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Diffstat (limited to '0001-kABI-Add-generic-kABI-macros-to-use-for-kABI-workaro.patch')
| -rw-r--r-- | 0001-kABI-Add-generic-kABI-macros-to-use-for-kABI-workaro.patch | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/0001-kABI-Add-generic-kABI-macros-to-use-for-kABI-workaro.patch b/0001-kABI-Add-generic-kABI-macros-to-use-for-kABI-workaro.patch deleted file mode 100644 index 4b895c6c4..000000000 --- a/0001-kABI-Add-generic-kABI-macros-to-use-for-kABI-workaro.patch +++ /dev/null @@ -1,214 +0,0 @@ -From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 -From: Myron Stowe <myron.stowe@redhat.com> -Date: Fri, 29 Jun 2018 20:05:41 -0400 -Subject: [PATCH] kABI: Add generic kABI macros to use for kABI workarounds - -Message-id: <20180629200436.151355.18581.stgit@tak.stowe> -Patchwork-id: 223206 -O-Subject: [RHEL8.0 PATCH v3] kABI: Add generic kABI macros to use for kABI workarounds -Bugzilla: 1546831 -RH-Acked-by: Larry Woodman <lwoodman@redhat.com> -RH-Acked-by: Jarod Wilson <jarod@redhat.com> - -Some kernel subsystem maintainers have asked about kABI for RHEL8.0 -- getting kABI related "extension" structures and such into place. The -consensus was to wait until the 4.17 re-base. Now that that's occurred, -lets get this first step, kABI macros, into RHEL8.0 so developers will -notice, and use, them in subsequent kABI related efforts. - -Content taken from RHEL 7. No functional change intended. - -Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1546831 -Brew: https://brewweb.devel.redhat.com/taskinfo?taskID=16694565 -Upstream Status: N/A (RHEL only) -Testing: Passed through brew build. - -Upstream Status: RHEL only -Signed-off-by: Myron Stowe <myron.stowe@redhat.com> -Signed-off-by: Herton R. Krzesinski <herton@redhat.com> ---- - include/linux/rh_kabi.h | 172 ++++++++++++++++++++++++++++++++++++++++ - 1 file changed, 172 insertions(+) - create mode 100644 include/linux/rh_kabi.h - -diff --git a/include/linux/rh_kabi.h b/include/linux/rh_kabi.h -new file mode 100644 -index 000000000000..e0d3353802bb ---- /dev/null -+++ b/include/linux/rh_kabi.h -@@ -0,0 +1,172 @@ -+/* -+ * rh_kabi.h - Red Hat kABI abstraction header -+ * -+ * Copyright (c) 2014 Don Zickus -+ * Copyright (c) 2015-2017 Jiri Benc -+ * Copyright (c) 2015 Sabrina Dubroca, Hannes Frederic Sowa -+ * Copyright (c) 2016-2018 Prarit Bhargava -+ * Copyright (c) 2017 Paolo Abeni, Larry Woodman -+ * -+ * This file is released under the GPLv2. -+ * See the file COPYING for more details. -+ * -+ * These kabi macros hide the changes from the kabi checker and from the -+ * process that computes the exported symbols' checksums. -+ * They have 2 variants: one (defined under __GENKSYMS__) used when -+ * generating the checksums, and the other used when building the kernel's -+ * binaries. -+ * -+ * The use of these macros does not guarantee that the usage and modification -+ * of code is correct. As with all Red Hat only changes, an engineer must -+ * explain why the use of the macro is valid in the patch containing the -+ * changes. -+ * -+ */ -+ -+#ifndef _LINUX_RH_KABI_H -+#define _LINUX_RH_KABI_H -+ -+#include <linux/compiler.h> -+#include <linux/stringify.h> -+ -+/* -+ * RH_KABI_CONST -+ * Adds a new const modifier to a function parameter preserving the old -+ * checksum. -+ * -+ * RH_KABI_DEPRECATE -+ * Mark the element as deprecated and make it unusable by modules while -+ * preserving kABI checksums. -+ * -+ * RH_KABI_DEPRECATE_FN -+ * Mark the function pointer as deprecated and make it unusable by modules -+ * while preserving kABI checksums. -+ * -+ * RH_KABI_EXTEND -+ * Simple macro for adding a new element to a struct. -+ * -+ * Warning: only use if a hole exists for _all_ arches. Use pahole to verify. -+ * -+ * RH_KABI_FILL_HOLE -+ * Simple macro for filling a hole in a struct. -+ * -+ * RH_KABI_RENAME -+ * Simple macro for renaming an element without changing its type. This -+ * macro can be used in bitfields, for example. -+ * -+ * NOTE: does not include the final ';' -+ * -+ * RH_KABI_REPLACE -+ * Simple replacement of _orig with a union of _orig and _new. -+ * -+ * The RH_KABI_REPLACE* macros attempt to add the ability to use the '_new' -+ * element while preserving size alignment with the '_orig' element. -+ * -+ * The #ifdef __GENKSYMS__ preserves the kABI agreement, while the anonymous -+ * union structure preserves the size alignment (assuming the '_new' element -+ * is not bigger than the '_orig' element). -+ * -+ * RH_KABI_REPLACE_UNSAFE -+ * Unsafe version of RH_KABI_REPLACE. Only use for typedefs. -+ * -+ * RH_KABI_FORCE_CHANGE -+ * Force change of the symbol checksum. The argument of the macro is a -+ * version for cases we need to do this more than once. -+ * -+ * This macro does the opposite: it changes the symbol checksum without -+ * actually changing anything about the exported symbol. It is useful for -+ * symbols that are not whitelisted, we're changing them in an -+ * incompatible way and want to prevent 3rd party modules to silently -+ * corrupt memory. Instead, by changing the symbol checksum, such modules -+ * won't be loaded by the kernel. This macro should only be used as a -+ * last resort when all other KABI workarounds have failed. -+ * -+ * NOTE -+ * Don't use ';' after these macros as it messes up the kABI checker by -+ * changing what the resulting token string looks like. Instead let this -+ * macro add the ';' so it can be properly hidden from the kABI checker -+ * (mainly for RH_KABI_EXTEND, but applied to all macros for uniformity). -+ * -+ */ -+#ifdef __GENKSYMS__ -+ -+# define RH_KABI_CONST -+# define RH_KABI_EXTEND(_new) -+# define RH_KABI_FILL_HOLE(_new) -+# define RH_KABI_FORCE_CHANGE(ver) __attribute__((rh_kabi_change ## ver)) -+# define RH_KABI_RENAME(_orig, _new) _orig -+ -+# define _RH_KABI_DEPRECATE(_type, _orig) _type _orig -+# define _RH_KABI_DEPRECATE_FN(_type, _orig, _args...) _type (*_orig)(_args) -+# define _RH_KABI_REPLACE(_orig, _new) _orig -+# define _RH_KABI_REPLACE_UNSAFE(_orig, _new) _orig -+ -+#else -+ -+# define RH_KABI_ALIGN_WARNING ". Disable CONFIG_RH_KABI_SIZE_ALIGN_CHECKS if debugging." -+ -+# define RH_KABI_CONST const -+# define RH_KABI_EXTEND(_new) _new; -+# define RH_KABI_FILL_HOLE(_new) _new; -+# define RH_KABI_FORCE_CHANGE(ver) -+# define RH_KABI_RENAME(_orig, _new) _new -+ -+ -+#if IS_BUILTIN(CONFIG_RH_KABI_SIZE_ALIGN_CHECKS) -+# define __RH_KABI_CHECK_SIZE_ALIGN(_orig, _new) \ -+ union { \ -+ _Static_assert(sizeof(struct{_new;}) <= sizeof(struct{_orig;}), \ -+ __FILE__ ":" __stringify(__LINE__) ": " __stringify(_new) " is larger than " __stringify(_orig) RH_KABI_ALIGN_WARNING); \ -+ _Static_assert(__alignof__(struct{_new;}) <= __alignof__(struct{_orig;}), \ -+ __FILE__ ":" __stringify(__LINE__) ": " __stringify(_orig) " is not aligned the same as " __stringify(_new) RH_KABI_ALIGN_WARNING); \ -+ } -+#else -+# define __RH_KABI_CHECK_SIZE_ALIGN(_orig, _new) -+#endif -+ -+# define _RH_KABI_DEPRECATE(_type, _orig) _type rh_reserved_##_orig -+# define _RH_KABI_DEPRECATE_FN(_type, _orig, _args...) \ -+ _type (* rh_reserved_##_orig)(_args) -+# define _RH_KABI_REPLACE(_orig, _new) \ -+ union { \ -+ _new; \ -+ struct { \ -+ _orig; \ -+ } __UNIQUE_ID(rh_kabi_hide); \ -+ __RH_KABI_CHECK_SIZE_ALIGN(_orig, _new); \ -+ } -+# define _RH_KABI_REPLACE_UNSAFE(_orig, _new) _new -+ -+#endif /* __GENKSYMS__ */ -+ -+/* semicolon added wrappers for the RH_KABI_REPLACE macros */ -+# define RH_KABI_DEPRECATE(_type, _orig) _RH_KABI_DEPRECATE(_type, _orig); -+# define RH_KABI_DEPRECATE_FN(_type, _orig, _args...) \ -+ _RH_KABI_DEPRECATE_FN(_type, _orig, _args); -+# define RH_KABI_REPLACE(_orig, _new) _RH_KABI_REPLACE(_orig, _new); -+# define RH_KABI_REPLACE_UNSAFE(_orig, _new) _RH_KABI_REPLACE_UNSAFE(_orig, _new); -+/* -+ * Macro for breaking up a random element into two smaller chunks using an -+ * anonymous struct inside an anonymous union. -+ */ -+# define RH_KABI_REPLACE2(orig, _new1, _new2) RH_KABI_REPLACE(orig, struct{ _new1; _new2;}) -+ -+# define RH_KABI_RESERVE(n) _RH_KABI_RESERVE(n); -+/* -+ * Simple wrappers to replace standard Red Hat reserved elements. -+ */ -+# define RH_KABI_USE(n, _new) RH_KABI_REPLACE(_RH_KABI_RESERVE(n), _new) -+/* -+ * Macros for breaking up a reserved element into two smaller chunks using -+ * an anonymous struct inside an anonymous union. -+ */ -+# define RH_KABI_USE2(n, _new1, _new2) RH_KABI_REPLACE(_RH_KABI_RESERVE(n), struct{ _new1; _new2; }) -+ -+/* -+ * We tried to standardize on Red Hat reserved names. These wrappers -+ * leverage those common names making it easier to read and find in the -+ * code. -+ */ -+# define _RH_KABI_RESERVE(n) unsigned long rh_reserved##n -+ -+#endif /* _LINUX_RH_KABI_H */ --- -2.26.2 - |