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authorChristoph Hellwig <hch@lst.de>2020-06-01 21:52:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-02 10:59:11 -0700
commit041de93ff86fc500aa73e5360039c95f4d31b95f (patch)
tree6c5aef031ba2ad5ed70f360a329443727cbc03b8
parentc3f896dcf1e47959aca4f8e6ac9537b478949126 (diff)
mm: remove vmalloc_user_node_flags
Open code it in __bpf_map_area_alloc, which is the only caller. Also clean up __bpf_map_area_alloc to have a single vmalloc call with slightly different flags instead of the current two different calls. For this to compile for the nommu case add a __vmalloc_node_range stub to nommu.c. [akpm@linux-foundation.org: fix nommu.c build] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Gao Xiang <xiang@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Kelley <mikelley@microsoft.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Wei Liu <wei.liu@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Link: http://lkml.kernel.org/r/20200414131348.444715-27-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/vmalloc.h1
-rw-r--r--kernel/bpf/syscall.c24
-rw-r--r--mm/nommu.c14
-rw-r--r--mm/vmalloc.c20
4 files changed, 22 insertions, 37 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 964d58a060ca..3332926295d4 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -106,7 +106,6 @@ extern void *vzalloc(unsigned long size);
extern void *vmalloc_user(unsigned long size);
extern void *vmalloc_node(unsigned long size, int node);
extern void *vzalloc_node(unsigned long size, int node);
-extern void *vmalloc_user_node_flags(unsigned long size, int node, gfp_t flags);
extern void *vmalloc_exec(unsigned long size);
extern void *vmalloc_32(unsigned long size);
extern void *vmalloc_32_user(unsigned long size);
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 9c1cf7a87fb3..42c7a42fc9c8 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -25,6 +25,7 @@
#include <linux/nospec.h>
#include <linux/audit.h>
#include <uapi/linux/btf.h>
+#include <asm/pgtable.h>
#include <linux/bpf_lsm.h>
#define IS_FD_ARRAY(map) ((map)->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY || \
@@ -281,26 +282,29 @@ static void *__bpf_map_area_alloc(u64 size, int numa_node, bool mmapable)
* __GFP_RETRY_MAYFAIL to avoid such situations.
*/
- const gfp_t flags = __GFP_NOWARN | __GFP_ZERO;
+ const gfp_t gfp = __GFP_NOWARN | __GFP_ZERO;
+ unsigned int flags = 0;
+ unsigned long align = 1;
void *area;
if (size >= SIZE_MAX)
return NULL;
/* kmalloc()'ed memory can't be mmap()'ed */
- if (!mmapable && size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
- area = kmalloc_node(size, GFP_USER | __GFP_NORETRY | flags,
+ if (mmapable) {
+ BUG_ON(!PAGE_ALIGNED(size));
+ align = SHMLBA;
+ flags = VM_USERMAP;
+ } else if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
+ area = kmalloc_node(size, gfp | GFP_USER | __GFP_NORETRY,
numa_node);
if (area != NULL)
return area;
}
- if (mmapable) {
- BUG_ON(!PAGE_ALIGNED(size));
- return vmalloc_user_node_flags(size, numa_node, GFP_KERNEL |
- __GFP_RETRY_MAYFAIL | flags);
- }
- return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_RETRY_MAYFAIL | flags,
- numa_node, __builtin_return_address(0));
+
+ return __vmalloc_node_range(size, align, VMALLOC_START, VMALLOC_END,
+ gfp | GFP_KERNEL | __GFP_RETRY_MAYFAIL, PAGE_KERNEL,
+ flags, numa_node, __builtin_return_address(0));
}
void *bpf_map_area_alloc(u64 size, int numa_node)
diff --git a/mm/nommu.c b/mm/nommu.c
index 08848fc18672..371697bf372d 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -150,6 +150,14 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask)
}
EXPORT_SYMBOL(__vmalloc);
+void *__vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, unsigned long vm_flags, int node,
+ const void *caller)
+{
+ return __vmalloc(size, gfp_mask);
+}
+
void *__vmalloc_node(unsigned long size, unsigned long align, gfp_t gfp_mask,
int node, const void *caller)
{
@@ -180,12 +188,6 @@ void *vmalloc_user(unsigned long size)
}
EXPORT_SYMBOL(vmalloc_user);
-void *vmalloc_user_node_flags(unsigned long size, int node, gfp_t flags)
-{
- return __vmalloc_user_flags(size, flags | __GFP_ZERO);
-}
-EXPORT_SYMBOL(vmalloc_user_node_flags);
-
struct page *vmalloc_to_page(const void *addr)
{
return virt_to_page(addr);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 931106654d1f..410bfe26ee73 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2660,26 +2660,6 @@ void *vzalloc_node(unsigned long size, int node)
EXPORT_SYMBOL(vzalloc_node);
/**
- * vmalloc_user_node_flags - allocate memory for userspace on a specific node
- * @size: allocation size
- * @node: numa node
- * @flags: flags for the page level allocator
- *
- * The resulting memory area is zeroed so it can be mapped to userspace
- * without leaking data.
- *
- * Return: pointer to the allocated memory or %NULL on error
- */
-void *vmalloc_user_node_flags(unsigned long size, int node, gfp_t flags)
-{
- return __vmalloc_node_range(size, SHMLBA, VMALLOC_START, VMALLOC_END,
- flags | __GFP_ZERO, PAGE_KERNEL,
- VM_USERMAP, node,
- __builtin_return_address(0));
-}
-EXPORT_SYMBOL(vmalloc_user_node_flags);
-
-/**
* vmalloc_exec - allocate virtually contiguous, executable memory
* @size: allocation size
*