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authorMichal Hocko <mhocko@suse.com>2017-05-13 01:46:41 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-13 01:57:15 +0300
commit8594a21cf7a8318baedbedc3fcd2967a17ddeec0 (patch)
tree05e5666d26e2b5f845797535a144e43d9721efcb /include
parent835152a25949dd5561819c2e3fcc4b2dd27f3e1e (diff)
downloadlinux-8594a21cf7a8318baedbedc3fcd2967a17ddeec0.tar.xz
mm, vmalloc: fix vmalloc users tracking properly
Commit 1f5307b1e094 ("mm, vmalloc: properly track vmalloc users") has pulled asm/pgtable.h include dependency to linux/vmalloc.h and that turned out to be a bad idea for some architectures. E.g. m68k fails with In file included from arch/m68k/include/asm/pgtable_mm.h:145:0, from arch/m68k/include/asm/pgtable.h:4, from include/linux/vmalloc.h:9, from arch/m68k/kernel/module.c:9: arch/m68k/include/asm/mcf_pgtable.h: In function 'nocache_page': >> arch/m68k/include/asm/mcf_pgtable.h:339:43: error: 'init_mm' undeclared (first use in this function) #define pgd_offset_k(address) pgd_offset(&init_mm, address) as spotted by kernel build bot. nios2 fails for other reason In file included from include/asm-generic/io.h:767:0, from arch/nios2/include/asm/io.h:61, from include/linux/io.h:25, from arch/nios2/include/asm/pgtable.h:18, from include/linux/mm.h:70, from include/linux/pid_namespace.h:6, from include/linux/ptrace.h:9, from arch/nios2/include/uapi/asm/elf.h:23, from arch/nios2/include/asm/elf.h:22, from include/linux/elf.h:4, from include/linux/module.h:15, from init/main.c:16: include/linux/vmalloc.h: In function '__vmalloc_node_flags': include/linux/vmalloc.h:99:40: error: 'PAGE_KERNEL' undeclared (first use in this function); did you mean 'GFP_KERNEL'? which is due to the newly added #include <asm/pgtable.h>, which on nios2 includes <linux/io.h> and thus <asm/io.h> and <asm-generic/io.h> which again includes <linux/vmalloc.h>. Tweaking that around just turns out a bigger headache than necessary. This patch reverts 1f5307b1e094 and reimplements the original fix in a different way. __vmalloc_node_flags can stay static inline which will cover vmalloc* functions. We only have one external user (kvmalloc_node) and we can export __vmalloc_node_flags_caller and provide the caller directly. This is much simpler and it doesn't really need any games with header files. [akpm@linux-foundation.org: coding-style fixes] [mhocko@kernel.org: revert old comment] Link: http://lkml.kernel.org/r/20170509211054.GB16325@dhcp22.suse.cz Fixes: 1f5307b1e094 ("mm, vmalloc: properly track vmalloc users") Link: http://lkml.kernel.org/r/20170509153702.GR6481@dhcp22.suse.cz Signed-off-by: Michal Hocko <mhocko@suse.com> Cc: Tobias Klauser <tklauser@distanz.ch> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/vmalloc.h21
1 files changed, 6 insertions, 15 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 0328ce003992..2d92dd002abd 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -6,7 +6,6 @@
#include <linux/list.h>
#include <linux/llist.h>
#include <asm/page.h> /* pgprot_t */
-#include <asm/pgtable.h> /* PAGE_KERNEL */
#include <linux/rbtree.h>
struct vm_area_struct; /* vma defining user mapping in mm_types.h */
@@ -83,22 +82,14 @@ extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
const void *caller);
#ifndef CONFIG_MMU
extern void *__vmalloc_node_flags(unsigned long size, int node, gfp_t flags);
-#else
-extern void *__vmalloc_node(unsigned long size, unsigned long align,
- gfp_t gfp_mask, pgprot_t prot,
- int node, const void *caller);
-
-/*
- * We really want to have this inlined due to caller tracking. This
- * function is used by the highlevel vmalloc apis and so we want to track
- * their callers and inlining will achieve that.
- */
-static inline void *__vmalloc_node_flags(unsigned long size,
- int node, gfp_t flags)
+static inline void *__vmalloc_node_flags_caller(unsigned long size, int node,
+ gfp_t flags, void *caller)
{
- return __vmalloc_node(size, 1, flags, PAGE_KERNEL,
- node, __builtin_return_address(0));
+ return __vmalloc_node_flags(size, node, flags);
}
+#else
+extern void *__vmalloc_node_flags_caller(unsigned long size,
+ int node, gfp_t flags, void *caller);
#endif
extern void vfree(const void *addr);