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Commit 24551f64 authored by Michael Ellerman's avatar Michael Ellerman Committed by Benjamin Herrenschmidt
Browse files

lmb: Add lmb_free() 



We can free memory allocated with lmb_alloc() by removing it from the
list of reserved LMBs. Rework lmb_remove() to allow that possibility
and add lmb_free() which exploits it.

BenH: Removed some useless parenthesis

Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 859aefc5

include/linux/lmb.h

+1 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ extern void __init lmb_init(void); 
extern void __init lmb_analyze(void);

extern long lmb_add(u64 base, u64 size);

extern long lmb_remove(u64 base, u64 size);

extern long __init lmb_free(u64 base, u64 size);

extern long __init lmb_reserve(u64 base, u64 size);

extern u64 __init lmb_alloc_nid(u64 size, u64 align, int nid,

				u64 (*nid_range)(u64, u64, int *));

lib/lmb.c

+11 −2
Original line number Diff line number Diff line
@@ -205,9 +205,8 @@ long lmb_add(u64 base, u64 size) 


}



long lmb_remove(u64 base, u64 size)

static long __lmb_remove(struct lmb_region *rgn, u64 base, u64 size)

{

	struct lmb_region *rgn = &(lmb.memory);

	u64 rgnbegin, rgnend;

	u64 end = base + size;

	int i;
@@ -254,6 +253,16 @@ long lmb_remove(u64 base, u64 size) 
	return lmb_add_region(rgn, end, rgnend - end);

}



long lmb_remove(u64 base, u64 size)

{

	return __lmb_remove(&lmb.memory, base, size);

}



long __init lmb_free(u64 base, u64 size)

{

	return __lmb_remove(&lmb.reserved, base, size);

}



long __init lmb_reserve(u64 base, u64 size)

{

	struct lmb_region *_rgn = &lmb.reserved;