { > unsigned long i; > > @@ -103,7 +103,7 @@ static void lmb_remove_region(struct lmb_region *rgn, unsigned long r) > } > > /* Assumption: base addr of region 1 < base addr of region 2 */ > -static void lmb_coalesce_regions(struct lmb_region *rgn, > +static void __init_lmb lmb_coalesce_regions(struct lmb_region *rgn, > unsigned long r1, unsigned long r2) > { > rgn->region[r1].size += rgn->region[r2].size; > @@ -140,7 +140,7 @@ void __init lmb_analyze(void) > lmb.memory.size += lmb.memory.region[i].size; > } > > -static long lmb_add_region(struct lmb_region *rgn, u64 base, u64 size) > +static long __init_lmb lmb_add_region(struct lmb_region *rgn, u64 base, u64 size) > { > unsigned long coalesced = 0; > long adjacent, i; > @@ -204,7 +204,7 @@ static long lmb_add_region(struct lmb_region *rgn, u64 base, u64 size) > return 0; > } > > -long lmb_add(u64 base, u64 size) > +long __init_lmb lmb_add(u64 base, u64 size) > { > struct lmb_region *_rgn = &lmb.memory; > > @@ -216,7 +216,7 @@ long lmb_add(u64 base, u64 size) > > } > > -static long __lmb_remove(struct lmb_region *rgn, u64 base, u64 size) > +static long __init_lmb __lmb_remove(struct lmb_region *rgn, u64 base, u64 size) > { > u64 rgnbegin, rgnend; > u64 end = base + size; > @@ -264,7 +264,7 @@ static long __lmb_remove(struct lmb_region *rgn, u64 base, u64 size) > return lmb_add_region(rgn, end, rgnend - end); > } > > -long lmb_remove(u64 base, u64 size) > +long __init_lmb lmb_remove(u64 base, u64 size) > { > return __lmb_remove(&lmb.memory, base, size); > } > @@ -283,7 +283,7 @@ long __init lmb_reserve(u64 base, u64 size) > return lmb_add_region(_rgn, base, size); > } > > -long lmb_overlaps_region(struct lmb_region *rgn, u64 base, u64 size) > +long __init_lmb lmb_overlaps_region(struct lmb_region *rgn, u64 base, u64 size) > { > unsigned long i; > > @@ -297,12 +297,12 @@ long lmb_overlaps_region(struct lmb_region *rgn, u64 base, u64 size) > return (i < rgn->cnt) ? i : -1; > } > > -static u64 lmb_align_down(u64 addr, u64 size) > +static u64 __init_lmb lmb_align_down(u64 addr, u64 size) > { > return addr & ~(size - 1); > } > > -static u64 lmb_align_up(u64 addr, u64 size) > +static u64 __init_lmb lmb_align_up(u64 addr, u64 size) > { > return (addr + (size - 1)) & ~(size - 1); > } > @@ -462,7 +462,7 @@ u64 __init lmb_phys_mem_size(void) > return lmb.memory.size; > } > > -u64 lmb_end_of_DRAM(void) > +u64 __init_lmb lmb_end_of_DRAM(void) > { > int idx = lmb.memory.cnt - 1; > > @@ -526,7 +526,7 @@ int __init lmb_is_reserved(u64 addr) > return 0; > } > > -int lmb_is_region_reserved(u64 base, u64 size) > +int __init_lmb lmb_is_region_reserved(u64 base, u64 size) > { > return lmb_overlaps_region(&lmb.reserved, base, size); > } > @@ -535,7 +535,7 @@ int lmb_is_region_reserved(u64 base, u64 size) > * Given a <base, len>, find which memory regions belong to this range. > * Adjust the request and return a contiguous chunk. > */ > -int lmb_find(struct lmb_property *res) > +int __init_lmb lmb_find(struct lmb_property *res) > { > int i; > u64 rstart, rend; > @@ -689,10 +689,11 @@ static void __init subtract_lmb_reserved(struct range *range, int az) > int i, count; > u64 final_start, final_end; > > +#ifdef ARCH_DISCARD_LMB > /* Take out region array itself at first*/ > if (lmb.reserved.region != lmb_reserved_region) > lmb_free(__pa(lmb.reserved.region), sizeof(struct lmb_property) * lmb.reserved.nr_regions); > - > +#endif > count = lmb.reserved.cnt; > > if (lmb_debug) > @@ -708,9 +709,11 @@ static void __init subtract_lmb_reserved(struct range *range, int az) > continue; > subtract_range(range, az, final_start, final_end); > } > +#ifdef ARCH_DISCARD_LMB > /* Put region array back ? */ > if (lmb.reserved.region != lmb_reserved_region) > lmb_reserve(__pa(lmb.reserved.region), sizeof(struct lmb_property) * lmb.reserved.nr_regions); > +#endif > } > > int __init get_free_all_memory_range(struct range **rangep, int nodeid) > @@ -735,6 +738,7 @@ int __init get_free_all_memory_range(struct range **rangep, int nodeid) > subtract_lmb_reserved(range, count); > nr_range = clean_sort_range(range, count); > > +#ifdef ARCH_DISCARD_LMB > /* Need to clear it ? */ > if (nodeid == MAX_NUMNODES) { > memset(&lmb.reserved.region[0], 0, sizeof(struct lmb_property) * lmb.reserved.nr_regions); > @@ -742,6 +746,7 @@ int __init get_free_all_memory_range(struct range **rangep, int nodeid) > lmb.reserved.nr_regions = 0; > lmb.reserved.cnt = 0; > } > +#endif > > *rangep = range; > return nr_range; > @@ -752,9 +757,11 @@ void __init lmb_to_bootmem(u64 start, u64 end) > int i, count; > u64 final_start, final_end; > > +#ifdef ARCH_DISCARD_LMB > /* Take out region array itself */ > if (lmb.reserved.region != lmb_reserved_region) > lmb_free(__pa(lmb.reserved.region), sizeof(struct lmb_property) * lmb.reserved.nr_regions); > +#endif > > count = lmb.reserved.cnt; > if (lmb_debug) > @@ -774,11 +781,14 @@ void __init lmb_to_bootmem(u64 start, u64 end) > pr_cont(" ==> [%010llx - %010llx]\n", final_start, final_end); > reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT); > } > + > +#ifdef ARCH_DISCARD_LMB > /* Clear them to avoid misusing ? */ > memset(&lmb.reserved.region[0], 0, sizeof(struct lmb_property) * lmb.reserved.nr_regions); > lmb.reserved.region = NULL; > lmb.reserved.nr_regions = 0; > lmb.reserved.cnt = 0; > +#endif > } > #endif > -- 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