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| author | Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2012-07-20 11:15:01 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-07-20 11:15:01 +0200 |
| commit | 2b7547578b9fdf811072cfc0c3594eb370e7d219 (patch) | |
| tree | 5c14ba9e87c19db2d644a91aec127307afe7385b | |
| parent | 50bb1f761e420776a4d10798babfc76793d4056c (diff) | |
| download | linux-2b7547578b9fdf811072cfc0c3594eb370e7d219.tar.bz2 | |
s390/lgr: Add init check to lgr_info_log()
If lgr has not been initialized, the lgr_info_log() function currently
crashes because 'lgr_page' is not allocated. To fix this 'lgr_page'
is allocated statically now.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/kernel/lgr.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/arch/s390/kernel/lgr.c b/arch/s390/kernel/lgr.c index 87f080b17af1..eca94e74d19a 100644 --- a/arch/s390/kernel/lgr.c +++ b/arch/s390/kernel/lgr.c @@ -45,7 +45,7 @@ struct lgr_info { /* * LGR globals */ -static void *lgr_page; +static char lgr_page[PAGE_SIZE] __aligned(PAGE_SIZE); static struct lgr_info lgr_info_last; static struct lgr_info lgr_info_cur; static struct debug_info *lgr_dbf; @@ -74,7 +74,7 @@ static void cpascii(char *dst, char *src, int size) */ static void lgr_stsi_1_1_1(struct lgr_info *lgr_info) { - struct sysinfo_1_1_1 *si = lgr_page; + struct sysinfo_1_1_1 *si = (void *) lgr_page; if (stsi(si, 1, 1, 1) == -ENOSYS) return; @@ -91,7 +91,7 @@ static void lgr_stsi_1_1_1(struct lgr_info *lgr_info) */ static void lgr_stsi_2_2_2(struct lgr_info *lgr_info) { - struct sysinfo_2_2_2 *si = lgr_page; + struct sysinfo_2_2_2 *si = (void *) lgr_page; if (stsi(si, 2, 2, 2) == -ENOSYS) return; @@ -105,7 +105,7 @@ static void lgr_stsi_2_2_2(struct lgr_info *lgr_info) */ static void lgr_stsi_3_2_2(struct lgr_info *lgr_info) { - struct sysinfo_3_2_2 *si = lgr_page; + struct sysinfo_3_2_2 *si = (void *) lgr_page; int i; if (stsi(si, 3, 2, 2) == -ENOSYS) @@ -183,14 +183,9 @@ static void lgr_timer_set(void) */ static int __init lgr_init(void) { - lgr_page = (void *) __get_free_pages(GFP_KERNEL, 0); - if (!lgr_page) - return -ENOMEM; lgr_dbf = debug_register("lgr", 1, 1, sizeof(struct lgr_info)); - if (!lgr_dbf) { - free_page((unsigned long) lgr_page); + if (!lgr_dbf) return -ENOMEM; - } debug_register_view(lgr_dbf, &debug_hex_ascii_view); lgr_info_get(&lgr_info_last); debug_event(lgr_dbf, 1, &lgr_info_last, sizeof(lgr_info_last)); |