diff options
Diffstat (limited to '0008-Linux-5.11-Test-32bit-compat-with-in_compat_syscall.patch')
| -rw-r--r-- | 0008-Linux-5.11-Test-32bit-compat-with-in_compat_syscall.patch | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/0008-Linux-5.11-Test-32bit-compat-with-in_compat_syscall.patch b/0008-Linux-5.11-Test-32bit-compat-with-in_compat_syscall.patch deleted file mode 100644 index 87b7285fed0e..000000000000 --- a/0008-Linux-5.11-Test-32bit-compat-with-in_compat_syscall.patch +++ /dev/null @@ -1,98 +0,0 @@ -From 2d85a5b7a1011386d66cc36512a54e80b6cfa515 Mon Sep 17 00:00:00 2001 -From: Cheyenne Wills <cwills@sinenomine.net> -Date: Fri, 22 Jan 2021 07:57:55 -0700 -Subject: [PATCH 8/8] Linux 5.11: Test 32bit compat with in_compat_syscall - -Linux 5.11 removed the TIF_IA32 thread flag with commit: - x86: Reclaim TIF_IA32 and TIF_X32 (8d71d2bf6efec) - -The flag TIF_IA32 was being used by openafs to determine if the task was -handling a syscall request from a 32 bit process. Building against a -Linux 5.11 kernel results in a build failure as TIF_IA32 is undefined. - -The function 'in_compat_syscall' was introduced in Linux 4.6 as -the preferred method to determine if a syscall needed to handle a -compatible call (e.g. 32bit application). - -To resolve the build problem, use 'in_compat_syscall' if present (Linux -4.6 and later) to determine if the syscall needs to handle a -compatibility mode call. - -Add autoconf check for in_compat_syscall. - -Notes about in_compat_syscall: - -In Linux 4.6 'in_compat_syscall' was defined for all architectures with -a generic return of 'is_compat_task', but allows architecture specific -overriding implementations (x86 and sparc). - -At 4.6 (and later), the function 'is_compat_task' is defined only for -the following architectures to return: - -Arch Returns -======= ============================== -arm64 test_thread_flag(TIF_32BIT); -mips test_thread_flag(TIF_32BIT_ADDR) -parisc test_ti_thread_flag(task_thread_info(t), TIF_32BIT) -powerpc is_32bit_task() -s390 test_thread_flag(TIF_31BIT) -sparc test_thread_flag(TIF_32BIT) - -If the Linux kernel is not built with compat mode, is_compat_task and -in_compat_syscall is set to always return 0 - -Linux commit that introduced in_compat_syscall: - compat: add in_compat_syscall to ask whether we're in a compat syscall - (5180e3e24fd3e8e7) - -Reviewed-on: https://gerrit.openafs.org/14499 -Reviewed-by: Andrew Deason <adeason@sinenomine.net> -Reviewed-by: Benjamin Kaduk <kaduk@mit.edu> -Tested-by: BuildBot <buildbot@rampaginggeek.com> -(cherry picked from commit 78ef922612bef5f5fd6904896e84b9d2ea802404) - -Change-Id: I4eca62f19ae58fd830915feff5098cec2825f099 -Reviewed-on: https://gerrit.openafs.org/14511 -Reviewed-by: Cheyenne Wills <cwills@sinenomine.net> -Tested-by: Cheyenne Wills <cwills@sinenomine.net> -Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de> ---- - src/afs/LINUX/osi_machdep.h | 4 +++- - src/cf/linux-kernel-func.m4 | 6 ++++++ - 2 files changed, 9 insertions(+), 1 deletion(-) - -diff --git a/src/afs/LINUX/osi_machdep.h b/src/afs/LINUX/osi_machdep.h -index 9ecdaf0bf..066c1885f 100644 ---- a/src/afs/LINUX/osi_machdep.h -+++ b/src/afs/LINUX/osi_machdep.h -@@ -167,7 +167,9 @@ static inline long copyinstr(char *from, char *to, int count, int *length) { - static inline int - afs_in_compat_syscall(void) - { --# if defined(AFS_SPARC64_LINUX26_ENV) -+# if defined(HAVE_LINUX_IN_COMPAT_SYSCALL) -+ return in_compat_syscall(); -+# elif defined(AFS_SPARC64_LINUX26_ENV) - return test_thread_flag(TIF_32BIT); - # elif defined(AFS_SPARC64_LINUX24_ENV) - return (current->thread.flags & SPARC_FLAG_32BIT) != 0; -diff --git a/src/cf/linux-kernel-func.m4 b/src/cf/linux-kernel-func.m4 -index e45a30540..5b4060238 100644 ---- a/src/cf/linux-kernel-func.m4 -+++ b/src/cf/linux-kernel-func.m4 -@@ -157,6 +157,12 @@ AC_CHECK_LINUX_FUNC([lru_cache_add_file], - [#include <linux/swap.h>], - [lru_cache_add_file(NULL);]) - -+dnl Linux 4.6 introduced in_compat_syscall as replacement for is_compat_task -+dnl for certain platforms. -+AC_CHECK_LINUX_FUNC([in_compat_syscall], -+ [#include <linux/compat.h>], -+ [in_compat_syscall();]) -+ - dnl lru_cache_add exported in Linux 5.8 - dnl replaces lru_cache_add_file - AC_CHECK_LINUX_FUNC([lru_cache_add], --- -2.30.1 - |