lkml.org 
[lkml]   [2017]   [Oct]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v5 1/2] acpi: apei: remove the unused dead-code for SEA/NMI notification type
From
Date
Hi,Borislav

On 2017/10/18 0:43, Borislav Petkov wrote:
>> -}
>> -
> So GHES NMI notification method is x86-only AFAIK and HAVE_ACPI_APEI_NMI
> is selected only on x86. Why are you removing those guards? Does ARM
> have ACPI_HEST_NOTIFY_NMI notification type now too?

ARM does not have ACPI_HEST_NOTIFY_NMI notification, which should only used by x86.
In the code, I see those guards are never used. As you see, if the 'CONFIG_HAVE_ACPI_APEI_NMI'
does not defined in [1], it will print error info and goto [2], in the [2], it will return error,
then the probe for GHES NMI is failed. so those guards( ghes_nmi_add() and ghes_nmi_remove()) have no chance
to execute. so I redefine them to NULL for compiling[3].

static int ghes_probe(struct platform_device *ghes_dev)
{
struct acpi_hest_generic *generic;
struct ghes *ghes = NULL;

int rc = -EINVAL;

switch (generic->notify.type) {
...................
case ACPI_HEST_NOTIFY_NMI: [1]
if (!IS_ENABLED(CONFIG_HAVE_ACPI_APEI_NMI)) {
pr_warn(GHES_PFX "Generic hardware error source: %d notified via NMI interrupt is not supported!\n",
generic->header.source_id);
goto err;
}
..............
}
switch (generic->notify.type) {
...............
case ACPI_HEST_NOTIFY_NMI:
ghes_nmi_add(ghes);
break;
}
..........
err: [2]
if (ghes) {
ghes_fini(ghes);
kfree(ghes);
}
return rc;
}

[3]:
-static inline void ghes_nmi_add(struct ghes *ghes)
-{
- pr_err(GHES_PFX "ID: %d, trying to add NMI notification which is not supported!\n",
- ghes->generic->header.source_id);
- BUG();
-}
-
-static inline void ghes_nmi_remove(struct ghes *ghes)
-{
- pr_err(GHES_PFX "ID: %d, trying to remove NMI notification which is not supported!\n",
- ghes->generic->header.source_id);
- BUG();
-}
-
-static inline void ghes_nmi_init_cxt(void)
-{
-}
+static inline void ghes_nmi_add(struct ghes *ghes) { }
+static inline void ghes_nmi_remove(struct ghes *ghes) { }
+static inline void ghes_nmi_init_cxt(void) { }




\
 
 \ /
  Last update: 2017-10-22 17:08    [W:0.118 / U:4.408 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site