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[Xen-devel] [PATCH 07/21] memblock: memblock_phys_alloc(): don't panic



Make the memblock_phys_alloc() function an inline wrapper for
memblock_phys_alloc_range() and update the memblock_phys_alloc() callers to
check the returned value and panic in case of error.

Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
---
 arch/arm/mm/init.c                   | 4 ++++
 arch/arm64/mm/mmu.c                  | 2 ++
 arch/powerpc/sysdev/dart_iommu.c     | 3 +++
 arch/s390/kernel/crash_dump.c        | 3 +++
 arch/s390/kernel/setup.c             | 3 +++
 arch/sh/boards/mach-ap325rxa/setup.c | 3 +++
 arch/sh/boards/mach-ecovec24/setup.c | 6 ++++++
 arch/sh/boards/mach-kfr2r09/setup.c  | 3 +++
 arch/sh/boards/mach-migor/setup.c    | 3 +++
 arch/sh/boards/mach-se/7724/setup.c  | 6 ++++++
 arch/xtensa/mm/kasan_init.c          | 3 +++
 include/linux/memblock.h             | 7 ++++++-
 mm/memblock.c                        | 5 -----
 13 files changed, 45 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index b76b90e..15dddfe 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -206,6 +206,10 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, 
phys_addr_t align)
        BUG_ON(!arm_memblock_steal_permitted);
 
        phys = memblock_phys_alloc(size, align);
+       if (!phys)
+               panic("Failed to steal %pa bytes at %pS\n",
+                     &size, (void *)_RET_IP_);
+
        memblock_free(phys, size);
        memblock_remove(phys, size);
 
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index b6f5aa5..a74e4be 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -104,6 +104,8 @@ static phys_addr_t __init early_pgtable_alloc(void)
        void *ptr;
 
        phys = memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE);
+       if (!phys)
+               panic("Failed to allocate page table page\n");
 
        /*
         * The FIX_{PGD,PUD,PMD} slots may be in active use, but the FIX_PTE
diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c
index 25bc25f..b82c9ff 100644
--- a/arch/powerpc/sysdev/dart_iommu.c
+++ b/arch/powerpc/sysdev/dart_iommu.c
@@ -265,6 +265,9 @@ static void allocate_dart(void)
         * prefetching into invalid pages and corrupting data
         */
        tmp = memblock_phys_alloc(DART_PAGE_SIZE, DART_PAGE_SIZE);
+       if (!tmp)
+               panic("DART: table allocation failed\n");
+
        dart_emptyval = DARTMAP_VALID | ((tmp >> DART_PAGE_SHIFT) &
                                         DARTMAP_RPNMASK);
 
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index 97eae38..f96a585 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -61,6 +61,9 @@ struct save_area * __init save_area_alloc(bool is_boot_cpu)
        struct save_area *sa;
 
        sa = (void *) memblock_phys_alloc(sizeof(*sa), 8);
+       if (!sa)
+               panic("Failed to allocate save area\n");
+
        if (is_boot_cpu)
                list_add(&sa->list, &dump_save_areas);
        else
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 72dd23e..da48397 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -968,6 +968,9 @@ static void __init setup_randomness(void)
 
        vmms = (struct sysinfo_3_2_2 *) memblock_phys_alloc(PAGE_SIZE,
                                                            PAGE_SIZE);
+       if (!vmms)
+               panic("Failed to allocate memory for sysinfo structure\n");
+
        if (stsi(vmms, 3, 2, 2) == 0 && vmms->count)
                add_device_randomness(&vmms->vm, sizeof(vmms->vm[0]) * 
vmms->count);
        memblock_free((unsigned long) vmms, PAGE_SIZE);
diff --git a/arch/sh/boards/mach-ap325rxa/setup.c 
b/arch/sh/boards/mach-ap325rxa/setup.c
index d7ceab6..08a0cc9 100644
--- a/arch/sh/boards/mach-ap325rxa/setup.c
+++ b/arch/sh/boards/mach-ap325rxa/setup.c
@@ -558,6 +558,9 @@ static void __init ap325rxa_mv_mem_reserve(void)
        phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
        phys = memblock_phys_alloc(size, PAGE_SIZE);
+       if (!phys)
+               panic("Failed to allocate CEU memory\n");
+
        memblock_free(phys, size);
        memblock_remove(phys, size);
 
