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Date:   Thu, 6 Sep 2018 16:14:34 +0300
From:   Mike Rapoport <rppt@linux.vnet.ibm.com>
To:     Michal Hocko <mhocko@kernel.org>
Cc:     linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
        "David S. Miller" <davem@davemloft.net>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Ingo Molnar <mingo@redhat.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Paul Burton <paul.burton@mips.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Tony Luck <tony.luck@intel.com>, linux-ia64@vger.kernel.org,
        linux-mips@linux-mips.org, linuxppc-dev@lists.ozlabs.org,
        sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 21/29] memblock: replace alloc_bootmem with
 memblock_alloc
References: <1536163184-26356-1-git-send-email-rppt@linux.vnet.ibm.com>
 <1536163184-26356-22-git-send-email-rppt@linux.vnet.ibm.com>
 <20180906085515.GF14951@dhcp22.suse.cz>
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On Thu, Sep 06, 2018 at 10:55:15AM +0200, Michal Hocko wrote:
> On Wed 05-09-18 18:59:36, Mike Rapoport wrote:
> > The conversion is done using the following semantic patch:
> > 
> > @@
> > expression e;
> > @@
> > - __alloc_bootmem(e)
> 
> Did you mean alloc_bottmem? Anyway the only difference from
> _alloc_bootmem is SMP_CACHE_BYTES and so you can use 0 alignment for
> memblock_virt_alloc. Why do we need memblock_alloc_from at all?

Here again, I've copied the wrong script to the changelog. Will fix.
Should have been

- alloc_bootmem(size)
+ memblock_alloc(size, 0)
 
> > + memblock_alloc_from(e, 0)
> > 
> > Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
> > ---
> >  arch/alpha/kernel/core_marvel.c     | 4 ++--
> >  arch/alpha/kernel/pci-noop.c        | 4 ++--
> >  arch/alpha/kernel/pci.c             | 4 ++--
> >  arch/alpha/kernel/pci_iommu.c       | 4 ++--
> >  arch/ia64/kernel/mca.c              | 4 ++--
> >  arch/ia64/mm/tlb.c                  | 4 ++--
> >  arch/m68k/sun3/sun3dvma.c           | 3 ++-
> >  arch/microblaze/mm/init.c           | 2 +-
> >  arch/mips/kernel/setup.c            | 2 +-
> >  arch/um/drivers/net_kern.c          | 2 +-
> >  arch/um/drivers/vector_kern.c       | 2 +-
> >  arch/um/kernel/initrd.c             | 2 +-
> >  arch/x86/kernel/acpi/boot.c         | 3 ++-
> >  arch/x86/kernel/apic/io_apic.c      | 2 +-
> >  arch/x86/kernel/e820.c              | 2 +-
> >  arch/x86/platform/olpc/olpc_dt.c    | 2 +-
> >  arch/xtensa/platforms/iss/network.c | 2 +-
> >  arch/xtensa/platforms/iss/setup.c   | 4 ++--
> >  drivers/macintosh/smu.c             | 2 +-
> >  init/main.c                         | 4 ++--
> >  20 files changed, 30 insertions(+), 28 deletions(-)
> > 
> > diff --git a/arch/alpha/kernel/core_marvel.c b/arch/alpha/kernel/core_marvel.c
> > index bdebb8c2..1f00c94 100644
> > --- a/arch/alpha/kernel/core_marvel.c
> > +++ b/arch/alpha/kernel/core_marvel.c
> > @@ -82,7 +82,7 @@ mk_resource_name(int pe, int port, char *str)
> >  	char *name;
> >  	
> >  	sprintf(tmp, "PCI %s PE %d PORT %d", str, pe, port);
> > -	name = alloc_bootmem(strlen(tmp) + 1);
> > +	name = memblock_alloc(strlen(tmp) + 1, 0);
> >  	strcpy(name, tmp);
> >  
> >  	return name;
> > @@ -117,7 +117,7 @@ alloc_io7(unsigned int pe)
> >  		return NULL;
> >  	}
> >  
> > -	io7 = alloc_bootmem(sizeof(*io7));
> > +	io7 = memblock_alloc(sizeof(*io7), 0);
> >  	io7->pe = pe;
