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kasan, mm: only define ___GFP_SKIP_KASAN_POISON with HW_TAGS

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Only define the ___GFP_SKIP_KASAN_POISON flag when CONFIG_KASAN_HW_TAGS is
enabled.

This patch it not useful by itself, but it prepares the code for additions
of new KASAN-specific GFP patches.

Link: https://lkml.kernel.org/r/44e5738a584c11801b2b8f1231898918efc8634a.1643047180.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrey Konovalov 2022-03-24 18:11:23 -07:00 committed by Linus Torvalds
parent 19f1c3acf8
commit f49d9c5bb1
2 changed files with 16 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
include/linux/gfp.h
View file

@ -54,7 +54,11 @@ struct vm_area_struct;
#define ___GFP_THISNODE 0x200000u
#define ___GFP_ACCOUNT 0x400000u
#define ___GFP_ZEROTAGS 0x800000u
#ifdef CONFIG_KASAN_HW_TAGS
#define ___GFP_SKIP_KASAN_POISON 0x1000000u
#else
#define ___GFP_SKIP_KASAN_POISON 0
#endif
#ifdef CONFIG_LOCKDEP
#define ___GFP_NOLOCKDEP 0x2000000u
#else
@ -251,7 +255,9 @@ struct vm_area_struct;
#define __GFP_NOLOCKDEP ((__force gfp_t)___GFP_NOLOCKDEP)
/* Room for N __GFP_FOO bits */
#define __GFP_BITS_SHIFT (25 + IS_ENABLED(CONFIG_LOCKDEP))
#define __GFP_BITS_SHIFT (24 + \
IS_ENABLED(CONFIG_KASAN_HW_TAGS) + \
IS_ENABLED(CONFIG_LOCKDEP))
#define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
/**

12
include/trace/events/mmflags.h
View file

@ -49,12 +49,18 @@
{(unsigned long)__GFP_RECLAIM, "__GFP_RECLAIM"}, \
{(unsigned long)__GFP_DIRECT_RECLAIM, "__GFP_DIRECT_RECLAIM"},\
{(unsigned long)__GFP_KSWAPD_RECLAIM, "__GFP_KSWAPD_RECLAIM"},\
{(unsigned long)__GFP_ZEROTAGS, "__GFP_ZEROTAGS"}, \
{(unsigned long)__GFP_SKIP_KASAN_POISON,"__GFP_SKIP_KASAN_POISON"}\
{(unsigned long)__GFP_ZEROTAGS, "__GFP_ZEROTAGS"} \
#ifdef CONFIG_KASAN_HW_TAGS
#define __def_gfpflag_names_kasan \
, {(unsigned long)__GFP_SKIP_KASAN_POISON, "__GFP_SKIP_KASAN_POISON"}
#else
#define __def_gfpflag_names_kasan
#endif
#define show_gfp_flags(flags) \
(flags) ? __print_flags(flags, "|", \
__def_gfpflag_names \
__def_gfpflag_names __def_gfpflag_names_kasan \
) : "none"
#ifdef CONFIG_MMU