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Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/0015-fscache-initialize-cookie-hash-table-raw-spinlocks.patch | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/debian/patches-rt/0015-fscache-initialize-cookie-hash-table-raw-spinlocks.patch b/debian/patches-rt/0015-fscache-initialize-cookie-hash-table-raw-spinlocks.patch new file mode 100644 index 000000000..1aef96ead --- /dev/null +++ b/debian/patches-rt/0015-fscache-initialize-cookie-hash-table-raw-spinlocks.patch @@ -0,0 +1,64 @@ +From efd6f660496f4a70e788963b4b914791eed32c42 Mon Sep 17 00:00:00 2001 +From: Clark Williams <williams@redhat.com> +Date: Tue, 3 Jul 2018 13:34:30 -0500 +Subject: [PATCH 015/347] fscache: initialize cookie hash table raw spinlocks +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +The fscache cookie mechanism uses a hash table of hlist_bl_head structures. The +PREEMPT_RT patcheset adds a raw spinlock to this structure and so on PREEMPT_RT +the structures get used uninitialized, causing warnings about bad magic numbers +when spinlock debugging is turned on. + +Use the init function for fscache cookies. + +Signed-off-by: Clark Williams <williams@redhat.com> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + fs/fscache/cookie.c | 8 ++++++++ + fs/fscache/main.c | 1 + + include/linux/fscache.h | 1 + + 3 files changed, 10 insertions(+) + +diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c +index 2ff05adfc22a..b2b9a85a4ba5 100644 +--- a/fs/fscache/cookie.c ++++ b/fs/fscache/cookie.c +@@ -950,3 +950,11 @@ int __fscache_check_consistency(struct fscache_cookie *cookie, + return -ESTALE; + } + EXPORT_SYMBOL(__fscache_check_consistency); ++ ++void __init fscache_cookie_init(void) ++{ ++ int i; ++ ++ for (i = 0; i < (1 << fscache_cookie_hash_shift) - 1; i++) ++ INIT_HLIST_BL_HEAD(&fscache_cookie_hash[i]); ++} +diff --git a/fs/fscache/main.c b/fs/fscache/main.c +index aa49234e9520..95a0798de381 100644 +--- a/fs/fscache/main.c ++++ b/fs/fscache/main.c +@@ -188,6 +188,7 @@ static int __init fscache_init(void) + ret = -ENOMEM; + goto error_cookie_jar; + } ++ fscache_cookie_init(); + + fscache_root = kobject_create_and_add("fscache", kernel_kobj); + if (!fscache_root) +diff --git a/include/linux/fscache.h b/include/linux/fscache.h +index 84b90a79d75a..87a9330eafa2 100644 +--- a/include/linux/fscache.h ++++ b/include/linux/fscache.h +@@ -230,6 +230,7 @@ extern void __fscache_readpages_cancel(struct fscache_cookie *cookie, + extern void __fscache_disable_cookie(struct fscache_cookie *, const void *, bool); + extern void __fscache_enable_cookie(struct fscache_cookie *, const void *, loff_t, + bool (*)(void *), void *); ++extern void fscache_cookie_init(void); + + /** + * fscache_register_netfs - Register a filesystem as desiring caching services +-- +2.36.1 + |