[Xen-changelog] [xen staging] allow only sizeof(bool) variables for boolean_param()

[patchbot@xxxxxxx]

commit e5f88ef94a6928883562f6b0f4a4271f398f9cbc
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Thu Mar 5 10:40:40 2020 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Mar 5 10:40:40 2020 +0100

    allow only sizeof(bool) variables for boolean_param()
    
    Support of other variable sizes than that of normal bool ones for
    boolean_param() don't make sense, so catch any other sized variables
    at build time.
    
    Fix the one parameter using a plain int instead of bool.
    
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    [add __read_mostly]
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/hvm/asid.c | 2 +-
 xen/include/xen/param.h | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/xen/arch/x86/hvm/asid.c b/xen/arch/x86/hvm/asid.c
index 8e00a28443..d61d7fc33c 100644
--- a/xen/arch/x86/hvm/asid.c
+++ b/xen/arch/x86/hvm/asid.c
@@ -25,7 +25,7 @@
 #include <asm/hvm/asid.h>
 
 /* Xen command-line option to enable ASIDs */
-static int opt_asid_enabled = 1;
+static bool __read_mostly opt_asid_enabled = true;
 boolean_param("asid", opt_asid_enabled);
 
 /*
diff --git a/xen/include/xen/param.h b/xen/include/xen/param.h
index 75471eb4ad..d4578cd27f 100644
--- a/xen/include/xen/param.h
+++ b/xen/include/xen/param.h
@@ -2,6 +2,8 @@
 #define _XEN_PARAM_H
 
 #include <xen/init.h>
+#include <xen/lib.h>
+#include <xen/stdbool.h>
 
 /*
  * Used for kernel command line parameter setup
@@ -46,7 +48,8 @@ extern const struct kernel_param __param_start[], 
__param_end[];
     __kparam __setup_##_var = \
         { .name = __setup_str_##_var, \
           .type = OPT_BOOL, \
-          .len = sizeof(_var), \
+          .len = sizeof(_var) + \
+                 BUILD_BUG_ON_ZERO(sizeof(_var) != sizeof(bool)), \
           .par.var = &_var }
 #define integer_param(_name, _var) \
     __setup_str __setup_str_##_var[] = _name; \
@@ -86,7 +89,8 @@ extern const struct kernel_param __param_start[], 
__param_end[];
     __rtparam __rtpar_##_var = \
         { .name = _name, \
           .type = OPT_BOOL, \
-          .len = sizeof(_var), \
+          .len = sizeof(_var) + \
+                 BUILD_BUG_ON_ZERO(sizeof(_var) != sizeof(bool)), \
           .par.var = &_var }
 #define integer_runtime_only_param(_name, _var) \
     __rtparam __rtpar_##_var = \
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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