[PATCH v4 02/18] a.out: remove define-only CMAGIC, previously magic number

[наб <nabijaczleweli@nabijaczleweli.xyz>]

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The last user was removed in 5.1 in
commit 08300f4402ab ("a.out: remove core dumping support")
but this is part of the UAPI headers, so this may want to either wait
until a.out is removed entirely, or be removed from the magic number doc
and silently remain in the header

A cursory glance on DCS didn't show any user code actually using this
value

Found with
grep MAGIC Documentation/process/magic-number.rst | while read -r mag _;
do git grep -wF "$mag"  | grep -ve '^Documentation.*magic-number.rst:' \
-qe ':#define '"$mag" || git grep -wF "$mag" | while IFS=: read -r f _;
do sed -i '/\b'"$mag"'\b/d' "$f"; done ; done

Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
---
 Documentation/process/magic-number.rst                    | 1 -
 Documentation/translations/it_IT/process/magic-number.rst | 1 -
 Documentation/translations/zh_CN/process/magic-number.rst | 1 -
 Documentation/translations/zh_TW/process/magic-number.rst | 1 -
 include/uapi/linux/a.out.h                                | 3 ---
 5 files changed, 7 deletions(-)

diff --git a/Documentation/process/magic-number.rst b/Documentation/process/magic-number.rst
index eb2db3608a15..f48c6c6efaf7 100644
--- a/Documentation/process/magic-number.rst
+++ b/Documentation/process/magic-number.rst
@@ -69,7 +69,6 @@ Changelog::
 Magic Name            Number           Structure                File
 ===================== ================ ======================== ==========================================
 PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/pg.h``
-CMAGIC                0x0111           user                     ``include/linux/a.out.h``
 HDLC_MAGIC            0x239e           n_hdlc                   ``drivers/char/n_hdlc.c``
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
diff --git a/Documentation/translations/it_IT/process/magic-number.rst b/Documentation/translations/it_IT/process/magic-number.rst
index 86ef47906f37..27f60133fbe5 100644
--- a/Documentation/translations/it_IT/process/magic-number.rst
+++ b/Documentation/translations/it_IT/process/magic-number.rst
@@ -75,7 +75,6 @@ Registro dei cambiamenti::
 Nome magico           Numero           Struttura                File
 ===================== ================ ======================== ==========================================
 PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/pg.h``
-CMAGIC                0x0111           user                     ``include/linux/a.out.h``
 HDLC_MAGIC            0x239e           n_hdlc                   ``drivers/char/n_hdlc.c``
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
diff --git a/Documentation/translations/zh_CN/process/magic-number.rst b/Documentation/translations/zh_CN/process/magic-number.rst
index cbefdcbfbf53..520cc5cf4d63 100644
--- a/Documentation/translations/zh_CN/process/magic-number.rst
+++ b/Documentation/translations/zh_CN/process/magic-number.rst
@@ -58,7 +58,6 @@ Linux 魔术数
 魔术数名              数字             结构                     文件
 ===================== ================ ======================== ==========================================
 PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/pg.h``
-CMAGIC                0x0111           user                     ``include/linux/a.out.h``
 HDLC_MAGIC            0x239e           n_hdlc                   ``drivers/char/n_hdlc.c``
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
diff --git a/Documentation/translations/zh_TW/process/magic-number.rst b/Documentation/translations/zh_TW/process/magic-number.rst
index 7fd6e494467b..7d6debd0117e 100644
--- a/Documentation/translations/zh_TW/process/magic-number.rst
+++ b/Documentation/translations/zh_TW/process/magic-number.rst
@@ -61,7 +61,6 @@ Linux 魔術數
 魔術數名              數字             結構                     文件
 ===================== ================ ======================== ==========================================
 PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/pg.h``
-CMAGIC                0x0111           user                     ``include/linux/a.out.h``
 HDLC_MAGIC            0x239e           n_hdlc                   ``drivers/char/n_hdlc.c``
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
diff --git a/include/uapi/linux/a.out.h b/include/uapi/linux/a.out.h
index 5fafde3798e5..bb15da96df2a 100644
--- a/include/uapi/linux/a.out.h
+++ b/include/uapi/linux/a.out.h
@@ -70,9 +70,6 @@ enum machine_type {
    The first page is unmapped to help trap NULL pointer references */
 #define QMAGIC 0314
 
-/* Code indicating core file.  */
-#define CMAGIC 0421
-
 #if !defined (N_BADMAG)
 #define N_BADMAG(x)	  (N_MAGIC(x) != OMAGIC		\
 			&& N_MAGIC(x) != NMAGIC		\
-- 
2.30.2

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