diff --git a/arch/sh/boards/mach-ecovec24/setup.c 
b/arch/sh/boards/mach-ecovec24/setup.c
index a3901806..fd264a6 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -1481,11 +1481,17 @@ static void __init ecovec_mv_mem_reserve(void)
        phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
        phys = memblock_phys_alloc(size, PAGE_SIZE);
+       if (!phys)
+               panic("Failed to allocate CEU0 memory\n");
+
        memblock_free(phys, size);
        memblock_remove(phys, size);
        ceu0_dma_membase = phys;
 
        phys = memblock_phys_alloc(size, PAGE_SIZE);
+       if (!phys)
+               panic("Failed to allocate CEU1 memory\n");
+
        memblock_free(phys, size);
        memblock_remove(phys, size);
        ceu1_dma_membase = phys;
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c 
b/arch/sh/boards/mach-kfr2r09/setup.c
index 55bdf4a..ebe90d06 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -632,6 +632,9 @@ static void __init kfr2r09_mv_mem_reserve(void)
        phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
        phys = memblock_phys_alloc(size, PAGE_SIZE);
+       if (!phys)
+               panic("Failed to allocate CEU memory\n");
+
        memblock_free(phys, size);
        memblock_remove(phys, size);
 
diff --git a/arch/sh/boards/mach-migor/setup.c 
b/arch/sh/boards/mach-migor/setup.c
index ba7eee6..1adff09 100644
--- a/arch/sh/boards/mach-migor/setup.c
+++ b/arch/sh/boards/mach-migor/setup.c
@@ -631,6 +631,9 @@ static void __init migor_mv_mem_reserve(void)
        phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
        phys = memblock_phys_alloc(size, PAGE_SIZE);
+       if (!phys)
+               panic("Failed to allocate CEU memory\n");
+
        memblock_free(phys, size);
        memblock_remove(phys, size);
 
diff --git a/arch/sh/boards/mach-se/7724/setup.c 
b/arch/sh/boards/mach-se/7724/setup.c
index 4696e10..201631a 100644
--- a/arch/sh/boards/mach-se/7724/setup.c
+++ b/arch/sh/boards/mach-se/7724/setup.c
@@ -966,11 +966,17 @@ static void __init ms7724se_mv_mem_reserve(void)
        phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
        phys = memblock_phys_alloc(size, PAGE_SIZE);
+       if (!phys)
+               panic("Failed to allocate CEU0 memory\n");
+
        memblock_free(phys, size);
        memblock_remove(phys, size);
        ceu0_dma_membase = phys;
 
        phys = memblock_phys_alloc(size, PAGE_SIZE);
+       if (!phys)
+               panic("Failed to allocate CEU1 memory\n");
+
        memblock_free(phys, size);
        memblock_remove(phys, size);
        ceu1_dma_membase = phys;
diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c
index 48dbb03..4852848 100644
--- a/arch/xtensa/mm/kasan_init.c
+++ b/arch/xtensa/mm/kasan_init.c
@@ -54,6 +54,9 @@ static void __init populate(void *start, void *end)
                        phys_addr_t phys =
                                memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE);
 
+                       if (!phys)
+                               panic("Failed to allocate page table page\n");
+
                        set_pte(pte + j, pfn_pte(PHYS_PFN(phys), PAGE_KERNEL));
                }
        }
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 66dfdb3..7883c74 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -374,7 +374,12 @@ phys_addr_t memblock_phys_alloc_range(phys_addr_t size, 
phys_addr_t align,
 phys_addr_t memblock_phys_alloc_nid(phys_addr_t size, phys_addr_t align, int 
nid);
 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, 
int nid);
 
-phys_addr_t memblock_phys_alloc(phys_addr_t size, phys_addr_t align);
+static inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
+                                             phys_addr_t align)
+{
+       return memblock_phys_alloc_range(size, align, 0,
+                                        MEMBLOCK_ALLOC_ACCESSIBLE);
+}
 
 void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
                                 phys_addr_t min_addr, phys_addr_t max_addr,
diff --git a/mm/memblock.c b/mm/memblock.c
index 8aabb1b..461e40a3 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1382,11 +1382,6 @@ phys_addr_t __init memblock_alloc_base(phys_addr_t size, 
phys_addr_t align, phys
        return alloc;
 }
 
-phys_addr_t __init memblock_phys_alloc(phys_addr_t size, phys_addr_t align)
-{
-       return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
-}
-
 phys_addr_t __init memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t 
align, int nid)
 {
        phys_addr_t res = memblock_phys_alloc_nid(size, align, nid);
-- 
2.7.4


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