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authorLinus Torvalds <torvalds@linux-foundation.org>2021-09-12 11:56:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-12 11:56:00 -0700
commitd8e988b62f948d47dd86ec655c89d54053df1754 (patch)
tree07a31560828d5b13c50cc8bea282d1aacebd36d3
parent1791596be2723f01de2f69d16a422fdba182c706 (diff)
parent3a3a11e6e5a2bc0595c7e36ae33c861c9e8c75b1 (diff)
Merge tag 'char-misc-5.15-rc1-lkdtm' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull misc driver fix from Greg KH: "Here is a single patch for 5.15-rc1, for the lkdtm misc driver. It resolves a build issue that many people were hitting with your current tree, and Kees and others felt would be good to get merged before -rc1 comes out, to prevent them from having to constantly hit it as many development trees restart on -rc1, not older -rc releases. It has NOT been in linux-next, but has passed 0-day testing and looks 'obviously correct' when reviewing it locally :)" * tag 'char-misc-5.15-rc1-lkdtm' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: lkdtm: Use init_uts_ns.name instead of macros
-rw-r--r--drivers/misc/lkdtm/core.c10
-rw-r--r--drivers/misc/lkdtm/lkdtm.h28
2 files changed, 27 insertions, 11 deletions
diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c
index 95b1c6800a22..fe6fd34b8caf 100644
--- a/drivers/misc/lkdtm/core.c
+++ b/drivers/misc/lkdtm/core.c
@@ -26,6 +26,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
+#include <linux/utsname.h>
#define DEFAULT_COUNT 10
@@ -210,6 +211,8 @@ module_param(cpoint_count, int, 0644);
MODULE_PARM_DESC(cpoint_count, " Crash Point Count, number of times the "\
"crash point is to be hit to trigger action");
+/* For test debug reporting. */
+char *lkdtm_kernel_info;
/* Return the crashtype number or NULL if the name is invalid */
static const struct crashtype *find_crashtype(const char *name)
@@ -490,6 +493,11 @@ static int __init lkdtm_module_init(void)
crash_count = cpoint_count;
#endif
+ /* Common initialization. */
+ lkdtm_kernel_info = kasprintf(GFP_KERNEL, "kernel (%s %s)",
+ init_uts_ns.name.release,
+ init_uts_ns.name.machine);
+
/* Handle test-specific initialization. */
lkdtm_bugs_init(&recur_count);
lkdtm_perms_init();
@@ -538,6 +546,8 @@ static void __exit lkdtm_module_exit(void)
if (lkdtm_kprobe != NULL)
unregister_kprobe(lkdtm_kprobe);
+ kfree(lkdtm_kernel_info);
+
pr_info("Crash point unregistered\n");
}
diff --git a/drivers/misc/lkdtm/lkdtm.h b/drivers/misc/lkdtm/lkdtm.h
index d7d64d9765eb..c212a253edde 100644
--- a/drivers/misc/lkdtm/lkdtm.h
+++ b/drivers/misc/lkdtm/lkdtm.h
@@ -5,17 +5,17 @@
#define pr_fmt(fmt) "lkdtm: " fmt
#include <linux/kernel.h>
-#include <generated/compile.h>
-#include <generated/utsrelease.h>
-#define LKDTM_KERNEL "kernel (" UTS_RELEASE " " UTS_MACHINE ")"
+extern char *lkdtm_kernel_info;
#define pr_expected_config(kconfig) \
{ \
if (IS_ENABLED(kconfig)) \
- pr_err("Unexpected! This " LKDTM_KERNEL " was built with " #kconfig "=y\n"); \
+ pr_err("Unexpected! This %s was built with " #kconfig "=y\n", \
+ lkdtm_kernel_info); \
else \
- pr_warn("This is probably expected, since this " LKDTM_KERNEL " was built *without* " #kconfig "=y\n"); \
+ pr_warn("This is probably expected, since this %s was built *without* " #kconfig "=y\n", \
+ lkdtm_kernel_info); \
}
#ifndef MODULE
@@ -25,24 +25,30 @@ int lkdtm_check_bool_cmdline(const char *param);
if (IS_ENABLED(kconfig)) { \
switch (lkdtm_check_bool_cmdline(param)) { \
case 0: \
- pr_warn("This is probably expected, since this " LKDTM_KERNEL " was built with " #kconfig "=y but booted with '" param "=N'\n"); \
+ pr_warn("This is probably expected, since this %s was built with " #kconfig "=y but booted with '" param "=N'\n", \
+ lkdtm_kernel_info); \
break; \
case 1: \
- pr_err("Unexpected! This " LKDTM_KERNEL " was built with " #kconfig "=y and booted with '" param "=Y'\n"); \
+ pr_err("Unexpected! This %s was built with " #kconfig "=y and booted with '" param "=Y'\n", \
+ lkdtm_kernel_info); \
break; \
default: \
- pr_err("Unexpected! This " LKDTM_KERNEL " was built with " #kconfig "=y (and booted without '" param "' specified)\n"); \
+ pr_err("Unexpected! This %s was built with " #kconfig "=y (and booted without '" param "' specified)\n", \
+ lkdtm_kernel_info); \
} \
} else { \
switch (lkdtm_check_bool_cmdline(param)) { \
case 0: \
- pr_warn("This is probably expected, as this " LKDTM_KERNEL " was built *without* " #kconfig "=y and booted with '" param "=N'\n"); \
+ pr_warn("This is probably expected, as this %s was built *without* " #kconfig "=y and booted with '" param "=N'\n", \
+ lkdtm_kernel_info); \
break; \
case 1: \
- pr_err("Unexpected! This " LKDTM_KERNEL " was built *without* " #kconfig "=y but booted with '" param "=Y'\n"); \
+ pr_err("Unexpected! This %s was built *without* " #kconfig "=y but booted with '" param "=Y'\n", \
+ lkdtm_kernel_info); \
break; \
default: \
- pr_err("This is probably expected, since this " LKDTM_KERNEL " was built *without* " #kconfig "=y (and booted without '" param "' specified)\n"); \
+ pr_err("This is probably expected, since this %s was built *without* " #kconfig "=y (and booted without '" param "' specified)\n", \
+ lkdtm_kernel_info); \
break; \
} \
} \