> >  	raw_spin_lock_init(&io7->irq_lock);
> >  
> > diff --git a/arch/alpha/kernel/pci-noop.c b/arch/alpha/kernel/pci-noop.c
> > index c7c5879..59cbfc2 100644
> > --- a/arch/alpha/kernel/pci-noop.c
> > +++ b/arch/alpha/kernel/pci-noop.c
> > @@ -33,7 +33,7 @@ alloc_pci_controller(void)
> >  {
> >  	struct pci_controller *hose;
> >  
> > -	hose = alloc_bootmem(sizeof(*hose));
> > +	hose = memblock_alloc(sizeof(*hose), 0);
> >  
> >  	*hose_tail = hose;
> >  	hose_tail = &hose->next;
> > @@ -44,7 +44,7 @@ alloc_pci_controller(void)
> >  struct resource * __init
> >  alloc_resource(void)
> >  {
> > -	return alloc_bootmem(sizeof(struct resource));
> > +	return memblock_alloc(sizeof(struct resource), 0);
> >  }
> >  
> >  SYSCALL_DEFINE3(pciconfig_iobase, long, which, unsigned long, bus,
> > diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
> > index c668c3b..4cc3eb9 100644
> > --- a/arch/alpha/kernel/pci.c
> > +++ b/arch/alpha/kernel/pci.c
> > @@ -392,7 +392,7 @@ alloc_pci_controller(void)
> >  {
> >  	struct pci_controller *hose;
> >  
> > -	hose = alloc_bootmem(sizeof(*hose));
> > +	hose = memblock_alloc(sizeof(*hose), 0);
> >  
> >  	*hose_tail = hose;
> >  	hose_tail = &hose->next;
> > @@ -403,7 +403,7 @@ alloc_pci_controller(void)
> >  struct resource * __init
> >  alloc_resource(void)
> >  {
> > -	return alloc_bootmem(sizeof(struct resource));
> > +	return memblock_alloc(sizeof(struct resource), 0);
> >  }
> >  
> >  
> > diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
> > index 0c05493..5d178c7 100644
> > --- a/arch/alpha/kernel/pci_iommu.c
> > +++ b/arch/alpha/kernel/pci_iommu.c
> > @@ -79,7 +79,7 @@ iommu_arena_new_node(int nid, struct pci_controller *hose, dma_addr_t base,
> >  		printk("%s: couldn't allocate arena from node %d\n"
> >  		       "    falling back to system-wide allocation\n",
> >  		       __func__, nid);
> > -		arena = alloc_bootmem(sizeof(*arena));
> > +		arena = memblock_alloc(sizeof(*arena), 0);
> >  	}
> >  
> >  	arena->ptes = memblock_alloc_node(sizeof(*arena), align, nid);
> > @@ -92,7 +92,7 @@ iommu_arena_new_node(int nid, struct pci_controller *hose, dma_addr_t base,
> >  
> >  #else /* CONFIG_DISCONTIGMEM */
> >  
> > -	arena = alloc_bootmem(sizeof(*arena));
> > +	arena = memblock_alloc(sizeof(*arena), 0);
> >  	arena->ptes = memblock_alloc_from(mem_size, align, 0);
> >  
> >  #endif /* CONFIG_DISCONTIGMEM */
> > diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
> > index 5586926..7120976 100644
> > --- a/arch/ia64/kernel/mca.c
> > +++ b/arch/ia64/kernel/mca.c
> > @@ -361,9 +361,9 @@ static ia64_state_log_t ia64_state_log[IA64_MAX_LOG_TYPES];
> >  
> >  #define IA64_LOG_ALLOCATE(it, size) \
> >  	{ia64_state_log[it].isl_log[IA64_LOG_CURR_INDEX(it)] = \
> > -		(ia64_err_rec_t *)alloc_bootmem(size); \
> > +		(ia64_err_rec_t *)memblock_alloc(size, 0); \
> >  	ia64_state_log[it].isl_log[IA64_LOG_NEXT_INDEX(it)] = \
> > -		(ia64_err_rec_t *)alloc_bootmem(size);}
> > +		(ia64_err_rec_t *)memblock_alloc(size, 0);}
> >  #define IA64_LOG_LOCK_INIT(it) spin_lock_init(&ia64_state_log[it].isl_lock)
> >  #define IA64_LOG_LOCK(it)      spin_lock_irqsave(&ia64_state_log[it].isl_lock, s)
> >  #define IA64_LOG_UNLOCK(it)    spin_unlock_irqrestore(&ia64_state_log[it].isl_lock,s)
> > diff --git a/arch/ia64/mm/tlb.c b/arch/ia64/mm/tlb.c
> > index acf10eb..5554863 100644
> > --- a/arch/ia64/mm/tlb.c
> > +++ b/arch/ia64/mm/tlb.c
