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Add MADV_POPULATE_READ definition from linux v5.14

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  linux commit 4ca9b3859dac14bbef0c27d00667bb5b10917adb
  mm/madvise: introduce MADV_POPULATE_(READ|WRITE) to prefault page tables
This commit is contained in:
Michal Biesek 2023-08-11 23:29:33 +02:00
parent 0a539adc50
commit c4ac6dbc35
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3 changed files with 4 additions and 0 deletions
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1
libc/sysv/consts.sh
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@ -269,6 +269,7 @@ syscon madv MADV_WIPEONFORK 18 18 127 127 127 127 127 127 # T
syscon madv MADV_KEEPONFORK 19 19 127 127 127 127 127 127 # TODO: add support ?
syscon madv MADV_COLD 20 20 127 127 127 127 127 127 # TODO: add support ?
syscon madv MADV_PAGEOUT 21 21 127 127 127 127 127 127 # TODO: add support ?
syscon madv MADV_POPULATE_READ 22 22 127 127 127 127 127 127 # TODO: add support ?
syscon madv MADV_DOFORK 11 11 127 127 127 127 127 127 # TODO(jart): what is it?
syscon madv MADV_DONTDUMP 16 16 127 127 127 127 127 127 # see MAP_CONCEAL in OpenBSD; TODO(jart): what is it?
syscon madv MADV_DONTFORK 10 10 127 127 127 127 127 127 # TODO(jart): what is it?

2
libc/sysv/consts/MADV_POPULATE_READ.S Normal file
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@ -0,0 +1,2 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon madv,MADV_POPULATE_READ,22,22,127,127,127,127,127,127

1
libc/sysv/consts/madv.h
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@ -24,6 +24,7 @@ extern const unsigned MADV_WIPEONFORK;
extern const unsigned MADV_KEEPONFORK;
extern const unsigned MADV_COLD;
extern const unsigned MADV_PAGEOUT;
extern const unsigned MADV_POPULATE_READ;
#define MADV_NORMAL 0
#define MADV_RANDOM 1