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authorBernhard Walle <bwalle@suse.de>2008-02-07 03:15:17 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 11:42:25 -0500
commit72a7fe3967dbf86cb34e24fbf1d957fe24d2f246 (patch)
treec19f7d0b530577359840e959cce204939caf0649 /arch/arm
parent25fad945a7f7ff2cf06e437381c6a1121784dbd9 (diff)
Introduce flags for reserve_bootmem()
This patchset adds a flags variable to reserve_bootmem() and uses the BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions between crashkernel area and already used memory. This patch: Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE. If that flag is set, the function returns with -EBUSY if the memory already has been reserved in the past. This is to avoid conflicts. Because that code runs before SMP initialisation, there's no race condition inside reserve_bootmem_core(). [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix powerpc build] Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: <linux-arch@vger.kernel.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mm/init.c4
-rw-r--r--arch/arm/mm/mmu.c17
-rw-r--r--arch/arm/mm/nommu.c9
-rw-r--r--arch/arm/plat-omap/fb.c2
4 files changed, 20 insertions, 12 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index c0ad7c0fbae0..ec00f26bffa4 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -239,7 +239,7 @@ bootmem_init_node(int node, int initrd_node, struct meminfo *mi)
239 * Reserve the bootmem bitmap for this node. 239 * Reserve the bootmem bitmap for this node.
240 */ 240 */
241 reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT, 241 reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT,
242 boot_pages << PAGE_SHIFT); 242 boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
243 243
244#ifdef CONFIG_BLK_DEV_INITRD 244#ifdef CONFIG_BLK_DEV_INITRD
245 /* 245 /*
@@ -247,7 +247,7 @@ bootmem_init_node(int node, int initrd_node, struct meminfo *mi)
247 */ 247 */
248 if (node == initrd_node) { 248 if (node == initrd_node) {
249 reserve_bootmem_node(pgdat, phys_initrd_start, 249 reserve_bootmem_node(pgdat, phys_initrd_start,
250 phys_initrd_size); 250 phys_initrd_size, BOOTMEM_DEFAULT);
251 initrd_start = __phys_to_virt(phys_initrd_start); 251 initrd_start = __phys_to_virt(phys_initrd_start);
252 initrd_end = initrd_start + phys_initrd_size; 252 initrd_end = initrd_start + phys_initrd_size;
253 } 253 }
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index e5d61ee3d4a1..d41a75ed3dce 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -605,9 +605,11 @@ void __init reserve_node_zero(pg_data_t *pgdat)
605 * Note that this can only be in node 0. 605 * Note that this can only be in node 0.
606 */ 606 */
607#ifdef CONFIG_XIP_KERNEL 607#ifdef CONFIG_XIP_KERNEL
608 reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start); 608 reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start,
609 BOOTMEM_DEFAULT);
609#else 610#else
610 reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext); 611 reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext,
612 BOOTMEM_DEFAULT);
611#endif 613#endif
612 614
613 /* 615 /*
@@ -615,7 +617,7 @@ void __init reserve_node_zero(pg_data_t *pgdat)
615 * and can only be in node 0. 617 * and can only be in node 0.
616 */ 618 */
617 reserve_bootmem_node(pgdat, __pa(swapper_pg_dir), 619 reserve_bootmem_node(pgdat, __pa(swapper_pg_dir),
618 PTRS_PER_PGD * sizeof(pgd_t)); 620 PTRS_PER_PGD * sizeof(pgd_t), BOOTMEM_DEFAULT);
619 621
620 /* 622 /*
621 * Hmm... This should go elsewhere, but we really really need to 623 * Hmm... This should go elsewhere, but we really really need to
@@ -638,8 +640,10 @@ void __init reserve_node_zero(pg_data_t *pgdat)
638 /* H1940 and RX3715 need to reserve this for suspend */ 640 /* H1940 and RX3715 need to reserve this for suspend */
639 641
640 if (machine_is_h1940() || machine_is_rx3715()) { 642 if (machine_is_h1940() || machine_is_rx3715()) {
641 reserve_bootmem_node(pgdat, 0x30003000, 0x1000); 643 reserve_bootmem_node(pgdat, 0x30003000, 0x1000,
642 reserve_bootmem_node(pgdat, 0x30081000, 0x1000); 644 BOOTMEM_DEFAULT);
645 reserve_bootmem_node(pgdat, 0x30081000, 0x1000,
646 BOOTMEM_DEFAULT);
643 } 647 }
644 648
645#ifdef CONFIG_SA1111 649#ifdef CONFIG_SA1111
@@ -650,7 +654,8 @@ void __init reserve_node_zero(pg_data_t *pgdat)
650 res_size = __pa(swapper_pg_dir) - PHYS_OFFSET; 654 res_size = __pa(swapper_pg_dir) - PHYS_OFFSET;
651#endif 655#endif
652 if (res_size) 656 if (res_size)
653 reserve_bootmem_node(pgdat, PHYS_OFFSET, res_size); 657 reserve_bootmem_node(pgdat, PHYS_OFFSET, res_size,
658 BOOTMEM_DEFAULT);
654} 659}
655 660
656/* 661/*
diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index 8cd3a60954f0..63c62fdea521 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -27,9 +27,11 @@ void __init reserve_node_zero(pg_data_t *pgdat)
27 * Note that this can only be in node 0. 27 * Note that this can only be in node 0.
28 */ 28 */
29#ifdef CONFIG_XIP_KERNEL 29#ifdef CONFIG_XIP_KERNEL
30 reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start); 30 reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start,
31 BOOTMEM_DEFAULT);
31#else 32#else
32 reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext); 33 reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext,
34 BOOTMEM_DEFAULT);
33#endif 35#endif
34 36
35 /* 37 /*
@@ -37,7 +39,8 @@ void __init reserve_node_zero(pg_data_t *pgdat)
37 * some architectures which the DRAM is the exception vector to trap, 39 * some architectures which the DRAM is the exception vector to trap,
38 * alloc_page breaks with error, although it is not NULL, but "0." 40 * alloc_page breaks with error, although it is not NULL, but "0."
39 */ 41 */
40 reserve_bootmem_node(pgdat, CONFIG_VECTORS_BASE, PAGE_SIZE); 42 reserve_bootmem_node(pgdat, CONFIG_VECTORS_BASE, PAGE_SIZE,
43 BOOTMEM_DEFAULT);
41} 44}
42 45
43/* 46/*
diff --git a/arch/arm/plat-omap/fb.c b/arch/arm/plat-omap/fb.c
index ee40c1a0b83d..7854f19b77cf 100644
--- a/arch/arm/plat-omap/fb.c
+++ b/arch/arm/plat-omap/fb.c
@@ -207,7 +207,7 @@ void __init omapfb_reserve_sdram(void)
207 return; 207 return;
208 } 208 }
209 if (rg.paddr) 209 if (rg.paddr)
210 reserve_bootmem(rg.paddr, rg.size); 210 reserve_bootmem(rg.paddr, rg.size, BOOTMEM_DEFAULT);
211 reserved += rg.size; 211 reserved += rg.size;
212 omapfb_config.mem_desc.region[i] = rg; 212 omapfb_config.mem_desc.region[i] = rg;
213 configured_regions++; 213 configured_regions++;