> > @@ -59,8 +59,8 @@ struct ia64_tr_entry *ia64_idtrs[NR_CPUS];
> >  void __init
> >  mmu_context_init (void)
> >  {
> > -	ia64_ctx.bitmap = alloc_bootmem((ia64_ctx.max_ctx+1)>>3);
> > -	ia64_ctx.flushmap = alloc_bootmem((ia64_ctx.max_ctx+1)>>3);
> > +	ia64_ctx.bitmap = memblock_alloc((ia64_ctx.max_ctx + 1) >> 3, 0);
> > +	ia64_ctx.flushmap = memblock_alloc((ia64_ctx.max_ctx + 1) >> 3, 0);
> >  }
> >  
> >  /*
> > diff --git a/arch/m68k/sun3/sun3dvma.c b/arch/m68k/sun3/sun3dvma.c
> > index 8546922..72d9458 100644
> > --- a/arch/m68k/sun3/sun3dvma.c
> > +++ b/arch/m68k/sun3/sun3dvma.c
> > @@ -267,7 +267,8 @@ void __init dvma_init(void)
> >  
> >  	list_add(&(hole->list), &hole_list);
> >  
> > -	iommu_use = alloc_bootmem(IOMMU_TOTAL_ENTRIES * sizeof(unsigned long));
> > +	iommu_use = memblock_alloc(IOMMU_TOTAL_ENTRIES * sizeof(unsigned long),
> > +				   0);
> >  
> >  	dvma_unmap_iommu(DVMA_START, DVMA_SIZE);
> >  
> > diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
> > index df6de7c..8c7f074 100644
> > --- a/arch/microblaze/mm/init.c
> > +++ b/arch/microblaze/mm/init.c
> > @@ -377,7 +377,7 @@ void * __ref zalloc_maybe_bootmem(size_t size, gfp_t mask)
> >  	if (mem_init_done)
> >  		p = kzalloc(size, mask);
> >  	else {
> > -		p = alloc_bootmem(size);
> > +		p = memblock_alloc(size, 0);
> >  		if (p)
> >  			memset(p, 0, size);
> >  	}
> > diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
> > index 08f8251..419dfc42 100644
> > --- a/arch/mips/kernel/setup.c
> > +++ b/arch/mips/kernel/setup.c
> > @@ -901,7 +901,7 @@ static void __init resource_init(void)
> >  		if (end >= HIGHMEM_START)
> >  			end = HIGHMEM_START - 1;
> >  
> > -		res = alloc_bootmem(sizeof(struct resource));
> > +		res = memblock_alloc(sizeof(struct resource), 0);
> >  
> >  		res->start = start;
> >  		res->end = end;
> > diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
> > index 3ef1b48..ef19a39 100644
> > --- a/arch/um/drivers/net_kern.c
> > +++ b/arch/um/drivers/net_kern.c
> > @@ -650,7 +650,7 @@ static int __init eth_setup(char *str)
> >  		return 1;
> >  	}
> >  
> > -	new = alloc_bootmem(sizeof(*new));
> > +	new = memblock_alloc(sizeof(*new), 0);
> >  
> >  	INIT_LIST_HEAD(&new->list);
> >  	new->index = n;
> > diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c
> > index c84133c..9d77579 100644
> > --- a/arch/um/drivers/vector_kern.c
> > +++ b/arch/um/drivers/vector_kern.c
> > @@ -1575,7 +1575,7 @@ static int __init vector_setup(char *str)
> >  				 str, error);
> >  		return 1;
> >  	}
> > -	new = alloc_bootmem(sizeof(*new));
> > +	new = memblock_alloc(sizeof(*new), 0);
> >  	INIT_LIST_HEAD(&new->list);
> >  	new->unit = n;
> >  	new->arguments = str;
> > diff --git a/arch/um/kernel/initrd.c b/arch/um/kernel/initrd.c
> > index 6f6e789..844056c 100644
> > --- a/arch/um/kernel/initrd.c
> > +++ b/arch/um/kernel/initrd.c
> > @@ -36,7 +36,7 @@ int __init read_initrd(void)
> >  		return 0;
> >  	}
> >  
> > -	area = alloc_bootmem(size);
> > +	area = memblock_alloc(size, 0);
> >  
> >  	if (load_initrd(initrd, area, size) == -1)
> >  		return 0;
> > diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
> > index 3b20607..fd887c1 100644
> > --- a/arch/x86/kernel/acpi/boot.c
> > +++ b/arch/x86/kernel/acpi/boot.c
> > @@ -932,7 +932,8 @@ static int __init acpi_parse_hpet(struct acpi_table_header *table)
> >  	 * the resource tree during the lateinit timeframe.
> >  	 */
> >  #define HPET_RESOURCE_NAME_SIZE 9
> > -	hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
> > +	hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
> > +				  0);
> >  
> >  	hpet_res->name = (void *)&hpet_res[1];
> >  	hpet_res->flags = IORESOURCE_MEM;
> > diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
> > index e25118f..8c74509 100644
> > --- a/arch/x86/kernel/apic/io_apic.c
> > +++ b/arch/x86/kernel/apic/io_apic.c
> > @@ -2578,7 +2578,7 @@ static struct resource * __init ioapic_setup_resources(void)
> >  	n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource);
> >  	n *= nr_ioapics;
> >  
> > -	mem = alloc_bootmem(n);
> > +	mem = memblock_alloc(n, 0);
> >  	res = (void *)mem;
> >  
> >  	mem += sizeof(struct resource) * nr_ioapics;
> > diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
> > index c88c23c..7ea8748 100644
> > --- a/arch/x86/kernel/e820.c
> > +++ b/arch/x86/kernel/e820.c
> > @@ -1094,7 +1094,7 @@ void __init e820__reserve_resources(void)
> >  	struct resource *res;
> >  	u64 end;
> >  
> > -	res = alloc_bootmem(sizeof(*res) * e820_table->nr_entries);
> > +	res = memblock_alloc(sizeof(*res) * e820_table->nr_entries, 0);
> >  	e820_res = res;
> >  
> >  	for (i = 0; i < e820_table->nr_entries; i++) {
> > diff --git a/arch/x86/platform/olpc/olpc_dt.c b/arch/x86/platform/olpc/olpc_dt.c
> > index d6ee929..140cd76 100644
> > --- a/arch/x86/platform/olpc/olpc_dt.c
> > +++ b/arch/x86/platform/olpc/olpc_dt.c
> > @@ -141,7 +141,7 @@ void * __init prom_early_alloc(unsigned long size)
> >  		 * fast enough on the platforms we care about while minimizing
> >  		 * wasted bootmem) and hand off chunks of it to callers.
> >  		 */
> > -		res = alloc_bootmem(chunk_size);
> > +		res = memblock_alloc(chunk_size, 0);
> >  		BUG_ON(!res);
> >  		prom_early_allocated += chunk_size;
> >  		memset(res, 0, chunk_size);
> > diff --git a/arch/xtensa/platforms/iss/network.c b/arch/xtensa/platforms/iss/network.c
> > index d027ddd..206b9d4 100644
> > --- a/arch/xtensa/platforms/iss/network.c
> > +++ b/arch/xtensa/platforms/iss/network.c
> > @@ -646,7 +646,7 @@ static int __init iss_net_setup(char *str)
> >  		return 1;
> >  	}
> >  
> > -	new = alloc_bootmem(sizeof(*new));
> > +	new = memblock_alloc(sizeof(*new), 0);
> >  	if (new == NULL) {
> >  		pr_err("Alloc_bootmem failed\n");
> >  		return 1;
> > diff --git a/arch/xtensa/platforms/iss/setup.c b/arch/xtensa/platforms/iss/setup.c
> > index f4bbb28..a922511 100644
> > --- a/arch/xtensa/platforms/iss/setup.c
> > +++ b/arch/xtensa/platforms/iss/setup.c
> > @@ -82,8 +82,8 @@ void __init platform_setup(char **p_cmdline)
> >  	int argv_size = simc_argv_size();
> >  
> >  	if (argc > 1) {
> > -		void **argv = alloc_bootmem(argv_size);
> > -		char *cmdline = alloc_bootmem(argv_size);
> > +		void **argv = memblock_alloc(argv_size, 0);
> > +		char *cmdline = memblock_alloc(argv_size, 0);
> >  		int i;
> >  
> >  		cmdline[0] = 0;
> > diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c
> > index e8ae2e5..332fcca 100644
> > --- a/drivers/macintosh/smu.c
> > +++ b/drivers/macintosh/smu.c
> > @@ -493,7 +493,7 @@ int __init smu_init (void)
> >  		goto fail_np;
> >  	}
> >  
> > -	smu = alloc_bootmem(sizeof(struct smu_device));
> > +	smu = memblock_alloc(sizeof(struct smu_device), 0);
> >  
> >  	spin_lock_init(&smu->lock);
> >  	INIT_LIST_HEAD(&smu->cmd_list);
> > diff --git a/init/main.c b/init/main.c
> > index d0b92bd..99a9e99 100644
> > --- a/init/main.c
> > +++ b/init/main.c
> > @@ -768,8 +768,8 @@ static int __init initcall_blacklist(char *str)
> >  		str_entry = strsep(&str, ",");
> >  		if (str_entry) {
> >  			pr_debug("blacklisting initcall %s\n", str_entry);
> > -			entry = alloc_bootmem(sizeof(*entry));
> > -			entry->buf = alloc_bootmem(strlen(str_entry) + 1);
> > +			entry = memblock_alloc(sizeof(*entry), 0);
> > +			entry->buf = memblock_alloc(strlen(str_entry) + 1, 0);
> >  			strcpy(entry->buf, str_entry);
> >  			list_add(&entry->next, &blacklisted_initcalls);
> >  		}
> > -- 
> > 2.7.4
> > 
> 
> -- 
> Michal Hocko
> SUSE Labs
> 

-- 
Sincerely yours,
Mike.